Electrically variable impedance circuit with feedback compensation
US4339677A · kind A · utility
13Cited by
2References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 21, 1979 |
| Grant date | Jul 13, 1982 |
| Priority date | — |
| Expiry date | Dec 21, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/24
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A variable impedance circuit in which nonlinearities caused by the application of a signal are substantially reduced by the use of a feedback circuit for cancelling out the added input current due to the application of the input signal. By using a feedback circuit to obtain the desired improvement in linearity, the gain of the feedback loop can be tailored to obtain the necessary impedance range and output swing in a circuit capable of operating at relatively low power supply voltages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.