Richard Ronald Pierson

US Patent:

6570406, May 27, 2003

Filed:

Nov 13, 2001

Appl. No.:

10/010825

Inventors:

Benjamim Tang - Hawthorne CA
Richard C. Pierson - Newport Beach CA

Assignee:

Primarion, Inc. - Tempe AZ

International Classification:

H03K 19003

US Classification:

326 86, 326 26, 326 27, 326 29

Abstract:

A method and circuit for pre-emphasis equalization of a high speed data communication system can be provided through the use of programmable pulse shaping. A data communication system configured with the pre-emphasis equalization circuit operates by receiving an input data stream and outputting a data stream for transmission through an interconnect or other transmission channel. The data can be passed through an output buffer configured with programmable pre-emphasis equalization, having input inverters at an input stage and output inverters at an output stage. During operation, once an input signal to the input stage transitions, for example from a low to a high state, an input signal to the output stage is configured to a full amplitude to drive the transmission channel. Once the output stage transitions to a full amplitude, the input of the output stage is configured closer to a mid-scale amplitude. The amount of amplitude change from full scale back to mid-scale determines the amount of equalization to be provided by the output buffer to the transmission channel.

US Patent:

6794900, Sep 21, 2004

Filed:

Jul 24, 2002

Appl. No.:

10/205340

Inventors:

Benjamim Tang - Hawthorne CA
Richard C. Pierson - Newport Beach CA

Assignee:

Primarion, Inc. - Tempe AZ

International Classification:

H03K 19003

US Classification:

326 86, 326 26, 326 27, 326 29

Abstract:

A method and circuit for pre-emphasis equalization of a high speed data communication system can be provided through the use of programmable pulse shaping. A data communication system configured with the pre-emphasis equalization circuit operates by receiving an input data stream and outputting a data stream for transmission through an interconnect or other transmission channel. The data can be passed through an output buffer configured with programmable pre-emphasis equalization, having input inverters at an input stage and output inverters at an output stage. During operation, once an input signal to the input stage transitions, for example from a low to a high state, an input signal to the output stage is configured to a full amplitude to drive the transmission channel. Once the output stage transitions to a full amplitude, the input of the output stage is configured closer to a mid-scale amplitude. The amount of amplitude change from full scale back to mid-scale determines the amount of equalization to be provided by the output buffer to the transmission channel.

US Patent:

20200083813, Mar 12, 2020

Filed:

Sep 6, 2018

Appl. No.:

16/123364

Inventors:

- Villach, AT
Hongying Ding - Redondo Beach CA, US
Sue Perranoski - Rancho Palos Verdes CA, US
Richard Pierson - Newport Beach CA, US
Darryl Tschirhart - Cambridge, CA

International Classification:

H02M 3/335
H02M 3/158

Abstract:

An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This controller also senses a rectified voltage on the secondary side of the power converter and uses this sensed voltage to detect fault conditions of the primary side. For example, the sensed rectified voltage is used to detect undervoltage or overvoltage conditions of the input power source of the power converter, or faulty power switches within the primary-side power stage.

US Patent:

20200067408, Feb 27, 2020

Filed:

Oct 29, 2019

Appl. No.:

16/667600

Inventors:

- Villach, AT
Chun-Yen Lin - Zhongli City, TW
Rohan Samsi - Redondo Beach CA, US
Jinghong Guo - Torrance CA, US
Tim M. Ng - Monterey Park CA, US
Richard C. Pierson - Newport Beach CA, US

International Classification:

H02M 3/156
G01R 19/00
G01R 35/00

Abstract:

A method of calibrating a regulator includes: measuring at least one of a voltage and a current; comparing the measurement to a nominal value of the at least one of the voltage and the current; generating a correction parameter of the comparison of the measurement to the nominal value; and storing the correction parameter in a local memory of the regulator.

US Patent:

20200067416, Feb 27, 2020

Filed:

Aug 22, 2018

Appl. No.:

16/109254

Inventors:

- Villach, AT
Hongying Ding - Redondo Beach CA, US
Sue Perranoski - Rancho Palos Verdes CA, US
Richard Pierson - Newport Beach CA, US
Darryl Tschirhart - Cambridge, CA

International Classification:

H02M 3/335
H02M 1/44
H02M 1/42

Abstract:

An isolated switched-mode power converter converts power from an input source into power for an output load. Power switches within a primary-side power stage control the amount of power input to the power converter and, ultimately, provided to the output load. A digital controller on the secondary side of the power converter generates signals to control the power switches. This generation is based upon closed-loop (feedback) control as well as feedforward control. The feedforward control compensates for variations in the voltage of the input source. The input voltage is estimated by sensing a rectified voltage at a node between a secondary winding of the isolation transformer and an output filter. The feedforward compensation modifies the generated switch control signals based upon the sensed rectified voltage.

US Patent:

20160181916, Jun 23, 2016

Filed:

Jan 21, 2015

Appl. No.:

14/601401

Inventors:

- Villach, AT
Chun-Yen Lin - Zhongli City, TW
Rohan Samsi - Redondo Beach CA, US
Jinghong Guo - Torrance CA, US
Tim M. Ng - Monterey Park CA, US
Richard C. Pierson - Newport Beach CA, US

International Classification:

H02M 3/156
G01R 35/00
G01R 19/00

Abstract:

Methods and apparatus for a power regulator according to various aspects of the present invention may comprise a sensor adapted to generate a measurement of a voltage or a current. A memory may store a correction parameter that corresponds to the measurement, and a correction system may be adapted to adjust the measurement according to the correction parameter.