Voltage controlled oscillator, PLL circuit, pulse modulation...

Details Voltage controlled oscillator, PLL circuit, pulse modulation... Voltage controlled oscillator, PLL circuit, pulse modulation...

2007-03-20

2007-03-20

Shingleton, Michael B (Department: 2817)

Oscillators

Ring oscillators

C331S016000, C331S175000, C331S185000

Reexamination Certificate

active

10854268

ABSTRACT:
An oscillation frequency control part includes a voltage-to-current converting circuit converting an input voltage to a current having a value corresponding to the input voltage, and outputting a current in proportion to the current obtained from the voltage-to-current converting circuit. An oscillating circuit part includes a ring oscillator, wherein a current in proportion to the output current of the oscillation frequency control part flows through the ring oscillator so that the oscillation frequency in the ring oscillator is controlled by the output current of the oscillation frequency control part. The voltage-to-current converting circuit has linear voltage-to-current conversion characteristics in a predetermined range of the input voltage including a ground potential.

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