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. 16, 2002
Filed:
Sep. 21, 2001
Robert Dale Altmanshofer, Carmel, IN (US);
Michael Evan Crabb, Carmel, IN (US);
Thomson Licensing S.A., Boulogne Cedex, FR;
Abstract
A phase locked loop, comprising: a controllable oscillator requiring a control signal having a given bias voltage for generating a clock signal; an integrator for developing the control signal; a source of an external synchronizing signal; first and second voltage sources defining a voltage potential related to the given bias voltage; a first switch coupled to the first and second voltage sources and responsive to the clock signal for developing a regenerated clock signal having a peak to peak voltage determined by the voltage potential; and, a second switch responsive to the external synchronizing signal for periodically sampling portions of the regenerated clock signal and coupling the sampled portions to the integrator, the sampled portions charging and discharging the integrator to generate the control signal with a large enough magnitude to provide the given bias voltage, said first and second switches forming a phase detector.