SIGNAL PROCESSING CIRCUIT AND ULTRASONIC DOPPLER DEVICE

摘要

PURPOSE: To provide a signal processing circuit and an ultrasonic Doppler device compiling continuous wave signal paths relative to a delay circuit input for controlling the ultrasonic wave beam using less switches in an ultrasonic continuous wave Doppler device. CONSTITUTION: This ultrasonic Doppler device is provided with multiple amplification circuits 602 amplifying multiple continuous wave input signals respectively and outputting a pair of amplification signals having mutually inverse phases for every continuous wave input signal, multiple selecting circuits 604 alternately selecting a pair of amplification signals for every multiple amplification circuits, and a matrix switch 608 setting output signals of the multiple selecting circuits as the input signals.