Wideband amplifier circuit having automatic gain and offset voltage control
US5218320A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1992 |
| Grant date | Jun 8, 1993 |
| Priority date | — |
| Expiry date | Jun 4, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/3036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A wideband amplifier circuit having automatic offset voltage and gain control, the circuit comprising a main amplifier chain, a negative feedback loop for controlling gain, and a negative feedback loop for controlling and cancelling any possible offset voltage at its output, said main amplifier chain including a gain control amplifier block having a gain control input connected to the gain control negative feedback loop; wherein the gain control amplifier block is preceded in the main chain by a symmetrizer-adder block of fixed gain having a first input constituting the input of the amplifier circuit and a second input connected to the negative feedback loop for controlling and cancelling any possible offset voltage at the output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.