Circuit for physical quantity detection device, physical quantity detection device, electronic apparatus, and moving object
AssigneeSeiko Epson Corporation
InventorsKiminori Nakajima, Koji Ushiyama, Takashi Aoyama, Koji Miyashita
Life of this patent
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Abstract
A circuit for a physical quantity detection device includes a drive unit that generates a drive signal that causes an vibrator to vibrate, a detection unit that detects a detection signal outputted from the vibrator based on the drive signal, a passive filter which has a filter characteristic in which a cutoff frequency is lower than a detuning frequency and a cutoff frequency band contains a frequency band higher than the cutoff frequency and to which a signal from the detection unit is inputted, and an amplification unit that amplifies a signal from the passive filter.
Claims13
A circuit for a physical quantity detection device, the circuit comprising:
- a drive unit that generates a drive signal, the drive signal causing a vibrator to vibrate;
- a detection unit that detects a detection signal outputted from the vibrator based on the drive signal;
- a passive filter which has a filter characteristic in which a cutoff frequency is lower than a detuning frequency and in which a cutoff frequency band contains a frequency band higher than the cutoff frequency, a signal from the detection unit being inputted to the passive filter;
- and
- an amplification unit that amplifies a signal from the passive filter.
Dependencies are inferred from the claim text.