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:
May. 20, 2003
Filed:
Aug. 22, 2001
Stanley A. White, San Clemente, CA (US);
Honeywell International Inc., Morristown, NJ (US);
Abstract
A digital phase locked loop includes an automatic gain control that applies a gain to an input signal in order to provide a gain controlled signal. A 90° phase shifter applies a 90° phase shift to the gain controlled signal in order to provide a 90° phase shifted version of the gain controlled signal. A phase detector is driven by the gain controlled signal, by the 90° phase shifted version of the gain controlled signal, and by sinusoidal and co-sinusoidal signals. A loop filter integrates an output of the phase detector and provide servo equalization for the phase-locked loop. A digital dual frequency oscillator has a fundamental frequency controlled by an output signal from the loop filter. Also, the digital dual frequency oscillator generates the sinusoidal and co-sinusoidal signals.