Kevin Aylward B.Sc.
Analog I.C. Design Engineer
This web site is a collection of papers on analog design. It's an ongoing work, so please check back from time to time to find out if there have been any additions.
There are several papers that address some pretty blatant misconceptions and, quite frankly, fundamentally main stream false notions on various technologies and theory.
Bipolar Design Part 1 - The Basics
Bipolar Design Part 2 - Distortion
Bipolar Design Part 3 - Biasing
Current Feedback Myth - Voltage feedback amplifiers can be just as fast as current feedback amplifiers
CMOS Bandgap - Low noise, On point trim, high accuracy bandgap with no chopper.
Distortion With Feedback - More generalized than standard treatments, but a very simple approach
Feedback Stability - The only guaranteed way to make a small fortune, is to start with a large one, then lose some of it
LNA - Improved 10 GHz, R.F., Low Noise Amplifier Design Example
Mic Amp Design
Noise Shaping - Noise shaping is error correction, the shaping bit is just what comes out of the wash
Operational Amplifier Design 1 - Deep sub-micron 1V, 45nm, 90dB, 100MHz, 0.35ma, two stage operational amplifier design example
Operational Amplifier Design 2 - Miller compensation is not vastly inferior than cascode compensation, contrary to the standard literature
Oscillator Loop Gain - Common Emitter and Emitter follower oscillators are, essentially, identical
Phase Noise - The standard ISF Hajimiri-Lee approach is fundamentally incorrect
Proportional To Temperature Current Generator - How to reliably design a start-up circuit
Delta-Sigma ADC - The standard voltage mode description of noise shaping is fundamentally incorrect
Voltage Controlled Bipolar Transistor - Typical descriptions that the bipolar transistor is "current controlled" are fundamentally incorrect
General Design Techniques
Zero Power Startup Circuit
Power - Accuracy - Frequency Limit (PAFL) of CMOS Amplifiers
Power - Accuracy - Frequency Limit (PAFL) of Bipolar Amplifiers
Widlar Current Source - Closed Form Solution
Spice Related Papers
XSpice Cored Transformers, Inductors and Tables
XSpice State Machine
Very Low Voltage Bandgap
Very Low Distortion Amp 1
Very Low Distortion Amp 2
L'Hôpital's Rule derivation
Comments on these papers, as are any corrections, are welcome:
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Website last modified 30th April 2022