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Patent Searching and Data


Title:
SWITCHING CIRCUIT AND ULTRASONIC DIAGNOSTIC APPARATUS USING THE SAME
Document Type and Number:
Japanese Patent JPH08168488
Kind Code:
A
Abstract:

PURPOSE: To miniaturize a circuitry and reduce an offset voltage by lessening the leakage of a signal along with the minimizing of power consumption in a switching circuit for switching the connection of a desired circuit.

CONSTITUTION: A constant current circuit 17 is used as power source for driving a switching diode 14 connected to a source to which two electric field transistors 8a and 8b of high withstand voltage analog switches 41-4n are connected in common through a resistance 13 to get one end of the resistance 13 connected to the constant current circuit 17 during the OFF operation of the two electric effect transistors 8a and 8b. Thus, the miniaturization of a circuitry and reduction in an offset voltage by lessening the leakage of a signal along with the minimizing of power consumption can be achieved.


Inventors:
ISHIKAWA HIROKO
KONDO TOSHIRO
KANDA HIROSHI
Application Number:
JP1994000333790
Publication Date:
July 02, 1996
Filing Date:
December 19, 1994
Export Citation:
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Assignee:
HITACHI MEDICAL CORP
International Classes:
A61B8/00; H01H9/54; (IPC1-7): A61B8/00; H01H9/54
Attorney, Agent or Firm:
西山 春之