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:
Jul. 21, 2015
Filed:
Aug. 12, 2014
Ipgoal Microelectronics (Sichuan) Co., Ltd., Chengdu, CN;
Zhaolei Wu, Chengdu, CN;
Zhengxian Zou, Chengdu, CN;
IPGOAL MICROELECTRONICS (SICHUAN) CO., LTD., Chengdu, Sichuan, CN;
Abstract
An LC oscillator process compensation circuit includes an LC oscillator, a reference voltage terminal, a follower and a current auxiliary circuit, the LC oscillator includes a gain stage, an inductor and two voltage-controlled capacitors, the gain stage includes a first Field Effect Transistor, a second Field Effect Transistor, a third Field Effect Transistor and a fourth Field Effect Transistor, the current auxiliary circuit is connected with an external power source and the follower that connected with the reference voltage terminal to provide a working voltage for the LC oscillator, the follower includes a detection circuit to detecting current changes of the gain stage. The LC oscillator process compensation circuit has simple circuit structure and eliminates frequency changes of the LC oscillator caused by the process variations of the gain stage, thereby ensuring stability of the frequency of the LC oscillator, improving work precision and reducing design difficult.