Power supply voltage output circuit

Details Power supply voltage output circuit Power supply voltage output circuit

2009-10-28

2011-10-18

Mis, David (Department: 2817)

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

C331S034000, C331S057000, C331S186000

Reexamination Certificate

active

08040192

ABSTRACT:
A power supply voltage output circuit includes: a power supply voltage generation unit generating a power supply voltage to be supplied into a ring oscillator; a reference clock oscillator oscillating a reference clock with respect to a clock oscillated by the ring oscillator; a phase difference detection unit detecting a phase difference between the clock from the ring oscillator and the reference clock from the reference clock oscillator; a filter unit smoothing an output of the phase difference detection unit; and a PWM signal generation unit generating a PWM signal based on an output of the filter unit such that the phase difference approaches zero.

REFERENCES:
patent: 6157231 (2000-12-01), Wasson
patent: 2002/0190283 (2002-12-01), Seno et al.
patent: 2005/0001600 (2005-01-01), Morales
patent: 2006/0139820 (2006-06-01), Ozawa et al.
patent: 2002-100967 (2002-04-01), None
patent: 2002-540668 (2002-11-01), None
patent: 2006-187153 (2006-07-01), None

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