Patent US 4146844A
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| Patent number | US 4146844A (click link for details and documents via Google Patents) |
|---|---|
| Title | Feed-forward amplifier |
| Inventors | Pat Quinn |
| Company | Tektronix Inc |
| Filing date | 1977-10-31 |
| Grant date | 1979-03-27 |
Cited By:
| Patent | Title | Inventors | Assignee | Granted |
|---|---|---|---|---|
| Patent EP 0110614 | Current-limiting mechanism for a precision differential amplifier | Art Metz • Ken Schlotzhauer | Tektronix Inc | 1987-01-14 |
| Patent US 4322688A | Cascode feed-forward amplifier | Ken Schlotzhauer • Art Metz | Tektronix Inc | 1982-03-30 |
| Patent US 4528517A | Overdrive thermal distortion compensation for a Quinn cascomp amplifier | Ken Schlotzhauer | Tektronix Inc | 1985-07-09 |
Related products:
| Manufacturer | Model | Description | Introduced | Designers |
|---|---|---|---|---|
| Tektronix | 2465 | Portable 150/300 MHz 4-ch scope | 1984 | Art Metz • Ken Schlotzhauer • Walt Ainsworth • Wink Gross • Mike Metcalf • Marv LaVoie |
Documents referencing Patent US 4146844A:
| Document | Title | Authors | Year | Links |
|---|---|---|---|---|
| Technology Report October 1979.pdf | Patent Received: 4,146,844 Feed-Forward Amplifier | Pat Quinn | 1979 | Cascomp • Patent US 4146844A |
This patent describes the so-called "cascomp" amplifier − see John Addis, Good Engineering and Fast Vertical Amplifiers, in Jim Williams (Ed.), Analog Circuit Design: Art, Science and Personalities (1991), p.107+
According to Addis,
[the circuit] was used extensively in the 2465 to reduce the power requirements by increasing linearity for a given standing current.
See also
- P. A. Quinn, A cascode amplifier nonlinearity correction technique, in IEEE Int. Solid-State Circuits Conference., New York, NY, 1981, pp. 188-272.
- S. Simpkins and W. Gross, Cascomp feedforward error correction in high speed amplifier design, in IEEE J. Solid-State Circuits Conference., vol. sc-18, no. 6 pp. 762-764, Dec. 1983
- K.Schlotzhauer and A. Metz, Cascode feed-forward amplifier, U.S. Patent 4 322 688
- K.Schlotzhauer, Overdrive thermal distortion compensation for a Quinn cascomp amplifier, U.S. Patent 4 528 517
- H. Jull, T. Balsom, J. Scott, Cascomp BJT Amplifier vs. traditional configurations (2012)
- Re-issue: Patent US RE31545E
Documents Referencing Cascomp
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Technology Report October 1979.pdf | Article | Patent Received: 4,146,844 Feed-Forward Amplifier | Pat Quinn | 1979 | Cascomp • Patent US 4146844A |
| Electronic-Engineering-Aug-Sept-1988-Versatile-Analogue-Chip-John-Addis.pdf | Article | Versatile Analogue Chip for Oscilloscope Plug-ins | John Addis | 1988 | M377 • 11A32 • 11A33 • 11A34 • 11A52 • Cascomp • Overdrive • Thermals • Gilbert multiplier • Pat Quinn • Gary Polhemus • Art Metz |