Oscillation driver circuit, oscillation driver device, physical quantity measurement circuit, physical quantity measurement device, and electronic instrument
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United States of America Patent
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Oct 5, 2010
Issued Date -
N/A
app pub date -
Jul 22, 2008
filing date -
Jul 24, 2007
priority date (Note) -
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Importance
Abstract
An oscillation driver circuit that drives a physical quantity transducer includes a one-input/two-output comparator. The one-input/two-output comparator includes a shared differential section that compares a voltage signal input from a drive current/voltage conversion amplifier circuit with a given voltage, a first output section that receives a signal output from the differential section, variably adjusts a voltage amplitude of the received signal, and outputs the resulting signal, and a second output section that receives the signal output from the differential section, and outputs a synchronous detection reference signal of which the voltage amplitude is fixed.
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