The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 14, 1987
Filed:
Feb. 10, 1986
Applicant:
Inventors:
Assignees:
Hitachi, Ltd., Tokyo, JP;
Hitachi Medical Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310319 ;
Abstract
An input circuit in which an input impedance of a reception amplifier connected to a piezoelectric transducer is selected to be lower than an impedance composed of an inter-electrode capacitance of the piezoelectric transducer, an equivalent capacitance of a cable used to connect the piezoelectric transducer to the reception amplifier, etc., that is, the parallel impedance of those elements connected in parallel to the reception amplifier so that the reception amplifier is used as an amplifier of the current detection type.