Oscillators – With distributed parameter resonator
Patent
1992-06-30
1993-08-10
Grimm, Siegfried H.
Oscillators
With distributed parameter resonator
331 99, 331115, 331117D, 331177V, 331179, H03B 512, H03B 518, H03B 714
Patent
active
052352935
ABSTRACT:
A resonator (50) is connected in circuit with a negative resistance element (Q3,Q4) for producing oscillation at a resonant frequency of the resonator (50). A digital phase shifter (58) is incorporated into the resonant frequency in accordance with an applied digital signal. The resonator (50) can be connected in series with the negative resistance element (Q3), in which case the phase shifter (58) is connected as either a short-circuit or an open-circuit transmission line. Alternatively, the resonator (50) can be connected in parallel with the negative resistance element (Q4) in a feedback loop. An analog phase shifter (84) can also be provided in the resonator (50') for continuously variably setting the resonant frequency over the tuning increments of the digital phase shifter (58).
REFERENCES:
patent: 5150080 (1992-09-01), Bianchini et al.
"GaAs MESFET Circuit Design", edited by R. Soares, published by Artech House, 1988, pp. 347-348.
"A Compact Broadband, Six-Bit MMIC Phasor with Integrated Digital Drivers", by C. Moye et al., 1990 IEEE MTT-S Digest, pp. 457-459.
Denson-Low W. K.
Grimm Siegfried H.
Gudmestad Terje
Hughes Aircraft Company
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