Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-03-20
2007-03-20
Ton, My-Trang Nu (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C330S289000
Reexamination Certificate
active
10905660
ABSTRACT:
Provided is a temperature-compensated bias circuit for a power amplifier, in which a first resistor (Rref) connected to a reference voltage is connected to a base terminal of a third transistor (Q3) and an emitter terminal of the third transistor is connected to a first diode (D1). The temperature-compensated bias circuit includes a second resistor (R1) connected to the reference voltage, a third resistor (R2) connected to the second resistor in series, a fourth resistor (Rc) having one terminal connected to the reference voltage, a fifth resistor (Re) having one terminal connected to ground, a bias transistor (Q4) having a base terminal connected to a contact point (VS) between the second resistor and the third resistor, a collector terminal connected to the other terminal of the fourth resistor, and an emitter terminal connected to the other terminal of the fifth resistor, and a sixth resistor (Rf) connected between a collector terminal of the third transistor and a collector terminal of the bias transistor.
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Jeon Moon-Suk
Jung Sang Hwa
Kim Jung-hyun
Nu Ton My-Trang
Townsend and Townsend / and Crew LLP
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