Negative charge pump feedback circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 25, 2017
Issued Date -
N/A
app pub date -
Dec 21, 2014
filing date -
Jul 18, 2014
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention discloses a negative charge pump feedback circuit, wherein the feedback circuit is connected between an AND gate and the output terminal of the negative charge pump, and a clock signal is connected to the negative charge pump through the AND gate and under the control of the feedback signal, with the feedback circuit including a switch-capacitor circuit and a comparator; a first terminal of a first capacitor of the switch-capacitor circuit is connected to the output terminal of the negative charge pump through a first switch, and grounded through a second switch; a first terminal of a second capacitor is connected to a second terminal of the first capacitor, grounded though a third switch, and connected to the comparator though a fourth switch; an adjustable capacitor is connected in parallel to both terminals of the second capacitor; a positive-phase input terminal of the comparator is connected to a reference voltage. The switch-capacitor circuit is made to switch constantly between two states by the control of four control signals over the four switches, achieving voltage division and positive/negative voltage conversion simultaneously. The present invention can reduce the circuit area, increase the feedback speed, and reduce the output voltage ripple of the charge pump.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully