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:
Dec. 30, 2025
Filed:
Nov. 29, 2023
Applicant:
Gigadevice Semiconductor Inc., Beijing, CN;
Inventors:
Dequan Hou, Beijing, CN;
Sanlin Liu, Beijing, CN;
Assignee:
GIGADEVICE SEMICONDUCTOR INC., Beijing, CN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 19/165 (2006.01); H03G 1/00 (2006.01); H03G 3/00 (2006.01); H03G 3/34 (2006.01); H03K 5/1532 (2006.01); H03K 5/24 (2006.01);
U.S. Cl.
CPC ...
H03G 3/342 (2013.01); H03G 1/0035 (2013.01); H03G 3/007 (2013.01);
Abstract
A squelch detector is disclosed by the present application. By configuring the first to third bias current sources and a mirror ratio of the current mirror circuit, when an amplitude difference between first and second input signals is smaller or greater than a squelch threshold, flip of an output node in the squelch detector depends only on the squelch threshold and is independent of variations of process, voltage and temperature (PVT) parameters. Thus, the squelch detector can always provide reliable amplitude detection of input signals despite of possible variations of the PVT parameters.