Oscillators – Solid state active element oscillator – Transistors
Patent
1994-04-05
1995-11-21
Pascal, Robert J.
Oscillators
Solid state active element oscillator
Transistors
331117R, 331177V, 331177R, 331167, 331175, 334 15, 455255, 455262, 4551951, 4551961, 4551912, H03B 500
Patent
active
054691176
ABSTRACT:
An oscillator comprising an amplifier device, a capacitive divider bridge whose terminals are connected between a control electrode of the device and a reference voltage, the intermediate junction point of this bridge being connected to a principal electrode of the device, and also comprising, in parallel between the control electrode and the reference voltage, a tuning circuit having parallel branches: a first branch with an inductance in series with a variable capacitance, and, a second branch equivalent to a variable capacitance. The tuning circuit has a third branch constituted by a capacitance in parallel with the first branch, while a series inductance whose value is smaller than that of the tuning inductance is arranged between the junction point connecting the two latter branches and the junction point connecting the control electrode of the device to the second branch and to the divider bridge.
REFERENCES:
patent: 3813615 (1974-05-01), Okazaki
patent: 3825858 (1974-07-01), Amemiya
patent: 4074209 (1978-02-01), Lysobey
patent: 4536724 (1985-08-01), Hasegawa et al.
patent: 4593257 (1986-06-01), Wignot
patent: 4736169 (1988-04-01), Weaver et al.
Gathman Laurie E.
Kinkead Arnold
Pascal Robert J.
U.S. Philips Corporation
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