VIBRATION GENERATION APPARATUS

摘要

In a gyro sensor, a TDC detects a magnitude of vibration of a vibrator. A drive circuit (excluding the TDC) determines a duty ratio of a PWM drive signal in accordance with the magnitude of vibration so that the magnitude of vibration becomes a predetermined magnitude and outputs the PWM drive signal having the determined duty ratio. The drive circuit (excluding the TDC) includes a control circuit and a DCO. The control circuit measures time corresponding to the control value by using a gate delay time, generates the PWM drive signal having a pulse width corresponding to the control value and outputs the PWM drive signal.

主权项

1. A vibration generation apparatus for driving a test body to vibrate in response to a PWM drive signal, the vibration generation apparatus comprising:
a magnitude detection part for detecting a magnitude of vibration of the test body; a drive part for determining a duty ratio of the PWM drive signal in accordance with the magnitude of vibration so that the magnitude of vibration becomes a predetermined magnitude and outputting the PWM drive signal having the determined duty ratio; wherein the drive part includes a control circuit and a drive signal generation circuit, the control circuit measuring time corresponding to the control value by using a gate delay time, generating the PWM drive signal having a pulse width corresponding to the control value, and outputting the PWM drive signal.