Voltage controlled oscillator

Details Voltage controlled oscillator Voltage controlled oscillator

2011-06-14

2011-06-14

Kinkead, Arnold (Department: 2817)

Oscillators

Plural oscillators

Cascade or tandem connected

C331S016000, C331S175000, C331S17700V

Reexamination Certificate

active

07961057

ABSTRACT:
An integrated circuit and an apparatus are provided. The integrated circuit comprises a bias circuit, an LC resonator circuit, and a current mode logic (CML) frequency divider. The bias circuit generates first and second bias voltages. The LC resonator circuit generates an oscillation signal having an oscillation frequency. The CML frequency divider, coupled to the bias circuit and the LC resonator circuit, biased by the first and second bias voltages, receives the oscillation signal to generate an output signal having an output frequency with a fractional rate of the oscillation frequency. The oscillation signal comprises AC and DC components, the CML frequency divider receives the AC component to determine an injected frequency and reuses the DC component to provide tail currents to determine a natural frequency of the CML frequency divider. The output frequency is determined by the injected frequency and the natural frequency.

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