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Title:
AMPLIFIER CIRCUIT AND ULTRASONIC PROBE
Document Type and Number:
WIPO Patent Application WO/2015/186234
Kind Code:
A1
Abstract:
The objectives of the invention are to amplify signals by use of a small-sized circuit and to reduce electric powers. A current control/current source unit (53) varies, on the basis of a transition time setting signal (tp), a current to be outputted. A current control/current source unit (54) varies, on the basis of a transition time setting signal (tn), a current to be pulled in. An amplitude control unit (55) varies, on the basis of an amplitude setting signal (ap), a power supply voltage to be supplied to the current control/current source unit (53), thereby varying the amplitude of the voltage occurring due to the current to be outputted from the current control/current source unit (53). An amplitude control unit (56) varies, on the basis of an amplitude setting signal (an), a power supply voltage to be supplied to the current control/current source unit (54), thereby varying the amplitude of the voltage occurring due to the current to be pulled in by the current control/current source unit (54). A buffer unit (57) drives a load in accordance with the current outputted from the current control/current source unit (53) and with the current pulled in from the current control/current source unit (54).

Inventors:
NISHIMOTO TAKUMA (JP)
IGARASHI YUTAKA (JP)
KATSUBE YUUSAKU (JP)
IMAGAWA KENGO (JP)
Application Number:
PCT/JP2014/065033
Publication Date:
December 10, 2015
Filing Date:
June 06, 2014
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
H03K4/94; A61B8/00
Foreign References:
JPH0214612A1990-01-18
JPH0177034U1989-05-24
JP2000005180A2000-01-11
Other References:
See also references of EP 3154197A4
Attorney, Agent or Firm:
Shoyo Intellectual Property Firm (JP)
Patent business corporation SHOYO Intellectual Property Firm (JP)
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