Comparator switched squelch rectifier
US5303405A · kind A · utility
5Cited by
13References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1991 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Sep 3, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/344
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A squelch circuit (200) having an input is provided including a programmable high pass filter (206) for filtering the input signal to produce a filtered signal. The filtered signal is rectified via a differential rectifier (201) to produce a rectified signal. The squelch circuit (200) also includes a threshold comparator (323) coupled to the differential rectifier (201) for sensing when the rectified signal exceeds a squelch threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.