Mills & Onello LLP
Voltage-controlled oscillator circuit including level shifter
A voltage-controlled oscillator (VCO) circuit includes a level shifter, and a semiconductor device includes the VCO circuit. The VCO circuit includes an input voltage receiver, a current mirror, and a frequency oscillator. The input voltage receiver receives a first voltage input to the VCO circuit so as to generate a first current. The current mirror copies the first current so as to generate a second current. The frequency oscillator oscillates in response to the second current. The input voltage receiver includes a level shifter and a first current generator. The level shifter shifts a voltage level of the first voltage to a voltage level of a second voltage. The first current generator generates the first current corresponding to the second voltage.
Samsung Electronics Co., Ltd.
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Jung-hyeon Ji-hyun
Kim Kim