Electronic digital logic circuitry – Having logic levels conveyed by signal frequency or phase
Patent
1995-10-30
1996-06-18
Westin, Edward P.
Electronic digital logic circuitry
Having logic levels conveyed by signal frequency or phase
327 3, 327 12, H03K 1700
Patent
active
055281753
ABSTRACT:
Any one of several improved devices capable of implementing microwave phase logic (MPL) operating at gigabits per second rates comprises either at least one of means performing the function of a multigate microwave-monolithic-integrated-circuit (MMIC) field-effect transistor (FET), or a pair of doubly-balanced mixers, in which each of the mixers includes an RF port, a local-oscillator (LO) port and an IF port, and the IF port of a first of the doubly-balanced mixers is directly connected to the IF port of a second of the doubly-balanced mixers. The first of the doubly-balanced mixers is operative as a demodulator for deriving (1) a given polarity at its IF port in response to substantially in-phase signals of the same first specified frequency being respectively applied to its RF and LO ports and (2) a polarity opposite to the given polarity at its IF port in response to substantially out-of-phase signals of the same first specified frequency being respectively applied to its RF and LO ports, and the second of the doubly-balanced mixers is operative as a modulator for deriving (3) a signal of a given phase and second specified frequency at its RF port in response to a signal of the second specified frequency being applied to its LO port and the given polarity being applied its IF port and (4) a signal of a phase substantially 180.degree. out-of-phase with the given phase and second specified frequency at its RF port in response to a signal of the second specified frequency applied to its LO port and the polarity opposite to the given polarity being applied its IF port.
REFERENCES:
patent: 4638188 (1987-01-01), Cray
patent: 4788509 (1988-11-01), Bahl
patent: 5039889 (1991-08-01), Janta
patent: 5252865 (1993-10-01), Davenport
patent: 5338989 (1994-08-01), Tanino
W. Kleinfelder, Parametron Logic Phase to Amplitude Converter, Mar. 1963, IBM Technical Disclosure.
MMTC Inc.
Sanders Andrew
Seligsohn G. J.
Westin Edward P.
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