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CHAPTER 1 Review of Feedback Systems Introduction and Some Early History of Feedback Control Invention of the Negative Feedback Amplifier Control System Basics Loop Transmission and Disturbance Rejection Stability Routh Stability Criterion The Phase Margin and Gain Margin Tests Relationship Between Damping Ratio and Phase Margin Loop Compensation Techniques¡XLead and Lag Networks Parenthetical Comment on Some Interesting Feedback Loops Example 1.1: Gain of +1 amplifier Example 1.2: Gain of +10 amplifier Example 1.3: Integral control of reactive load Example 1.4: Photodiode amplifier Example 1.5: MOSFET current source Example 1.6: Maglev example Appendix: MATLAB Scripts MATLAB script for gain of +1 and +10 amplifiers References
Chapter 2 My Approach to Feedback Loop Design My Approach to Design What Is a V/I Source? An Ideal V/I Source Designing a V/I Source Capacitive Load Compensation Model to Investigate Overshoot Back To The Frequency Domain Range of Compensation Required Phase Margin Approach to Loop Compensation LTX Device Power Source (DPS) Performance *Summary of My Method
CHAPTER 3 Basic Operational Amplifier Topologies and a Case Study Basic Device Operation Example 3.1: Case study: Design, analysis and simulation of a discrete operational amplifier Brief Review of LM741 Op-Amp Schematic Some Real-World Limitations of Operational Amplifiers Voltage offset Example 3.2: Op-amp driving capacitive load References
CHAPTER 4 Finding the Perfect Op Amp for Your Perfect Circuit Choose the Technology Wisely Using these Fundamentals Ampliﬁer Design Pitfalls References
CHAPTER 5 Review of Passive Components and a Case Study in PC Board Layout Resistors Comments on Surface-Mount Resistors Comments on Resistor Types Capacitors Inductors Discussion of Printed-Circuit Board Layout Issues Approximate Inductance of a PC Board Trace Above a Ground Plane Example 5.1: Design case study¡Xhigh-speed semiconductor laser diode driver *References
CHAPTER 6 ANALOG LOWPASS FILTERS A Quick Introduction to Analog Filters Passive Filters "Normalization" and "De-normalization" Poles and Zero's Active Lowpass Filters First-Order Filter Section Sallen-Key Lowpass Filter Sallen-Key Roll-Off Deficiencies Denormalizing Sallen-Key Filter Designs State Variable Lowpass Filters Cauer and Inverse Chebyshev Active Filters Denormalizing State Variable or Biquad Designs Frequency Dependent Negative Resistance (FDNR) Filters Denormalization of FDNR Filters References *References
CHAPTER 7 HIGHPASS FILTERS Active Highpass Filters First-Order Filter Section Sample-and-Difference Circuit Sallen-Key Highpass Filter Using Lowpass Pole to Find Component Values Using Highpass Poles to Find Component Values Operational Ampliﬁer Requirements Denormalizing Sallen-Key or First-Order Designs State Variable Highpass Filters Cauer and Inverse Chebyshev Active Filters Denormalizing State Variable or Biquad Designs Gyrator Filters *References
CHAPTER 8 Noise ¡V The Three Categories: Device, Conducted and Emitted Deﬁnitions of Noise Speciﬁcations and Terms References
Chapter 9 How to Design Analog Circuits without a Computer or a Lot of Paper My Background Breaking Down a Circuit Equivalent Circuits Stock Parts Values RC Networks Stabilizing a Feedback Loop Circuit Impedance New Parts Breadboarding Testing How Much To Learn Settling Time Tester
CHAPTER 10 BANDPASS FILTERS Lowpass to Bandpass Transformation Passive Filters Formula for Passive Bandpass Filter Denormalization Active Bandpass Filters Bandpass Poles and Zeroes Bandpass Filter Midband Gain Multiple Feedback Bandpass Filter Dual Ampliﬁer Bandpass (DABP) Filter Denormalizing DABP Active Filter Designs State Variable Bandpass Filters Denormalization of State Variable Design Cauer and Inverse Chebyshev Active Filters Denormalizing Biquad Designs References
CHAPTER 11 Bandstop (Notch) Filters Passive Filters Formula for Passive Bandstop Filter Denormalization Active Bandstop Filters Bandstop Poles and Zeroes The Twin Tee Bandstop Filter Denormalization of Twin Tee Notch Filter Bandstop Using Multiple Feedback Bandpass Section Denormalization of Bandstop Design Using MFBP Section Bandstop Using Dual Ampliﬁer Bandpass (DABP) Section Denormalization of Bandstop Design Using DABP Section State Variable Bandstop Filters Denormalization of Bandstop State Variable Filter Section Cauer and Inverse Chebyshev Active Filters Denormalization of Bandstop Biquad Filter Section *References
Chapter 12 Current¡VFeedback Amplifiersƒn The Conventional Op Amp Gain¡VBandwidth Trade-off Slew-Rate Limiting The Current¡VFeedback Amplifier No Gain¡VBandwidth Trade-off Absence of Slew-Rate Limiting Second-Order Effects CF Application Considerations CF Amp Integrators Stray Input¡VCapacitance Compensation Noise in CF Amp Circuits Low Distortion for Fast Sine Waves Using CF Amps Drawbacks of Current Feedback Amplifiers, versus Conventional Op-amps. References
CHAPTER 13 The Basics Behind Analog-to-Digital Converters The Key Speciﬁcations of Your ADC Delta-sigma (∆−£U) Converters Decimation Filter Conclusion *References
CHAPTER 14 The Right ADC for the Right Application Classes of Input Signals Temperature Sensor Signal Chains Using an RTD for Temperature Sensing: SAR Converter or Delta-Sigma Solution? The RTD Current Excitation Circuit for the SAR Circuit RTD Signal Conditioning Path Using the SAR ADC Is the SAR ADC Right for this Temperature Sensing Application? RTD Signal Conditioning Path Using the Delta-sigma ADC Is the Delta-sigma ADC Right for this Temperature Sensing Application? Measuring Pressure: SAR Converter or Delta-sigma Solution? The Piezoresistive Pressure Sensor The Pressure Sensor Signal Conditioning Path Using a SAR ADC Pressure Sensor Signal Conditioning Path Using a Delta-sigma ADC Photodiode Applications Photosensing Signal Conditioning Path Using a SAR ADC Photosensing Signal Conditioning Path Using a Delta-sigma ADC Motor Control Solutions Conclusion References
CHAPTER 15 Working the Analog Problem From the Digital Domain Pulse Width Modulators (PWM) Used as a Digital-to-Analog Converter Looking At This Reference in the Time Domain Changing This Digital Signal to Analog Deﬁning Your Analog Low-Pass Filter for your PWM-DAC Pulling the Time Domain and Frequency Domain Together Using the Comparator for Analog Conversions Input Range of a Comparator (VIN+ and VIN¡V) Input Hysteresis Window Comparator Combining the Comparator with a Timer Using the Timer and Comparator to Build a Delta-Sigma A/D Converter Delta-Sigma Theory The Controller Implementation Error Analysis of this Delta-sigma A/D Converter Implemented with a Controller RDS ON Error RA0 Port Leakage Current Nonsymmetrical Output Port (RA3) Voltage Reference Other Input Ranges Input Range of 2 V to 3 V Input Range of 10 V to 15 V Input Range of ¡Ó500 mV Conclusion References
Chapter 16 What¡¦s All This Error Budget Stuff, Anyhow?
Chapter 17 What's All This VBE Stuff, Anyhow?
Chapter 18 The Zoo Circuit
APPENDIX A Analog-to-Digital Converter Speciﬁcation Deﬁnitions and Formulas
Appendix B Capacitor Coefficients for Lowpass Sallen-Key Filters
Newnes has worked with Robert Pease, a leader in the field of analog design to select the very best design-specific material that we have to offer. The Newnes portfolio has always been know for its practical no nonsense approach and our design content is in keeping with that tradition. This material has been chosen based on its timeliness and timelessness. Designers will find inspiration between these covers highlighting basic design concepts that can be adapted to today's hottest technology as well as design material specific to what is happening in the field today. As an added bonus the editor of this reference tells you why this is important material to have on hand at all times. A library must for any design engineers in these fields.
Hand-picked content selected by analog design legend Robert Pease Proven best design practices for op amps, feedback loops, and all types of filters *Case histories and design examples get you off and running on your current project
Analog designers and engineers
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- © Newnes 2008
- 12th May 2008
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"The book provides good background material on topics like feedback control and stability, and it presents the basics of op-amp topologies and data conversion." - Rick Nelson, Test & Measurement World.
Pease attended Mt. Hermon School, and graduated from MIT in 1961 with a BSEE. He worked at Philbrick Researches up to 1975 and designed many OpAmps and Analog Computing Modules.
Pease joined National Semiconductor in 1976. He has designed about 24 analog ICs including power regulators, voltage references, and temp sensors. He has written 65+ magazine articles and holds about 21 US patents. Pease is the self-declared Czar of Bandgaps since 1986. He enjoys hiking and trekking in Nepal, and ferroequinology. His position at NSC is Staff Scientist. He is a Senior Member of the IEEE.
Pease wrote the definitive book, TROUBLESHOOTING ANALOG CIRCUITS, now in its 18th printing. It has been translated into French, German, Dutch, Russian, and Polish. Pease is a columnist in Electronic Design magazine, with over 240 columns published. The column, PEASE PORRIDGE, covers a wide range of technical topics.
Pease also has posted many technical and semi-technical items on his main web-site: http://www.national.com/rap Many of Pease's recent columns are accessible there.
Pease was inducted into the E.E. Hall Of Fame in 2002. Refer to: http://www.elecdesign.com/Articles/Index.cfm?ArticleID=17269&Extension=pdf See Pease's other web site at http://www.transtronix.com
National Semiconductor Corporation