Amplifiers – With semiconductor amplifying device – Including differential amplifier
Reexamination Certificate
2007-10-16
2007-10-16
Pascal, Robert (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including differential amplifier
C330S302000, C330S252000
Reexamination Certificate
active
10808619
ABSTRACT:
From power supply potential wiring to ground potential wiring, a first inductor, a first resistance, a first output terminal, and a first transistor are series-connected in this order, and in parallel with these, a second inductor, a second resistor, a second output terminal, and a second transistor are series-connected in this order. And, one electrode of a first variable capacitor is connected between the first inductor and first resistor, and one electrode of a second variable capacitor is connected between the second inductor and second resistor. The other electrodes of the first variable capacitor and second variable capacitor are connected to a first frequency characteristics control terminal and a second frequency characteristics control terminal, respectively. In addition, drains of the first transistor and second transistors are connected to the first output terminal and second output terminal, respectively, sources of the same are connected to a drain of a third transistor, and gates of the same are connected to a first input terminal and a second input terminal, respectively. Furthermore, a gate of the third transistor is connected to a bias terminal, and a source of the same is connected to the ground potential wiring.
REFERENCES:
patent: 6060956 (2000-05-01), Mole et al.
patent: 6340899 (2002-01-01), Green
patent: 6600363 (2003-07-01), Minch
patent: 6784735 (2004-08-01), Lin
patent: 2003/0184378 (2003-10-01), Segawa
patent: 2288502 (1995-10-01), None
patent: 11-88087/1999 (1999-03-01), None
http://www.electronics-tutorials.com/oscillators/voltage-controlled-oscillators.htm, Voltage Controlled Oscillators, May 8, 2005, p. 2.
Flanagan Krista M.
NEC Electronics Corporation
Pascal Robert
Scully , Scott, Murphy & Presser, P.C.
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