Karl F Jacobs

US Patent:

6456153, Sep 24, 2002

Filed:

May 4, 2001

Appl. No.:

09/849323

Inventors:

Paul E. Buck - Tecumseh MI
Karl H. Jacobs - Torrington CT
Barry J. Male - West Granby CT

Assignee:

Texas Instruments Incorporated - Dallas TX

International Classification:

G05F 110

US Classification:

327536

Abstract:

A regulated integrated circuit power supply ( ) intermittently applies feedback to a charge pump ( ) on a sampled basis such that a feedback circuit ( ) is enabled to sense the bias voltage (V ) at predetermined intervals of time. Based upon the value of the bias voltage (V ) as compared to a threshold voltage (V ), the charge pump ( ) is enabled to supply a voltage to the integrated circuit. Thereby, the regulated charge pump ( ) does not overload the integrated circuit coupled thereto. The regulated integrated circuit power supply ( ) includes the charge pump ( ) coupled to the integrated circuit to supply bias voltage (V ). Additionally, coupled to the integrated circuit, the feedback circuit ( ) senses the bias voltage (V ) and provides an output signal based upon a comparison between the bias voltage (V ) and a voltage threshold (V ) A switch ( ) connected to the feedback circuit ( ) selectively enables and disables sensing of the bias voltage (V ). A signal generator ( ) provides at least one output signal. A controller ( ) receives both output signals from the signal generator ( ) and the feedback circuit ( ) to provide a first and a second control signal (V , V ).