Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1977-06-08
1978-02-21
Grimm, Siegfried H.
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
307232, 307317R, 329205R, 329206, H03K 900, H03K 1912
Patent
active
040755711
ABSTRACT:
A video detector circuit for a radar system, including a detector diode having one of its electrodes connected to an input terminal for detecting an applied signal containing target information, rms noise voltage and components that are representative of clutter, and its other electrode connected to a load terminal for providing a detected signal; and a load resistance connected between the load terminal and a bias terminal; wherein a dc potential is provided at the bias terminal to forward bias the detector diode to have a quiescent operating point below the midpoint of the knee portion of its characteristic curve, thereby limiting diode rms noise current and components in the detected signal that are representative of clutter. As a result both the signal-to-noise ratio and the target-to-clutter ratio of the video detector circuit are enhanced. A filter network is connected between the load terminal and an output terminal for providing an output signal at the output terminal in which low frequency components representative of clutter in the detected signal are suppressed.
REFERENCES:
patent: 3519943 (1970-07-01), Gassmann
patent: 3593171 (1971-07-01), Gassmann
patent: 3603988 (1971-09-01), Johnson
Hulderman Garry N.
Winderman Jay B.
General Dynamics Corporation
Grimm Siegfried H.
Johnson Edward B.
Martin Neil F.
LandOfFree
Externally biased video detector circuit for limiting clutter an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Externally biased video detector circuit for limiting clutter an, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Externally biased video detector circuit for limiting clutter an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-128992