Pochung Young

US Patent:

61725544, Jan 9, 2001

Filed:

Sep 24, 1998

Appl. No.:

9/160363

Inventors:

Pochung Young - Fremont CA
Li-Chun Li - Los Gatos CA

Assignee:

Mosel Vitelic, Inc. - Hsin Chu

International Classification:

G05F 110

US Classification:

327535

Abstract:

In accordance with the present invention, a circuit provides a bias voltage V1 which is substantially insensitive to variations of a power supply voltage powering the circuit. The circuit includes a detector circuit for generating a signal from the power supply voltage and the bias voltage V1, wherein the signal is substantially insensitive to variations in the power supply voltage while being responsive to the bias voltage V1. The circuit further includes a voltage generator circuit for generating the bias voltage V1 wherein the voltage generator is responsive to the signal such that the detector circuit and the voltage generator maintain the bias voltage V1 at a substantially constant value over power supply voltage variations. The detector circuit also includes a circuit for allowing bias voltage V1 to get arbitrarily close to the ground voltage but not allowing the bias voltage V1 to become positive.

US Patent:

59864745, Nov 16, 1999

Filed:

Jan 12, 1996

Appl. No.:

8/585994

Inventors:

Jinyong Chung - Los Altos Hills CA
Li-Chun Li - Los Gatos CA
Pochung Young - Fremont CA

Assignee:

Mosel Vitelic, Inc.

International Classification:

H03K 190175

US Classification:

326 86

Abstract:

A circuit for generating a voltage for pre-charging a data line. The circuit receives as input an ON/OFF signal which is typically the data bus line equalization control signal. The circuit also receives a varying power voltage. The circuit includes a bleeder which biases the data line at a voltage differing from said varying power voltage by a constant amount when the circuit is ON. The circuit consumes substantially zero power when OFF.

US Patent:

58417184, Nov 24, 1998

Filed:

Aug 8, 1997

Appl. No.:

8/909014

Inventors:

Lynne Watters - Sunnyvale CA
Sharlin Fang - San Jose CA
Pochung Young - Fremont CA

Assignee:

Mosel Vitelic, Inc. - Taiwan

International Classification:

G11C 700

US Classification:

365208

Abstract:

A circuit provides a differential voltage on two nodes. The nodes are precharged by a precharge circuit before every cycle in which the differential voltage is provided. If during the precharge operation, the node voltage at one of the two nodes is within a predetermined range of voltages relative to a supply voltage used in the precharge operation, then the precharge circuit is incapable of precharging the two nodes to the same voltage, Therefore, an equalization transistor is provides between the two nodes to ensure that the two nodes are properly precharged and equalized by the end of the precharge operation.