Circuit for dynamic control of phase shift
US3969682A · kind A · utility
89Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1974 |
| Grant date | Jul 13, 1976 |
| Priority date | — |
| Expiry date | Oct 21, 1994 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H11/20
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A current controlled variable transconductance amplifier having a differential input stage and a current source output stage is employed with negative feedback, either through a buffer amplifier or directly, to provide various all-pass, low-pass or high-pass filter configurations, each with controlled bias current to the differential input stage for current control of the variable transconductance amplifier to provide dynamic control of phase shift and filter cutoff frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.