PLL circuit

Details PLL circuit PLL circuit

2009-09-15

2011-12-27

Chang, Joseph (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural a.f.s. for a single oscillator

C331S017000, C331S057000, C331S182000, C331S185000, C331S186000

Reexamination Certificate

active

08085098

ABSTRACT:
A PLL circuit comprising an oscillation unit, a frequency division unit, a phase comparison unit, and a generation unit comprises a switching unit that switches between a first state in which a control voltage output from the generation unit is input into the oscillation unit and a second state in which a reference voltage is input into the oscillation unit; and a correction unit that, in the second state, compares the control voltage output from the generation unit with the reference voltage, and corrects a frequency at which the oscillation unit oscillates with respect to a voltage input into the oscillation unit, such that the control voltage output from the generation unit is equivalent to the reference voltage.

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Yoshikazu Yamazaki, U.S. Appl. No. 12/561,239, filed Sep. 16, 2009.

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