Interference suppression circuit for automobile radio receivers
US3995219A · kind A · utility
4Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 9, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | Jul 9, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/1018
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A pulse amplifier with its input across the power supply leads to an automobile radio receiver to be protected against pulse interference is used to operate a blanking gate interposed between the demodulator of the receiver and the low-frequency circuits thereof. One of the power supply leads is grounded to the vehicle body. A resistor in the ungrounded lead increases the sensitivity of the pulse interference suppression circuit without impairing receiver operation. The circuit provides interference suppression that is not dependent upon the receiver band width and therefore usable both for AM reception and for FM reception.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.