Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-04-04
1991-01-15
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307265, 307605, 307603, 328 63, 328 55, H03K 513, H03K 3017
Patent
active
049856405
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.
REFERENCES:
patent: 4604582 (1986-08-01), Strenkowski et al.
Grochowski Edward
Gupta Rajesh
Callahan Timothy P.
Intel Corporation
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