| 摘要 |
A ultrasonic sensor driving unit is provided to support multiple modes, adjust the driving frequency band of an ultrasonic sensor by using a resistor and a capacitor and actively adjust amplification gain to improve reflected wave receiving sensitivity. An ultrasonic sensor driving unit(10) includes an oscillator(110), a driver(120), an amplification unit(210), and a delay detector(220). The oscillator oscillates an ultrasonic signal in an oscillation mode. The driver drives the oscillated signal as a signal for driving an ultrasonic sensor and outputs the signal to an output terminal(T). The amplification unit amplifies a reflected wave signal received through an input terminal. The delay detector detects the time during which the reflected wave signal is received after the signal is oscillated. |
