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:
Jun. 18, 1996
Filed:
Jun. 01, 1995
Mitsuo Baba, Tokyo, JP;
Yasushi Aoki, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A plurality of clock signals at an identical frequency but with different phases are oscillated by a voltage-controlled oscillator beforehand, and selection is made of one of the clock signals whose phase is closest to that of the data signal each time the data signal rises. In parallel with the selection of phase, a phase/frequency comparison is made between any one of the clock signals output from the voltage-controlled oscillator and the selected clock signal. After the comparison, the oscillation frequency of the voltage-controlled oscillator is converted for their matching. This matching allows acquisition of a clock signal with the closest phase immediately after arrival of the data signal, and acquisition of an extraction clock signal with the frequency and phase matched in a short time by parallel conversion of the oscillation frequency of the voltage-controlled oscillator.