Interference pulse detector circuit
US4000414A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1975 |
| Grant date | Dec 28, 1976 |
| Priority date | — |
| Expiry date | Jun 30, 1995 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03G3/345
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit resonant at a frequency above the frequency band occupied by a signal to be protected is set into damped oscillations by high-frequency components of an interfering pulse and produces a voltage spike at the beginning of the interfering pulse. A differentiator circuit produces a close succession of a pair of oppositely polarized spikes in response to the spike produced by the resonant circuit, while substantially eliminating the rest of the signal and a switching transistor is caused to discharge a capacitor suddenly when the positive-going spike of the pair reaches it. The common connection point of the coil, capacitor and resistor of the resonant circuit is a point at which a delayed signal is obtained and the signal to be protected is thus provided with the benefit of this delay before it is subjected to blanking by the pulse produced at the collector of the switching transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.