Bruce Hofer: Difference between revisions
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{{Person | {{Person | ||
|Names=Bruce Edward Hofer | |Names=Bruce Edward Hofer | ||
|Birth date= | |Birth date=1948 | ||
|Birth place= | |Birth place=Portland | ||
|Death date= | |Death date= | ||
|Death place= | |Death place= | ||
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After graduading in in Electrical Engineering in 1970, he joined Tek fulltime, working on the [[7000-series scopes|7000 series]]. | After graduading in in Electrical Engineering in 1970, he joined Tek fulltime, working on the [[7000-series scopes|7000 series]]. | ||
Hofer worked on | Hofer worked on 7000-series time base design, partly with [[Art Metz]], [[Les Larson]]. | ||
He later switched to audio, designing low distortion oscillators and harmonic distortion measuring equipment (lead engineer on the [[SG505]] audio oscillator and the [[AA501]] distortion analyzer, and [[TM5000]] plugins). | He later switched to audio, designing low distortion oscillators and harmonic distortion measuring equipment (lead engineer on the [[SG505]] audio oscillator and the [[AA501]] distortion analyzer, and [[TM5000]] plugins). | ||
Revision as of 14:20, 15 May 2023
Bruce Edward Hofer (b. 1948 in Portland – ?) worked as an assistant in the Lab Instruments division of Tektronix while studying at Oregon State University. After graduading in in Electrical Engineering in 1970, he joined Tek fulltime, working on the 7000 series.
Hofer worked on 7000-series time base design, partly with Art Metz, Les Larson.
He later switched to audio, designing low distortion oscillators and harmonic distortion measuring equipment (lead engineer on the SG505 audio oscillator and the AA501 distortion analyzer, and TM5000 plugins).
Unable to convince Tek management there was a market for this, in 1984 Bruce quit and founded Audio Precision with Bob Metzler, Richard Cabot, and Robert Wright.
Audio Precision became the world standard for audio manufacturers. Bruce became majority owner of AP.
Hofer also founded Preamble Instruments.
Links
- View From The Top: Bruce Hofer, Audio Precision
- My Years at Tektronix by Bruce Hofer @ vintagetek.org
Products by Bruce Hofer
Components by Bruce Hofer
Patents by Bruce Hofer
| Page | Office | Number | Title | Inventors | Company | Filing date | Grant date |
|---|---|---|---|---|---|---|---|
| Patent US 3843873A | US | 3843873A | Counter having selective direction and variable rate control | Bob Beville • Bruce Hofer • Bill Peek | Tektronix Inc | 1972-09-19 | 1974-10-22 |
| Patent US 4009399A | US | 4009399A | Gated ramp generator | Bruce Hofer | Tektronix Inc | 1976-02-05 | 1977-02-22 |
| Patent US 4132958A | US | 4132958A | Feedbeside correction circuit for an amplifier | John Addis • Bruce Hofer | Tektronix Inc | 1977-10-31 | 1979-01-02 |
| Patent US 4296381A | US | 4296381A | Distortion reduction circuit for an inverting feedback amplifier | Bruce Hofer | Tektronix Inc | 1979-10-01 | 1981-10-20 |
| Patent US 4302738A | US | 4302738A | Noise rejection circuitry for a frequency discriminator | Richard Cabot • Bruce Hofer | Tektronix Inc | 1980-04-11 | 1981-11-24 |
| Patent US 4382233A | US | 4382233A | Multiple-feedback path filter | Bruce Hofer | Tektronix Inc | 1980-11-12 | 1983-05-03 |
| Patent US 4344029A | US | 4344029A | Automatic IM distortion test selector | Richard Cabot • Bruce Hofer | Tektronix Inc | 1981-05-11 | 1982-08-10 |
| Patent US 4560958A | US | 4560958A | State variable oscillator having improved rejection of leveler-induced distortion | Bruce Hofer | Tektronix Inc | 1984-02-24 | 1985-12-24 |
| Patent US 4563652A | US | 4563652A | Dual-stage filter with feedback | Bruce Hofer | Audio Precision | 1985-04-12 | 1986-01-07 |
| Patent US 4614914A | US | 4614914A | Low-distortion transformer-coupled circuit | Bruce Hofer | Audio Precision | 1985-04-12 | 1986-09-30 |
| Patent US 4811395A | US | 4811395A | Two-tone test signal method for BTSC calibration | Edward J. Cleary Jr. • Bruce Hofer | Tektronix Inc | 1987-10-08 | 1989-03-07 |
| Patent US 5336989A | US | 5336989A | AC mains test apparatus and method | Bruce Hofer | Audio Precision | 1991-09-19 | 1994-08-09 |
| Patent US 7268711B1 | US | 7268711B1 | Method and circuit for amplitude compensation in a digital-to-analog converter | Bruce Hofer | Audio Precision | 2006-03-24 | 2007-09-11 |