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:
Sep. 17, 1985
Filed:
Jul. 25, 1983
Applicant:
Inventor:
Shin-ichi Amemiya, Yokohama, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
128663 ; 7386125 ;
Abstract
An ultrasonic pulse Doppler blood flow meter, wherein an amplitude equalizing circuit is inserted between the high-pass filter provided in the successive stage of the Doppler detector and the Doppler analyzer. The amplitude equalizing circuit not only effectively utilizes the input dynamic range of the Doppler analyzer but also automatically adjusts the cut-off frequency of the high-pass filter in accordance with the input signal. Therefore, a blood flow meter which requires minimal manual adjustment is obtained.