Patent ID: 9157897
Filing Date: 2015-10-13
Classification: A61B,B06B,G01N

Abstract:
1. A transmitter for generating ultrasound signals, comprising: an ultrasonic signal transducer that converts an electrical signal into an acoustical signal; and a first transmitter output driver comprising an N-type device serially coupled to a P-type device; and a first transmitter input driver comprising an N-type device serially coupled to a P-type device, an output of the first transmitter input driver being coupled to an input of the first transmitter output driver; wherein the first transmitter output driver, while enabled, drives an output of the transmitter to a first voltage, and the first transmitter input driver drives the output of the transmitter to a second voltage while the first transmitter output driver is disabled, a first diode connected to an input of the first transmitter output driver and the output of the first transmitter input driver; a second diode connected to the first diode and the output of the transmitter; wherein the first diode and the second diode form a path for current flow between the output of the transmitter and the first transmitter input driver when the transmitter output driver is disabled, a second transmitter output driver comprising an N-type device serially coupled to a P-type device; and a second transmitter input driver comprising an N-type device serially coupled to a P-type device, an output of the second transmitter input driver being coupled to the input of the second transmitter output driver; wherein the second transmitter output driver drives an output of the transmitter to a third voltage and the second transmitter input driver drives the output of the transmitter to the second voltage while the second transmitter output driver is disabled.