Apparatus for reducing power consumption of device controlled by

Details Apparatus for reducing power consumption of device controlled by Apparatus for reducing power consumption of device controlled by

1996-10-09

1998-06-09

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Particular error voltage control

331 25, 377107, H03K 2138, H03L 7183

Patent

active

057641080

ABSTRACT:
An apparatus for reducing the power consumed by, and the noise generated at the output of a charge pump which is part of a phase locked loop circuit. A reduction in the power consumed by the charge pump is achieved by synchronizing the powering up of the charge pump bias circuit to the state of the counters which control the timing of the signal which triggers a charge pump cycle. In this way current is supplied to the charge pump circuit only when needed for the operation of the pump. A reduction in the noise present at the output of the charge pump caused by the reloading of the counters while the pump is activated is achieved by loading a portion of the counter bits prior to activating the pump. A circuit detects when the counter is close to a value of zero and produces a signal which loads the most significant bits of the counter. When the counter reaches a value of zero, the remaining bits are loaded. This reduces the number of counter bits which are loaded while the pump circuit is active, thus reducing the switching noise present on the pump output.

REFERENCES:
patent: 5036216 (1991-07-01), Hohmann et al.
patent: 5351015 (1994-09-01), Masumoto et al.

Affiliated with

Also associated with

Rating

Apparatus for reducing power consumption of device controlled by does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for reducing power consumption of device controlled by, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for reducing power consumption of device controlled by will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2204827