Oscillators – With particular source of power or bias voltage
Reexamination Certificate
2006-12-19
2006-12-19
Chang, Joseph (Department: 2817)
Oscillators
With particular source of power or bias voltage
C331S176000, C331S044000, C327S157000
Reexamination Certificate
active
07151418
ABSTRACT:
A method and an apparatus to bias a charge pump in a phase locked loop (PLL) to compensate a voltage controlled oscillator (VCO) gain have been disclosed. One embodiment of the apparatus includes a PLL comprising a charge pump, the charge pump comprising an input and an output, and a bias circuit coupled to the input of the charge pump, the bias circuit comprising a sensor circuit to sense a temperature and at least one of a voltage and a process variation and a current reference circuit coupled to the sensor circuit.
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Chew Chwei-Po
Scott Paul H.
Blakely , Sokoloff, Taylor & Zafman LLP
Chang Joseph
Cypress Semiconductor Corporation
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