Analogue Design 

Kevin Aylward B.Sc.  

Analog I.C. Design Engineer


Introduction

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.


Tutorial Papers

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

Laplace Transforms

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 faster than cascode compensation, contrary to the standard literature

Oscillator Loop Gain - Common Emitter and Emitter follower oscillators are, essentially, identical

Oversampling 

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

Theoretical Papers

Power - Accuracy - Frequency Limit (PAFL) of CMOS Amplifiers

Power - Accuracy - Frequency Limit (PAFL) of Bipolar Amplifiers

Widlar Current Source - Closed Form Solution

Analog Tape Bias


Spice Related Papers

XSpice Cored Transformers, Inductors and Tables

XSpice State Machine


Miscellaneous Schematics

Very Low Voltage Bandgap

Very Low Distortion Amp 1

Very Low Distortion Amp 2


PDF Versions

1v45nmopamp.pdf
bipolardesign1.pdf
bipolardesign2.pdf
bipolardesign3.pdf
currentfeedbackmyth.pdf
DistortionFeedback.pdf
diff_osc.pdf
feedbackstability.pdf
FlickerNullification.pdf
laplace.pdf
lna.pdf
LTV.pdf
noise_shaping.pdf
opamp_miller.pdf
osc_loop_gain.pdf
oversampling.pdf
OrthogonalPerturbation.pdf
PhaseNoiseOscillators.pdf
PhaseNoiseTutorial.pdf
PTAT.pdf
SigmaDelta.pdf
tapebias.pdf
voltagecontrolledbipolar.pdf
widlarlambert.pdf


Comments on these papers, as are any corrections, are welcome:

Email:  kevinExractAndRemove@kevinaylward.co.uk

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Links

Kevin Aylward


Kevin Aylward 2015 
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The information on the page may be reproduced 
providing that this source is acknowledged. 
Website last modified 18th April 2015 

www.kevinaylward.co.uk