Oscillators – With distributed parameter resonator
Patent
1997-05-13
1998-09-01
Grimm, Siegfried H.
Oscillators
With distributed parameter resonator
331117D, 331177R, H03B 518
Patent
active
058015914
ABSTRACT:
A multi-octave ferrite oscillator topology that utilizes transformer coupling to provide the proper phase shift in the feedback loop. In a specific embodiment, a 10 mil YIG sphere is loosely coupled to 20 mil input and output loops, both of which are connected to a GaAs integrated circuit that includes a Darlington pair of bipolar transistors. The Darlington pair provides high gain, high output power, and low parasitic reactance up to about 10 GHz. A resistor bridge across the base of the input transistor of the Darlington pair insures a substantially real input impedance over a wide bandwidth.
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Grimm Siegfried H.
Verticom, Inc.
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