Noise riding threshold control with immunity to signals with high pulse repetition frequencies and high duty cycles
US6433730B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2001 |
| Grant date | Aug 13, 2002 |
| Priority date | — |
| Expiry date | Jun 7, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/021
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method is disclosed for a radar receiver, such as a wideband crystal video early warning receiver, to automatically detect the noise level of the radar receiver with immunity to high pulse repetition frequencies and high duty cycle signals. The noise riding threshold circuit utilizes high frequency components of the noise and, to the attenuated extent present, high frequency components of the video signal to produce the noise riding threshold voltage. An amplifier gain control permits adjusting the noise-riding threshold to a fixed relative level. In a preferred embodiment, the noise riding threshold control of the present invention utilizes current feedback amplifiers for wide bandwidth, high gain video amplifiers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.