The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 21, 1978
Filed:
Jun. 08, 1977
Garry N Hulderman, Riverside, CA (US);
Jay B Winderman, Claremont, CA (US);
General Dynamics Corporation, Pomona, CA (US);
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.