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. 02, 1985
Filed:
May. 19, 1982
Applicant:
Inventors:
Akira Endo, Katsuta, JP;
Katsuhiro Kimura, Tokyo, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01S / ;
U.S. Cl.
CPC ...
343-8 ; 343 / ;
Abstract
A Doppler radar type speedometer capable of speed detection without a detection error comprises a Doppler radar signal processing circuit which includes a random access memory. In the circuit, the levels '1' of Doppler radar pulses of individual frequencies are added to the contents of the random access memory which stores the resultant data therein, so that the pulse width can be detected which is provided by the number of levels '1' at the most significant bits of the results stored in the addresses corresponding to a n/2-th output pulse signal of a predetermined number n of output pulse signals arranged in order of pulse widths.