Programmable gain feedback amplifier
US4551685A · kind A · utility
Inventor
Key dates
| Filing date | Oct 25, 1982 |
| Grant date | Nov 5, 1985 |
| Priority date | — |
| Expiry date | Oct 25, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G1/0088
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The disclosed invention is a programmable gain feedback amplifier consisting of a high gain (op-amp) amplifier, feedback elements and fuse networks in the feedback and/or input paths, a decoding circuit for receiving an input programming command signal, and thereby selectively blowing (or opening) the proper fuses to establish the desired signal attenuation in said networks. After programming, the gain of the amplifier circuit is related to the total attenuation of the network(s), is permanently set, and does not require the programming signal to be continuously applied. Embodiments are described which are compatible with monolithic microelectronic fabrication techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.