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:
Jan. 15, 1991
Filed:
Apr. 04, 1990
Edward Grochowski, San Jose, CA (US);
Rajesh Gupta, Sunnyvale, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A circuit for generating a pair of clock pulses of opposite phases each having the same frequency as the frequency of an input signal generated by a crystal oscillator including apparatus for generating first and second pair of signals at half the frequency of the input signal generated by a crystal oscillator, the signals of each pair being of opposite phase to one another; apparatus for comparing a first signal of the first pair signals with the one of the signals of the second pair of signals which is normally out of phase therewith to produce an output signal only when the two signals are in phase; apparatus for comparing the second signal of the first pair of signals with the one of the signals of the second pair of signals which is normally out of phase therewith to produce an output signal only when the two signals are in phase; apparatus utilizing one of the output signals to lengthen the duty cycle of one of the first pair of signals of opposite phases and the other of the output signals to shorten the duty cycle of the other of the first pair of signals of opposite phases; apparatus for producing a pair of clock pulses of opposite phases each having the same frequency as the frequency of an input signal generated by a crystal oscillator; and apparatus responsive to the apparatus utilizing one of the output signals to lengthen the duty cycle of one of the first pair signals of opposite phases and the other of the output signals to shorten the duty cycle of the other of the first pair of signals of opposite phases for equalizing the duty cycle of the pair of closk pulses of opposite phases each having the same frequency as the frequency of an input signal generated by a crystal oscillator.