Ultrasonic diagnostic apparatus
First Claim
1. An ultrasonic diagnostic apparatus for transmitting ultrasonic signals from ultrasonic transducers toward a subject to be examined, and receiving reflected waves of said ultrasonic signals for display, comprising:
- an analog switch for switching ultrasonic transducers for transmission of said ultrasonic signals and reception of said reflected waves;
a transmitter power source for supplying a high voltage to a transmitter circuit for causing said ultrasonic transducers to drive said ultrasonic signals; and
a bias power source generating circuit for generating a bias power source for said analog switch from said transmitter power source.
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Accused Products
Abstract
For the purpose of reducing the size and power consumption of a power source in an ultrasonic diagnostic apparatus, charge pump circuits 50 and 60 are connected to a transmitter power source 14. A regulator in the transmitter power source 14 drives the charge pump circuit 50 to generate a positive bias voltage +HV2 higher than a positive voltage +HV1 generated by the transmitter power source 14. The regulator in the transmitter power source 14 also drives the charge pump circuit 60 to generate a negative bias voltage −HV2 lower than a negative voltage −HV1 generated by the transmitter power source 14.
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Citations
6 Claims
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1. An ultrasonic diagnostic apparatus for transmitting ultrasonic signals from ultrasonic transducers toward a subject to be examined, and receiving reflected waves of said ultrasonic signals for display, comprising:
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an analog switch for switching ultrasonic transducers for transmission of said ultrasonic signals and reception of said reflected waves;
a transmitter power source for supplying a high voltage to a transmitter circuit for causing said ultrasonic transducers to drive said ultrasonic signals; and
a bias power source generating circuit for generating a bias power source for said analog switch from said transmitter power source. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification