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:
May. 09, 2017
Filed:
Mar. 18, 2014
Apparatus and methods for pll-based gyroscope gain control, quadrature cancellation and demodulation
Fairchild Semiconductor Corporation, San Jose, CA (US);
Shungneng Lee, Sunnyvale, CA (US);
Hai Tao, Sunnyvale, CA (US);
Ion Opris, San Jose, CA (US);
Shanthi Pavan, Fremont, CA (US);
FAIRCHILD SEMICONDUCTOR CORPORATION, San Jose, CA (US);
Abstract
This application discusses simplified interface circuits for a gyroscope. In an example, an interface can include an automatic gain control (AGC) circuit configured to couple to driver for a proof mass of a gyroscope sensor and to drive the proof-mass to oscillate at a predefined oscillation amplitude, and a phase-locked loop (PLL) configured to receive sensed oscillation information from the proof-mass and to provide at least a first phase signal synchronized with a sinusoidal waveform of the sensed oscillation information.