Oscillators – Solid state active element oscillator – Transistors
Patent
1986-09-29
1988-04-05
Grimm, Siegfried H.
Oscillators
Solid state active element oscillator
Transistors
331117D, 331117V, 332 30V, H03B 518, H03C 322
Patent
active
047361697
ABSTRACT:
A voltage controlled oscillator is tuned with a network comprising two varactor diodes and two transmission lines. By selecting appropriate values of varactor capacitance and transmission line length and width the overall reactance of the network is such that, when a varactor tuning voltage is varied, the output frequency of the voltage controlled oscillator will vary in an fashion with respect to the tuning voltage. Such a voltage controlled oscillator is gain compensated and exhibits a controlled modulation sensitivity over a range of frequencies. If the required frequency range of the oscillator is known beforehand, an alternate embodiment of the invention may be employed in which one of the varactor diodes is replaced with a fixed capacitor having a suitable value for the desired frequency range.
REFERENCES:
patent: 4009448 (1977-02-01), Hopwood et al.
patent: 4288875 (1981-09-01), Carter
patent: 4310809 (1982-01-01), Buck et al.
patent: 4392113 (1983-07-01), Jackson
patent: 4462110 (1984-07-01), Baldwin et al.
Niehenke et al, "A Microstrip Low-Noise X-Band Voltage-Controlled Oscillator", IEEE Trans. Microwave Theory and Techniques, vol. MTT-27, No. 12, Dec. 1979.
Ku-Band Digitally Tuned Oscillator will soon be available for Systems Designers, C. Pham, J. Lee, D. Kumamoto, Defence Electronics, Feb. 1982, pp. 46-53.
Smith Bryce M.
Theis Dana H.
Walsh, Jr. Bernard L.
Weaver Gary R.
Grimm Siegfried H.
Hughes Aircraft Company
Karambelas A. W.
Meltzer M. J.
Mitchell S. M.
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