Oscillators – Solid state active element oscillator – Transistors
Patent
1981-08-14
1984-11-06
Heyman, John S.
Oscillators
Solid state active element oscillator
Transistors
331177V, 357 14, 357 15, 357 22, 357 41, 357 51, H01L 2704, H03B 500
Patent
active
044814879
ABSTRACT:
A monolithic microwave voltage-controlled oscillator including one or more FETS integrated with a wide-ratio varactor. The varactor includes interdigitated anode and cathode patterns laid out on a single thin epitaxial layer. The punch through voltage of the epitaxial layer, and hence the resistivity-thickness product of the epitaxial layer, must be low. Since the substrate is semi-insulating, punch through to the substrate does not become uncontrollable, but simply permits modulation of the capacitance over a very wide range. The FETS are formed in the same epitaxial layer with the varactor, and complicated doping profiles are not required.
REFERENCES:
patent: 3544892 (1970-12-01), Gallagher et al.
patent: 3675161 (1972-07-01), Teramoto et al.
patent: 3749987 (1973-07-01), Anantha
patent: 3767984 (1973-10-01), Shinoda et al.
patent: 4135168 (1979-01-01), Wade
patent: 4150344 (1979-04-01), Fenk
patent: 4156249 (1979-05-01), Koo
patent: 4189682 (1980-02-01), Sechi
patent: 4189688 (1980-02-01), Sechi et al.
patent: 4237473 (1980-12-01), Chiang
patent: 4375621 (1983-03-01), Schneiter et al.
Maeda et al., "Design & Performance of X-Band Oscillators with GaAs Shottky-Gate FET", IEEE Microwave Theory and Tech., vol. MTT-23, No. 8, 8/75, pp. 661-667.
Wade, "X-Band Reverse Channel GaAs FET Power VCO", Microwave Journal, vol. 21, 4/78, p. 92.
Rauscher, "Broadband Varactor-Tuned GaAs FET Oscillator", Electronic Letters, vol. 16, No. 14, 7/80, pp. 534-535.
Rausher, "Large Signal Tech. for Designing Single-Frequency & Voltage-Controlled GaAs FET Oscillators", IEEE Microwave Theory & Tech., vol.-MTT29, No. 4, 4/81.
Scott et al., "Octive Band Varactor-Tuned GaAs FET Oscillators" IEEE International Solid-State Circuits Conference, 2/81, pp. 138-139.
Johnson, "Microwave Varactor Tuned Transistor Oscillator Design", IEEE Microwave Theory and Tech., vol. MTT-14, No. 11, Nov. 66, pp. 564-572.
Brehm Gailon E.
Scott Bentley N.
Callahan Timothy P.
Comfort James T.
Groover Robert
Heyman John S.
Sharp Melvin
LandOfFree
Monolithic microwave wide-band VCO does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Monolithic microwave wide-band VCO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Monolithic microwave wide-band VCO will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1044438