Oscillators – Combined with particular output coupling network
Reexamination Certificate
2007-04-17
2007-04-17
Chang, Joseph (Department: 2817)
Oscillators
Combined with particular output coupling network
C331S057000
Reexamination Certificate
active
11192656
ABSTRACT:
The distortion component of an oscillation signal is reduced. An oscillation signal generating circuit generates, as oscillation signals, first generation oscillation signal and second generation oscillation signal which are related to each other as a differential signal. A differential amplifier performs differential amplification on the first generation oscillation signal and the second generation oscillation signal, respectively, and outputs first amplification oscillation signal and second amplification oscillation signal. A converter circuit converts the first amplification oscillation signal and the second amplification oscillation signal into an output current oscillation signal of such a form that sink current and source current are alternately switched. In order to convert voltages of the first amplification oscillation signal and the second amplification oscillation signal into currents, a variable current source delivers a converting drive current to drive the converter circuit. The magnitude of the converting drive current can be adjusted by externally adjusting a value of variable resistance contained in the variable current source.
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Maruyama Sho
Wakii Takeshi
Canon Colburn LLP
Chang Joseph
Rohm & Co., Ltd.
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