...Comparator Design For the comparator, we use the fully dynamic comparator (StrongArm) configuration. For minimum area and power, we use minimum sized transistors for the latch as long as the specs are met. Offset calculation: For minimum size device, ΔVth is approximately = 0.1tox/√(WL) = 0.1*23.3/√(0.12*0.1)=21mV. Voffset at the input = ΔVth,M1:M2 + ΔVth,M3:M4/(2Vth/V*) + ΔVth,M1:M2/(2Vth/V*)^2 where Vth is about 200mV and V* is about 80mV. The pre-charged transistors do not contribute to the offset since they are just acting as switches (i.e their Vth’s do not matter). Thus Vio, comparator = 21 + 21/(400/80) + 21/(400/80)^2 = 26 mV < 50mV. The spec is met. Overclocked recovery test: We applied a differential input of 1.2V and an input of -1mV in sequence. The following graph shows that the latch operates correctly. Regenerative gain: The following graph shows the regenerative gain for three temperatures. The worst case gain happens at the highest temperature T= 120°C The slope of the regenerative gain graph in dB scale is given by 20*(log e)/Ts where Ts = CL/gm where gm is the gm of the inverter pair ≈ 100u and CL = 10f. Slope in logscale = 20*(log e)*100u/10f = 86.8 dB per 1ns which is close to the simulation results. Total Integrated Noise at output: The following graph shows the total integrated noise at the output over time for three temperatures. The worst case happens at the highest temperature T=120 The following graph shows the noise contribution...
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...IEEE JOURNAL OF SOLID-STATE CIRCUITS, VOL. 47, NO. 7, JULY 2012 1585 A 53-nW 9.1-ENOB 1-kS/s SAR ADC in 0.13- m CMOS for Medical Implant Devices Dai Zhang, Student Member, IEEE, Ameya Bhide, Student Member, IEEE, and Atila Alvandpour, Senior Member, IEEE Abstract—This paper describes an ultra-low power SAR ADC for medical implant devices. To achieve the nano-watt range power consumption, an ultra-low power design strategy has been utilized, imposing maximum simplicity on the ADC architecture, low transistor count and matched capacitive DAC with a switching scheme which results in full-range sampling without switch bootstrapping and extra reset voltage. Furthermore, a dual-supply voltage scheme allows the SAR logic to operate at 0.4 V, reducing the overall power consumption of the ADC by 15% without any loss in performance. The ADC was fabricated in 0.13- m CMOS. In dual-supply mode (1.0 V for analog and 0.4 V for digital), the ADC consumes 53 nW at a sampling rate of 1 kS/s and achieves the ENOB of 9.1 bits. The leakage power constitutes 25% of the 53-nW total power. Index Terms—ADC, analog-to-digital conversion, leakage power consumption, low-power electronics, medical implant devices, successive approximation. I. INTRODUCTION EDICAL implant devices, such as pacemakers and implantable cardiac defibrillators, target increasingly advanced signal acquisition and signal processing systems. Such devices, which are to be implanted in the human body, require extremely low...
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...3-Part 3, complete the Lab Report. * Answer the questions and transcribe/transfer test results recorded in the lab’s tables to the tables provided. ------------------------------------------------- Part 1- Comparators and the Schmitt Trigger Theory: 1. What is the purpose of a comparator? A comparator is a switching device that provides a high or low output depending on which of the inputs is bigger. 2. What type of circuit uses hysteresis to avoid rapid switching due to noise? Schmitt Trigger Preparation: 3. Describe the transfer curve of a basic comparator circuit. The horizontal axis represents the input and the vertical axis represents the output Test Procedure: 4. Transcribe the comparator waveforms from Plot 22-1 to the Plot below. Plot 22-1: Comparator waveform 5. Describe how the threshold voltage changes the comparator output. As V+ increases, the output pulse width decreases. When V- decreases, the output pulse width increases. Varying the potentiometer changes the duty cycle of the output from 0 to 100%. 6. Transcribe the comparator transfer curve from Plot 22-2 to the Plot below. Plot 22-2: Comparator transfer curve 7. Describe how the threshold voltage changes the transfer curve for a comparator. The threshold voltage is a dc quantity that adds to or subtracts from the input plotted along the x-axis...
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...DESIGN OF A HIGH-SPEED CMOS COMPARATOR Master Thesis in Electronics System at Linköping Institute of Technology by Ahmad Shar LiTH-ISY-EX--07/4121--SE Linköping 2007-11-07 DESIGN OF A HIGH-SPEED CMOS COMPARATOR Master Thesis in Electronics System at Linköping Institute of Technology by Ahmad Shar LiTH-ISY-EX--07/4121--SE Supervisor: Erik Säll ISY, Linköping University Examiner: Mark Vesterbacka ISY, Linköping University Linköping 2007-11-07 Presentation Date 2007-11-07 Publishing Date (Electronic version) 2007-12-07 Department and Division Division of electronics system Department of Electrical Engineering Linköpings university Linköpings Sweden Language English Other (specify below) Type of Publication Licentiate thesis Degree thesis Thesis C-level Thesis D-level Report Other (specify below) ISBN Master Thesis ISRN: LiTH-ISY-EX--07/4121--SE Title of series (Licentiate thesis) Series number/ISSN (Licentiate thesis) Number of Pages 30 URL, Electronic Version http://www.ep.liu.se Publication Title Design of a high-speed CMOS comparator. Author(s) Ahmad Shar A bstract T his m aster thesis describ es the d esign of high-speed latched com p ara tor w ith 6-bit resolution , full scale voltage of 1 .6 V and the sa m plin g frequ ency of 25 0 M H z. T he com p arato r is d esigne d in a 0.3 5 9 m C M O S process w ith a sup ply voltage of 3.3 V . T he com parator is designed for tim e-in terleaved bandp ass sigm a-delta...
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...Comparator A comparator is a circuit that accepts two voltages, V1 and V2 and outputs zero volts if V1 > V2 or outputs a positive voltage level if V2 > V1. Comparators can be built from operational amplifiers. In laments term, a comparator is the simplest circuit that moves signals between the analog and digital worlds… Simply put, a comparator compares two analog signals and produces a one bit digital signal. This is the symbol for a comparator * The comparator output satisfies the following rules: * When V+ is larger than V- the output bit is 1. * When V+ is smaller than V- the output bit is 0 A prime example of a simple comparator circuit can be found within a programmable thermostat. With two separate inputs, three outcomes are achievable at any given time. When the base input becomes lower than the variable, a signal will be sent to the thermostat to activate the cooling feature, and that circuitry will allow that function to occur until both the base and variable are once again equal. At that point, the air conditioner would shut off until further instructions were provided. If the variable electrical node provided less electrical power than the constant, a signal would be generated to inform the thermostat to activate the heating element. It would remain on until the variables changed once again. Each of these functions are pre-programmed to react differently as the values change, and the comparator circuit design interprets them by...
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...Judgement The statement I decided to disagree with was under "Judgement" and this statement said "If society believes a behavior or a belief is morally wrong, it is a good idea to adopt and not challenge that belief." I strongly disagree with that. I truthfully believe that if a person has a strong belief on something, they should stay with it. No matter what it is. I don't think anyone should have to change their belief(s) just to fit in with society. It's your belief, therefore anyone else's opinion should be irrelevant. A lot of times with beliefs, you won't be alone with them. There will usually be someone right there with you who believes the same thing or something close enough to your belief. The biggest example that I can think of has to do with sexuality. A lot of people believe it is wrong. A lot more people argued for a long time about gay/bi/lesbian couples getting married. Eventually, thankfully, enough people stood up for themselves. Even more importantly; their beliefs. It's truly amazing to see how people standing up- and enough of them at that- get what they believe. Standing up for yourself is hard. These people went through a lot of work, shame and social problems getting to where they are today. So on June 26, American finally took the first step and made gay marriage legal. Many people probably hate that day, for a number of reasons. But that's okay, cause they aren't involved in it and it isn't tampering with their own personal beliefs. Overall, I do not...
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...Public Statements of Opinion The first amendment protects the right of people to have and share opinions. People speak their minds (unfortunately not always WITH their minds) knowing that the freedom of expressing their beliefs is there. The information gets published and it becomes available to the public through television, radio, internet, etc. and it ranges from sports outcomes to new gossip about the presidential election campaigns. The unfortunate part of all this is figuring out which opinions are worth taking in as reliable and valuable as this bulk of information comes from people from all over the world with different environments and issues that filter their views. Not everyone shares the same views and not all of the important information floating around will ever seem valuable, but people need to get their priorities straight and acknowledge what is really going on. The media is filled with random opinions of random people from random places and random backgrounds. So which ones do you trust? The people with the highest education can be reliable with technical facts, but what about personal views? Do you trust the opinion of a renowned physicist when he makes a comment about a “true” religion? Is a mathematician the best person to comment about how abortion is wrong and that it should be illegal? You have the right to creating your own views and choosing to not believe any other opinions. Everyone is allowed an opinion and the fact that the...
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...Some people say that the Internet provides people with a lot of valuable information. Others think access to so much information creates problems. Which view do you agree with? Use specific reasons and examples to support your opinion. There is no doubt that the Internet is one of the greatest humankind's inventions of the last century. It is fast and easy way to get a lot of valuable information. However, some people believe that the Internet creates many problems. From my point of view I think that the Internet brings us advantages as well as disadvantages. First of all, I think that the Internet brings us many benefits. People can have access to the latest news, weather, traffic, bid-and-asked quotations, etc. Another important benefit is that the Internet is a great means of communication. A few years ago it was rather difficult to imagine that it would be possible to communicate with people from all around the world. Students have the opportunity to speak to the professors from prestigious universities, ask their opinions and extend their range of interests. People have the opportunity to communicate with the people from other countries, find out their customs, traditions and even visit each other. I think that the Internet makes our world smaller and friendlier. We' ve got the chance to learn more about the world's history, our forefathers and gain more knowledge. From the other hand, many questions and difficulties arose with the appearance of the Internet. For example...
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...means that any individual has his or her own opinions about certain things regardless of being right or wrong. He advances in saying that it is a phenomenon known as “a natural defense mechanism to avoid that cognitive dissonance.” Keohanes explains that in order for a something to “backfire,” an individual whose opinion about a fact is proven wrong he or she gets defensive and believes they’re even more right than they were before. An example he gives of this in his essay is when Keohane describes a situation in which a group of people were asked if they believed there were WMDs in Iraq. Of all those who answered that they believed there was WMDs in Iraq, would not accept that this was in fact a lie and instead believed that there WMDs were in Iraq even more; regardless of the correction. This situation proves the concept of “backfire,” because it demonstrates the idea that the more an individual has to defend their beliefs or opinions, the more they in turn believe it to be true. He implies that people naturally defend themselves and put up that wall is because of their ignorance. Further stating that, “most of us like to believe that our opinions have been formed over time by careful, rational consideration of facts and ideas, and that the decisions based on those opinions, therefore, have the ring of soundness and intelligence.” This is a valid point and is of great importance because as he later states “we often base our opinions on our beliefs, which can have an uneasy relationships...
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...MGMT 591 11/9/2014 Case Study: Building a Coalition Dr. Anne Hallcom Case Study: Building a Coalition for Woodson Foundation The Woodson Foundation, a large nonprofit social service agency, is teaming up with the public school system in Washington, D.C, to improve student outcomes. It appears the schools have problems with truancy, low student performance and crime. The teachers are discouraged to help students due to the disrespect and behavioral issues in the classroom. The turnover rate for the best teachers is high, they tend to leave and go to schools that aren’t as troubled (629). Part 1: Group Development The organization has five stages of group development. In the forming stage they have identified that there is a problem, now the plan is how to drive results. The first stage is bringing the plan forward and forming an executive development team. The team will consist of an HR representative from Woodson, the schools, and the NCPIE. This team’s responsibility is developing an operating plan for improving school performance. It is expected that representatives from both teams participate. Once this stage is finalized they can move on to the storming stage. The storming stage will consist of conflicts. This is an aggressive way to get to know each other a little better. Once the team has gotten over differences they start the norming stage. In this stage they realized although they have differences they still share things in common. The cohesiveness is...
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...In a world where teenagers are often cast aside as rebellious, disrespectful people who can’t do anything beneficial, media seems like the one place that we’re heard. Our generation lives in the age of technology and the avenues through which our opinions can be expressed are becoming greater each and every day. The media is one of the most influential ways to make a difference, and there truly is a way for everyone to express their feelings. There’s art, literature, videos, photography, giving each person a way to be artistically heard. Media gives an individual who may feel like a speck in the world, a bullhorn so they can be heard by millions. Media doesn’t just reach to the people who it was originally directed to, it can reach to many different groups of people and eventually the world, making it an empowering way for your opinion to be heard. It seems like whenever there is a political debate or the news is on, issues regarding schools are constantly brought up. School reform is something that our government is always trying to regulate, but are these politicians always the best qualified to make the decisions about schools? Students are never asked their opinions on the reforms and laws that are directly impacting their education and consequently their lives. Documentaries are frequently made regarding issues in schools, but they are from the point of view of people not directly involved in the issue, giving it an outside clear view on what the issue truly...
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...use this system to see where they all stand on the verdict. The old man decides to state his individuality because these factors: his beliefs, values and morals. This man has a belief that you cannot just send a young man off to possibly die without having talked about it first. He also made this decision based on the context on the situation. He knew some of the people in the room would be too scared to voice their own opinion. Others people’s belief though in the room are not in the right place. Some are more worried about a baseball game or money. Others are basing some things off their background such as the one of the other older gentlemen and his issues with his children. Their background experiences all reflect their actions and attitudes during the whole movie. This was also due to the perception of the situation they were in. Their attitudes and values were also a big influence on them during the movie. The old man that first voted not guilty was definitely a leader. He also had very high self-esteem because he was not afraid to voice his opinion. Many people went through intrapersonal communication during the movie, because of the examples and flaws the old man was sending to them to receive. Throughout the whole movie there is a lot of interaction between most of the characters that are strong from the beginning. One man, after another vote, changed his decision...
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...Initiator/Contributor Contributes ideas and suggestions; proposes solutions and decisions; proposes new ideas or states old ideas in a novel fashion. 2. Information Seeker Asks for clarification of comments in terms of their factual adequacy; asks for information or facts relevant to the problem; suggests information is needed before making decisions. 3. Information Giver Offers facts or generalizations that may relate to the group’s task. 4. Opinion Seeker Asks for clarification of opinions made by other members of the group and asks how people in the group feel. 5. Opinion Giver States beliefs or opinions having to do with suggestions made; indicates what the group’s attitude should be. 6. Elaborator/Clarifier Elaborates ideas and other contributions; offers rationales for suggestions; tries to deduce how an idea or suggestion would work if adopted by the group. 7. Coordinator Clarifies the relationships among information, opinions, and ideas or suggests an integration of the information, opinions, and ideas of subgroups. 8. Diagnostician Indicates what the problems are. 9. Orienter/Summarizer Summarizes what has taken place; points out departures from agreed-on goals; tries to bring the group back to the central issues; raises questions about the direction in which the group is heading. 10. Energizer Prods the group to action. 11. Procedure Developer Handles routine tasks such as seating arrangements, obtaining...
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...MKT420 HW1 Article Summary Omar Salim AL-Ghamdi 201182370 The article: Why Customer Satisfaction Still Matters How attitudes, opinions and beliefs come together to form the basis for brand loyalty Perhaps the most disruptive of ideas to hit the market research community in the past several years has been the notion of ditching the long relied upon “customer satisfaction” model that researchers have leaned so heavily upon for years. A wave of recent methodological research has suggested that our five-point, Likert-scaled question “How satisfied were you with your experience?” no longer cuts it. It just doesn’t do an adequate job of predicting future customer spend. This attack has principally been led by proponents of the Net Promoter Score (NPS) method, which argues that it’s not satisfaction that matters, but rather, loyalty. According to studies by NPS architect Satmetrix, utilizing the assigned loyalty metric of how likely a customer is to recommend a brand or product produces predictive models that do a significantly stronger job of forecasting future brand spend than simply asking how satisfied customers were with their experience. As they rightfully argue, plenty of customers will leave a store completely satisfied with their experience, yet remain entirely unlikely to return based upon an abundance of variables that satisfaction models can’t account for. This results in retailers and service providers who sit befuddled in conference rooms across...
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...Preguntas ¿De qué trata el artículo? • de que los que los ejecutivos no están haciendo su mejor esfuerzo para comunicar la estrategia de su empresa a través de la organización; no están siendo sinceros con los trabajadores lo cual afecta su desempeño. La importancia de la organización de una empresa afecta mucho en el éxito de esta. Tomar en cuenta a los empleados, hacer conversaciones y darles a conocer su empresa como misión, visión, etc.. garantiza un buen desempeño en su trabajo. Al parecer, la mayoría de las organizaciones no hacen una buena labor de comunicación. ¿Por qué crees que esto suceda?; ¿qué ideas sugieres para revertir lo anterior? • No se han dado cuenta de la importancia y se enfocan más en otras cuestiones. Sugiero hacer hincapié en este punto para que las empresas lo tomen en cuenta y hagan al respecto, es decir, tomen mas en cuenta a sus empleado para que estos les den los resultados que desea la empresa. Describe en tus propias palabras las conclusiones que aporta Halley Bock. • Se tiene que platicar con los empleados de las empresas y crear relaciones entre ellos, hacer que se conozcan todos para así generar una gran fuerza de trabajo. Los líderes deben invitar a los empleados a ser parte de la ejecución de la misión y la estrategia de la organización. Crear programas de reconocimiento o compromiso de recompensar a los empleados que quieren reconocer. Describe en tus propias palabras lo que sería un buen programa de comunicación. • Crear lazos...
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