New MOSFET-based expander for high frequency ultrasound systems

Diode-based expanders (expanders with single-crossed diodes) are widely used for pulse-echo measurements and in imaging systems. The function of the diode-based expander is to obstruct the noise from the transmitted output signals of the pulser and block the returned signals from the ultrasonic transducers to the pulser. It may also degrade the performance… CONTINUE READING