Wide frequency range agile voltage controlled oscillator

Details Wide frequency range agile voltage controlled oscillator Wide frequency range agile voltage controlled oscillator

2006-08-29

2006-08-29

Pascal, Robert (Department: 2817)

Oscillators

With frequency adjusting means

With voltage sensitive capacitor

C331S03600C, C331S1170FE, C331S167000

Reexamination Certificate

active

07098750

ABSTRACT:
A voltage controlled oscillator that can rapidly change frequencies over a wide range is disclosed. The voltage controlled oscillator has a transistor having a base, an emitter and a collector. An output port and a power supply port are connected to the collector. A high pass filter is connected between ground and the base of the transistor. A tuning element is connected between the high pass filter and ground. The tuning element includes a pair of varactor diodes. The varactor diodes have their cathodes connected together at a first node. A series combination of a resistor and inductor are connected between a tuning port and the first node. A capacitor is connected between the first node and the emitter.

REFERENCES:
patent: 5923221 (1999-07-01), Dobrovolny
patent: 6239664 (2001-05-01), Northam
patent: 6466099 (2002-10-01), Festag
patent: 6486744 (2002-11-01), Cann
patent: 2004/0222858 (2004-11-01), Corse et al.
patent: 2401263 (2004-11-01), None

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