Amplifier with controlled output impedance
US5121080A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1990 |
| Grant date | Jun 9, 1992 |
| Priority date | — |
| Expiry date | Dec 21, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/45071
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An amplifier with controlled output impedance has a first output connected to the inverting input of the amplifier, and a second output, which forms the output of the amplifier, connected through a feedback conductance to the inverting input of the amplifier. A input conductance is connected from the inverting input to ground, and the input signal is connected to the positive input of the amplifier. The first and second outputs are provided by first and second current output stages. The currents provided by the first and second output stages are proportional to each other by a predetermined ratio. By proper selection of this predetermined ratio and the feedback and input conductances the desired output impedance and overall gain of the amplifier into a given load can be achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.