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:
Aug. 17, 1993
Filed:
May. 08, 1992
Mihai Banu, Murray Hill, NJ (US);
Alfred E Dunlop, Murray Hill, NJ (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A method and apparatus for recovering the phase of a signal which may change at periodic intervals is disclosed which comprises gated variable frequency oscillators. These results are obtained in an illustrative embodiment of the present invention in which an incoming signal is fed into a gated oscillator and the complement of the incoming signal is fed into a matching gated oscillator. Advantageously, the respective outputs of the two oscillators are fed into a Boolean NOR gate. When the gated oscillators are designed to oscillate at the frequency of the incoming signal, the output waveform will have a bounded phase relationship with respect to the incoming signal.