Filter overshoot control circuitry
US4737725A · kind A · utility
3Cited by
1References
9Claims
0Family size
Inventor
Key dates
| Filing date | Jun 2, 1987 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Jun 2, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G11/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Presented is a control circuit for controlling, i.e., preventing, filter overshoot in stereophonic broadcast equipment, particularly stereophonic FM broadcasting equipment. The circuitry includes an input clipper cooperating with a phase-lag network and a second clipper to condition the primary information signal to anticipate filter overshoot and counteract it through cooperation of comparator and summing circuits that add back into the amplitude-limited signal the clipped off components that exceed in amplitude the amplitude-limited signal, but which are added back in opposite phase.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.