Signal processing device, ultrasonic sensor and vehicle

Abstract

The present disclosure provides a signal processing device. The signal processing device includes a receiving circuit, an envelope detection circuit, a differential amplifier circuit and a selection circuit. The receiving circuit is configured to generate a reflected wave signal based on a reflected wave from an object. The envelope detection circuit is configured to generate an envelope detection signal of the reflected wave signal. The differential amplifier circuit is configured to generate a differentially amplified signal of the envelope detection signal. The selection circuit is configured to select one of a first signal and a second signal. The first signal is the envelope detection signal or a delayed signal of the envelope detection signal. The second signal is the differentially amplified signal or a signal obtained using a difference between the envelope detection signal and the differentially amplified signal.

Dependencies are inferred from the claim text.