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:
Dec. 09, 1982
Applicant:
Inventors:
Assignee:
Sony Corporation, Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
358 30 ;
Abstract
A plurality of sampled signals that differ in phase by 2.pi./N (where N is an integer greater than 1) from one another are mixed by sequentially supplying the sampled signals to a holding circuit, the holding circuit output is buffered in a buffer amplifier to produce the system output having a beneficial high-frequency characteristic. Deterioration of the frequency characteristic of the synthesized output signal for a high frequency range due to a low-pass filter effect stemming from the zero hold in the sample/hold circuit is prevented by the mixing circuit.