Papers, Articles, & Talks

Updated: 20 June 2016

A list of the papers and articles I have published in Wireless World/Electronics World, Elektor, the JAES, and Jan Didden's Linear Audio. Constructional notes and pictures are available for some project-based articles.

WIRELESS WORLD/ELECTRONICS WORLD

TITLE
SUBJECT
PUBLISHED
NOTES
PICTURE
"A Compressor/limiter" FET-based compressor Dec 1975
"An Advanced Preamplifier" Bipolar discrete op-amps: MRP1 Nov 1976 NOTES PICTURE
"Additions to Advanced Preamplifier" Minor add-ons to MRP1. Oct 1977
"A High-Performance Preamp" Bipolar conventional: MRP4 Feb 1979 NOTES PICTURE
"A Precision Preamplifier" 5532 op-amps: The MRP10. Oct 1983 NOTES PICTURE
"Moving-Coil Head Amplifier" Bipolar/opamp hybrid, v low THD Dec 1987
Science & Subjectivism See "Pseudoscience" July 1988
Sound MOSFET Design" Hybrid BJT/FET amplifier output Sept 1990
"Inside Mixing Consoles" Some secrets of mixer design Apr 1991
Distortion In Power Amplifiers 1 The sources of distortion Aug 1993
Distortion In Power Amplifiers 2 The input stage Sep 1993
Distortion In Power Amplifiers 3 The voltage-amplifier stage Oct 1993
Distortion In Power Amplifiers 4 Output stages 1 Nov 1993
Distortion In Power Amplifiers 5 Output stages 2 Dec 1993
Distortion In Power Amplifiers 6 The remaining distortions Jan 1994
Distortion In Power Amplifiers 7 Compensation. A Class-B design Feb 1994 NOTES PICTURE
Distortion In Power Amplifiers 8 A Class-A design example Mar 1994
Common-Emitter Amps Deep matters of topology. July 1994
"High-speed Audio Power" Fast amplifiers & slew-rate. Sept 1994
"Distortion Off The Rails" Power Supply Rejection Mar 1995
The Linearity Competition FETs are less linear than BJTs May 1995
"Trimodal Audio Power" Part 1 ClassA/AB/B power amp June 1995 NOTES PICTURE
"Trimodal Audio Power" Part 2 ClassA/AB/B power amp July 1995
Olsson 2-stage Critique: I don't like it. Sept 1995
Thermal Dynamics Part 1 Bias temp compensation May 1996

Thermal Dynamics Part 2 & thermal simulation. June 1996
Precision Preamp '96 I 5532 op-amps: The MRP-11. Jul 1996 NOTES PICTURE
Precision Preamp '96 II ...the best preamp ever? Sep 1996
Thermal Dynamics Part 3 Variable tempco biasing. Oct 1996
Night Thoughts on Crossover Distn. Dark thoughts indeed Nov 1996
Load-Invariant power amp Low THD into 3 or 4 Ohms Jan 1997 NOTES PCB PIC
"Overload Matters" RIAA preamp overload Feb 1997
Balanced line inputs and outputs I The many variations on them Apr 1997
Balanced line inputs and outputs II Plus grounding info May 1997
Audio power interface I: amplifiers Output networks etc. Sept 1997
Audio power interface II: cables How they really work. Oct 1997
Audio power interface III: speakers What they do to amps. Nov 1997
Distortion Residuals. Identifying distortions Jan 1998 p32
Excess speaker currents. They are not so mysterious Feb 1998 p98
Class Distinction Amplifier classification scheme Mar 1999
Muting Relays Controlling them intelligently July 1999
Cool Audio Power Power partition diagrams. Aug 1999
Audio Power Power partition: reactive loads Dec 1999
Output Coil crosstalk How big a problem? Oct 2001
Class G amplifiers: Part 1 Save power... Dec 2001
Class G amplifiers: Part 2 ...but get low distortion Jan 2002
Class G Mode Indicator Lights if high rails used Feb 2002
Amplifier Input Currents A serious cause of distortion May 2003
Analogue Switching: Part 1 How to do it right... Jan 2004
Analogue Switching: Part 2 ...with low distortion Feb 2004
Class XD: a New Kind of Power Amplifier Crossover displacement technology Nov 2006

Between 2004 and 2006 EW decided to stop paying its authors, so I decided to stop writing for them.

ELEKTOR

TITLE
SUBJECT
PUBLISHED
"The 5532 OpAmplifier: Part 1" Paralleled 5532s for a power amp Oct 2010
"The 5532 OpAmplifier: Part 2" Paralleled 5532s for a power amp Nov 2010
"Preamplifier 2012: Part 1" The line input, tone-control, and volume section: MRP12 April 2012
"Preamplifier 2012: Part 2" MM and MC disc inputs: MRP12 May 2012
"Preamplifier 2012: Part 3" Level indicator and PSU: MRP12 June 2012

You can find Elektor here

LINEAR AUDIO

TITLE
SUBJECT
VOLUME
PUBLISHED
"Inclusive Compensation & Ultra-Low Distortion" Compensation including the output stage Volume 0 Sept 2010
"Self-Improvement for Capacitors" Linearity improving with use Volume 1 Apr 2011
"Low noise preamplifier" With variable-frequency tone controls Volume 5 April 2013
"Optimising RIAA realisation" Some RIAA networks are more economical than others Volume 7 Mar 2014
"The Devinyliser" Rumble filtering by stereo crossfeed Volume 11 April 2016

You can find Jan Didden's Linear Audio journal here

JOURNAL OF THE AUDIO ENGINEERING SOCIETY

TITLE
SUBJECT
PUBLISHED
"Ultra-Low Noise Amplifiers & Granularity Distortion" Proving "granularity distortion" does not exist by amplifying tiny signals Nov 1987
p907-915

LECTURES AND MASTERCLASSES
(Powerpoint presentations)

TITLE
LOCATION
DATE
Power Amplifier Design masterclass Amsterdam AES convention 20 May 2008
Active Crossover Design Burning Amp festival (San Francisco) 1 Oct 2011
Balanced Interconnects masterclass New York AES convention 20 Oct 2011
Thermal distortion in power amplifiers Warsaw AES convention 10 May 2015
The Devinyliser: rumble filtering by stereo crossfeed Paris AES convention 6 June 2016

These Powerpoint presentations can be downloaded from the front page of the Amplifier Institute.

TITLE	SUBJECT	PUBLISHED	NOTES	PICTURE
"A Compressor/limiter"	FET-based compressor	Dec 1975
"An Advanced Preamplifier"	Bipolar discrete op-amps: MRP1	Nov 1976	NOTES	PICTURE
"Additions to Advanced Preamplifier"	Minor add-ons to MRP1.	Oct 1977
"A High-Performance Preamp"	Bipolar conventional: MRP4	Feb 1979	NOTES	PICTURE
"A Precision Preamplifier"	5532 op-amps: The MRP10.	Oct 1983	NOTES	PICTURE
"Moving-Coil Head Amplifier"	Bipolar/opamp hybrid, v low THD	Dec 1987
Science & Subjectivism	See "Pseudoscience"	July 1988
Sound MOSFET Design"	Hybrid BJT/FET amplifier output	Sept 1990
"Inside Mixing Consoles"	Some secrets of mixer design	Apr 1991
Distortion In Power Amplifiers 1	The sources of distortion	Aug 1993
Distortion In Power Amplifiers 2	The input stage	Sep 1993
Distortion In Power Amplifiers 3	The voltage-amplifier stage	Oct 1993
Distortion In Power Amplifiers 4	Output stages 1	Nov 1993
Distortion In Power Amplifiers 5	Output stages 2	Dec 1993
Distortion In Power Amplifiers 6	The remaining distortions	Jan 1994
Distortion In Power Amplifiers 7	Compensation. A Class-B design	Feb 1994	NOTES	PICTURE
Distortion In Power Amplifiers 8	A Class-A design example	Mar 1994
Common-Emitter Amps	Deep matters of topology.	July 1994
"High-speed Audio Power"	Fast amplifiers & slew-rate.	Sept 1994
"Distortion Off The Rails"	Power Supply Rejection	Mar 1995
The Linearity Competition	FETs are less linear than BJTs	May 1995
"Trimodal Audio Power" Part 1	ClassA/AB/B power amp	June 1995	NOTES	PICTURE
"Trimodal Audio Power" Part 2	ClassA/AB/B power amp	July 1995
Olsson 2-stage	Critique: I don't like it.	Sept 1995
Thermal Dynamics Part 1	Bias temp compensation	May 1996
Thermal Dynamics Part 2	& thermal simulation.	June 1996
Precision Preamp '96 I	5532 op-amps: The MRP-11.	Jul 1996	NOTES	PICTURE
Precision Preamp '96 II	...the best preamp ever?	Sep 1996
Thermal Dynamics Part 3	Variable tempco biasing.	Oct 1996
Night Thoughts on Crossover Distn.	Dark thoughts indeed	Nov 1996
Load-Invariant power amp	Low THD into 3 or 4 Ohms	Jan 1997	NOTES	PCB PIC
"Overload Matters"	RIAA preamp overload	Feb 1997
Balanced line inputs and outputs I	The many variations on them	Apr 1997
Balanced line inputs and outputs II	Plus grounding info	May 1997
Audio power interface I: amplifiers	Output networks etc.	Sept 1997
Audio power interface II: cables	How they really work.	Oct 1997
Audio power interface III: speakers	What they do to amps.	Nov 1997
Distortion Residuals.	Identifying distortions	Jan 1998 p32
Excess speaker currents.	They are not so mysterious	Feb 1998 p98
Class Distinction	Amplifier classification scheme	Mar 1999
Muting Relays	Controlling them intelligently	July 1999
Cool Audio Power	Power partition diagrams.	Aug 1999
Audio Power	Power partition: reactive loads	Dec 1999
Output Coil crosstalk	How big a problem?	Oct 2001
Class G amplifiers: Part 1	Save power...	Dec 2001
Class G amplifiers: Part 2	...but get low distortion	Jan 2002
Class G Mode Indicator	Lights if high rails used	Feb 2002
Amplifier Input Currents	A serious cause of distortion	May 2003
Analogue Switching: Part 1	How to do it right...	Jan 2004
Analogue Switching: Part 2	...with low distortion	Feb 2004
Class XD: a New Kind of Power Amplifier	Crossover displacement technology	Nov 2006

TITLE	SUBJECT	PUBLISHED
"The 5532 OpAmplifier: Part 1"	Paralleled 5532s for a power amp	Oct 2010
"The 5532 OpAmplifier: Part 2"	Paralleled 5532s for a power amp	Nov 2010
"Preamplifier 2012: Part 1"	The line input, tone-control, and volume section: MRP12	April 2012
"Preamplifier 2012: Part 2"	MM and MC disc inputs: MRP12	May 2012
"Preamplifier 2012: Part 3"	Level indicator and PSU: MRP12	June 2012

TITLE	SUBJECT	VOLUME	PUBLISHED
"Inclusive Compensation & Ultra-Low Distortion"	Compensation including the output stage	Volume 0	Sept 2010
"Self-Improvement for Capacitors"	Linearity improving with use	Volume 1	Apr 2011
"Low noise preamplifier"	With variable-frequency tone controls	Volume 5	April 2013
"Optimising RIAA realisation"	Some RIAA networks are more economical than others	Volume 7	Mar 2014
"The Devinyliser"	Rumble filtering by stereo crossfeed	Volume 11	April 2016

TITLE	SUBJECT	PUBLISHED
"Ultra-Low Noise Amplifiers & Granularity Distortion"	Proving "granularity distortion" does not exist by amplifying tiny signals	Nov 1987 p907-915

TITLE	LOCATION	DATE
Power Amplifier Design masterclass	Amsterdam AES convention	20 May 2008
Active Crossover Design	Burning Amp festival (San Francisco)	1 Oct 2011
Balanced Interconnects masterclass	New York AES convention	20 Oct 2011
Thermal distortion in power amplifiers	Warsaw AES convention	10 May 2015
The Devinyliser: rumble filtering by stereo crossfeed	Paris AES convention	6 June 2016