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. 10, 1984
Filed:
Jan. 15, 1982
Takenori Kurihara, Gyoda, JP;
Takeda Riken Kogyo Kabushikikaisha, Tokyo, JP;
Abstract
First and second frequency signals are frequency converted by a frequency converter and the frequency-converted output and the output from a variable frequency oscillating means are phase compared by a digital phase comparator. The phase-compared output controls the variable frequency oscillating means, constituting a first phase lock loop of a wide capture range. The output from the variable frequency oscillating means is frequency converted by the first frequency signal and the converted output and the second frequency signal are phase compared by an analog phase comparator. By the phase-compared output is controlled the variable frequency oscillating means, constituting a second phase lock loop of a narrow capture range but a large loop gain. The output frequency of the variable frequency oscillating means is varied by changing the setting of the frequencies of the first and second frequency signals.