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:
Dec. 05, 1989
Filed:
Oct. 05, 1988
Applicant:
Inventor:
Arnoldus J Boudewijns, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03L / ; H03L / ;
U.S. Cl.
CPC ...
331 / ; 331 14 ; 331 17 ; 331 27 ;
Abstract
In a phase control loop of an oscillator circuit having an oscillator (1) whose frequency is dependent on a control current (81), an output signal is obtained from a phase detector (13) in the phase control loop and is applied to a switchable (23, 27) first current-source circuit (29) charging a capacitor (35) from which a control signal is obtained which is applied via a second current-source circuit (63) to a control signal input (81) of the oscillator (1). To render the operation of the circuit less dependent on the frequency of phase variations, the second current-source circuit is also switchable (69, 71) by the phase detector (13).