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:
Oct. 25, 1977
Filed:
Oct. 29, 1976
Yasuaki Watanabe, Yokohama, JA;
Yukio Okabe, Yokohama, JA;
Mitsuru Hayakawa, Yokohama, JA;
Yuichi Ikemura, Yokohama, JA;
Yasuhiro Fujita, Kadoma, JA;
Daisuke Murakami, Kadoma, JA;
Matsushita Electric Industrial Company Limited, BOTH OF, JA;
Victor Company of Japan, Limited, BOTH OF, JA;
Abstract
A variable frequency oscillator comprises an oscillating loop and a variable phase shifter for imparting one of two different phase shifts depending upon the polarities of a DC control voltage to a signal from the oscillating loop. The phase-shifted signal has its amplitude controlled by the amplitude of the control voltage and is combined with the signal in the oscillating loop. The vector sum of the combined signals determines the phase angle of the oscillator signal and hence the frequency thereof.