Voltage controlled oscillator for controlling phase noise and method using the same
AssigneeSamsung Electronics Co., Ltd.
InventorWoonyun KIM
Life of this patent
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Abstract
A voltage controlled oscillator (VCO) includes a VCO unit having multiple VCO unit output terminals and an amplifier having multiple amplifier output terminals respectively connected to the VCO unit output terminals. The VCO unit generates first output signals having an oscillation frequency corresponding to a supply voltage. The amplifier amplifies a value obtained by performing n-th differentiation on a transconductance component of each first output signal (n being a natural number). Second output signals, corresponding to the first output signals, are output through the amplifier output terminals. Each second output signal includes the amplified value of the corresponding first output signal.
Claims20
A voltage controlled oscillator (VCO) comprising:
- a VCO unit comprising a plurality of VCO unit output terminals, the VCO unit generating a plurality of first output signals having an oscillation frequency corresponding to a supply voltage;
- and
- an amplifier comprising a plurality of amplifier output terminals respectively connected to the plurality of VCO unit output terminals, the amplifier amplifying a value obtained by performing n-th differentiation on a transconductance component of each first output signal (n being a natural number),
- wherein a plurality of second output signals, corresponding to the plurality of first output signals, are output through the plurality of amplifier output terminals, each second output signal comprising the amplified value of the corresponding first output signal.
A method of improving phase noise in a voltage controlled oscillator (VCO), comprising:
- generating a plurality of first output signals having an oscillation frequency corresponding to a supply voltage;
- amplifying a value obtained by performing n-th (n being a natural number) differentiation on a transconductance component of each first output signal;
- and
- outputting a plurality of second output signals corresponding to the plurality of first output signals, each second output signal comprising the amplified value of the corresponding first output signal.
A method of reducing phase noise in a voltage controlled oscillator (VCO), the method comprising:
- generating a first output signal having an oscillation frequency corresponding to a supply voltage;
- performing secondary differentiation on a transconductance component of the first output signal to obtain a differentiation value;
- amplifying the differentiation value;
- and
- outputting a second output signal corresponding to the first output signal, second output signal comprising the amplified differentiation value.
Dependencies are inferred from the claim text.