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:
Sep. 19, 2017
Filed:
Jan. 07, 2016
Applicant:
Airoha Technology Corp., Hsinchu, TW;
Inventor:
Chun-Hsiung Chang, Hsinchu, TW;
Assignee:
Airoha Technology Corp., Hsinchu, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 1/02 (2006.01); H03F 1/56 (2006.01); H03F 3/21 (2006.01); H03F 1/32 (2006.01); H03F 3/19 (2006.01); H03F 1/14 (2006.01);
U.S. Cl.
CPC ...
H03F 1/565 (2013.01); H03F 1/14 (2013.01); H03F 3/19 (2013.01); H03F 3/21 (2013.01); H03F 2200/318 (2013.01); H03F 2200/451 (2013.01); H03F 2203/21139 (2013.01);
Abstract
A method for improving circuit stability is disclosed. In the method of the present invention, the circuit is analyzed to find the frequency band in which the input impedance at a target node behaves as a negative resistance, and then find the signal path of the frequency band in the matching circuit in front of the target node and add an attenuator in the signal path. This prevents the circuit from oscillation and improves the stability of the circuit. Furthermore, the signal on the main signal path will not be attenuated and the performance of the circuit will be maintained.