John Addis

John Lindsey Addis (? – ?) is an engineer who worked for Tektronix (now retired).

Tek products

• designed the 1A7 (not the 1A7A, which was designed by Thor Hallen and is electrically similar to the 7A22). The 1A7 was Addis' first design at Tektronix.
• designed the 7A11 amplifier
• designed the 067-0681-01 pulse generator / calibration fixture
• designed the 155-0078-xx (M84) amplifier chip
• with Wink Gross, co-designed the vertical amplifier for the 485 (Ref 1)
• responsible for vertical system in the 7104
• with Wink Gross, co-designed the hybrid amplifiers for the 7104 (Ref 1) - 155-0173-00, 155-0175-00, 155-0076-00, 155-0180-00, 155-0181-00
• M377 preamplifier IC for 11000-series scopes (Ref 2, Ref 1)

Products by John Addis

Manufacturer	Model	Description	Designers	Introduced
Tektronix	067-0681-01	Pulse Generator	John Addis	(?)
Tektronix	067-0518-00	Calibration Fixture	John Addis	(?)
Tektronix	067-0594-00	Harmonic Generator	John Addis	(?)
Preamble Instruments	Preamble DA1855	100 MHz differential amplifier	John Addis	(?)
Tektronix	1A7	Differential amplifier	John Addis	1965
Tektronix	10A2A	100 MHz dual channel amplifier plugin	John Addis	1967
Tektronix	7A11	250 MHz FET-probe amplifier	John Addis • Ron Peltola • Glenn Bateman	1969
Tektronix	485	350 MHz portable scope	John Addis • Wink Gross • Gene Andrews • Glenn Bateman • Ron Peltola • Bob Firth • Murlan Kaufman • Bob White • Keith Taylor • Dick Troberg	1972
Tektronix	7A29	1 GHz amplifier	John Addis • Val Garuts	1978
Tektronix	7104	1 GHz mainframe with MCP CRT	Val Garuts • Gene Andrews • Hans Springer • John Addis • Wink Gross • Art Metz • Aris Silzars • Conrad Odenthal • Dave Morgan	1978
Tektronix	R7103	1 GHz non-storage mainframe	Val Garuts • Gene Andrews • Hans Springer • John Addis • Wink Gross • Art Metz • Aris Silzars • Conrad Odenthal • Dave Morgan	1985
Tektronix	7A29P	1 GHz programmable amplifier	John Addis	1988

Components by John Addis

Model	Class	Description	Designers	Used in
155-0076-00	Monolithic integrated circuit	input protection and probe logic	John Addis • Wink Gross	465 • 485 • 7A29 • 7A29P • 11A52 • 11A71 • 11A72 • SCD1000
155-0078-00	Monolithic integrated circuit	broadband amplifier	John Addis	464 • 465 • 466 • 468 • 475 • 475A • 475M • 485 • 7834 • 7844 • 7854 • 7904 • R7903 • R7912 • 7912AD • 7912HB • 7104 • 7A16A • 7A16P • 7A24 • 7A26 • 7A42 • 067-0587-01 • 067-0680-00 • AM503 • PG502 • PG508 • DC510 • DC5010 • FG5010
155-0173-00	Hybrid integrated circuit	vertical channel switch	John Addis • Wink Gross	7104 • R7103 • 7904A • 7934 • EG&G N-AM-173A
155-0175-00	Monolithic integrated circuit	broadband amplifier	John Addis • Wink Gross • Carl Battjes	7904A • 7912HB • 7934 • 7104 • R7103 • 7A29 • 7A29P • 7F10 • 067-0587-02 • 067-0587-10 • 11A71 • SCD1000 • EG&G N-AM-173A
155-0180-00	Hybrid integrated circuit	fast input protection	John Addis • Wink Gross	7A29 • 7A29P • 7F10 • 11A71
155-0181-00	Hybrid integrated circuit	input amplifier	John Addis • Wink Gross	7A29 • 7A29P • 7F10 • 11A71
155-0273-00	Monolithic integrated circuit	broadband vertical amplifier	John Addis	2220 • 2221 • 2230 • 2232
155-0274-00	Monolithic integrated circuit	broadband vertical amplifier	John Addis	2220 • 2221 • 2230
165-2456-00	Hybrid integrated circuit	amplifier	John Addis	AM503A • AM503B
M377	Monolithic integrated circuit	amplifier	John Addis	11A16 • 11A32 • 11A33 • 11A34 • 11A52 • 2245 • 2245A • 2247 • 2247A • 2252 • TDS410 • TDS420 • TDS460 • TDS520D • TDS540D • TDS580D • TDS680C • TDS684C • TDS714L • TDS724D • TDS754D • TDS784D
M474	Monolithic integrated circuit	amplifier	John Addis • Ivan John Cousins	11A32 • 11A34
M694	Monolithic integrated circuit	amplifier	John Addis	165-2456-00
M753	Monolithic integrated circuit	buffer amplifier	John Addis	H2462
M777	Monolithic integrated circuit	amplifier	John Addis • Bob Woolhiser • Rich Huard	H2462

Patents

• US Patent 3,582,807 Amplifier Gain Control Circuit Including Diode Bridge
• US Patent 3,710,270 Linear Gain Control
• US Patent 3,906,344 Oscilloscope having selectable input impedances
• US Patent 4,132,958 Feedbeside correction circuit for an amplifier
• US Patent 4,390,852 Buffer Amplifier
• US Patent 4,551,636 Wide bandwidth signal coupling circuit having a variable voltage-level shift from input to output
• US Patent 4,647,889 Rotary control having variable detents
• US Patent 4,667,146 Voltage-controlled push-pull current source
• US Patent 4,704,558 Method and apparatus for automatic oscilloscope calibration
• US Patent 4,713,627 Active filter with bootstrapping
• US Patent 4,714,896 Precision differential amplifier having fast overdrive recovery
• US Patent 4,725,790 Broadband DC level shift circuit with feedback
• US Patent 4,731,588 Gain selectable amplifier with resonance compensation (John Addis, Clifford E. Baker, Pat Quinn)
• US Patent 4,731,693 Connection apparatus for integrated circuit
• US Patent 5,075,636 Differential amplifier with fast overdrive recovery

Links

• John Addis, Good Engineering and Fast Vertical Amplifiers, in Jim Williams (Ed.), Analog Circuit Design: Art, Science and Personalities (1991), p.114 (Ref 1)
• P.Starič, E. Margan: Wideband Amplifiers (Ref. 2)
• A Tektronix oscilloscope that moved faster than light? The Oregonian, 23 Sep 2011. (Original no longer accessible, link via archive.org.), and the paper referred to in that article, Kirk T. McDonald, Radiation from a Superluminal Source

Photos

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  John Addis and Barrie Gilbert

• 

  Zorana Starič and John Addis

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  John Addis fixing a 547