Patent ID: 9310203
Filing Date: 2016-04-12
CPC Classification: G01C,G01P

Claim Text:
1. A physical quantity sensor comprising: an oscillator for converting an externally applied physical quantity into an electrical signal; an oscillation circuit for causing said oscillator to oscillate, and for outputting a detection signal and a to-be-detected signal from said oscillator; a delta-sigma modulator for delta-sigma modulating either one of said detection signal and said to-be-detected signal, and for outputting a modulated signal; a detector circuit for detecting the other one of said detection signal and said to-be-detected signal by using said modulated signal, and for outputting a outputted signal; a variable voltage source capable of varying an output voltage in accordance with the individual differences of said oscillator; and a control unit for controlling said output voltage of said variable voltage source, wherein said delta-sigma modulator performs said delta-sigma modulation by using a feedback signal created based on said output voltage.