Wing H Liu

US Patent:

6750357, Jun 15, 2004

Filed:

Jun 25, 1999

Appl. No.:

09/344226

Inventors:

Ronald H. Chiarello - Castro Valley CA
Wing Liu - Belmont CA
Kathy E. Yokobata - Sunnyvale CA

Assignee:

SynGen, Inc. - San Carlos CA

International Classification:

C07D31178

US Classification:

549394, 436172, 436800

Abstract:

Fluorescent dyes based on rhodamine are derivatized to form labeled conjugates that fluoresce upon excitation with light of an appropriate wavelength. Particularly preferred embodiments are certain single isomer form rhodamine phosphoramidites. These rhodamine phosphoramidites enhance the efficiency of synthesizing rhodamine-labeled oligonucleotides by solid phase methods. Conjugate embodiments of the invention are prevented from being converted to a non-fluorescent lactam form due to having a fully substituted amide linkage derived from the 3-position carboxylate.

US Patent:

7002423, Feb 21, 2006

Filed:

Jul 20, 2004

Appl. No.:

10/710549

Inventors:

Boris Drakhlis - Mountain View CA, US
Wing Faat Liu - San Jose CA, US
Craig M. Taylor - Pleasanton CA, US
Tony Yeung - Milpitas CA, US

Assignee:

Pericom Semiconductor Corp. - San Jose CA

International Classification:

H03B 5/32

US Classification:

331158, 331116 R, 331116 FE, 331 74, 331107 A

Abstract:

A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of the product gm×(Xc)×(Xc) is greater than the effective reactance of the crystal, where gm is the gain of the amplifier attached to the phase-shift legs, and Xc and Xc are the effective capacitive reactances of phase-shift legs at nodes X and X. The third overtone is doubled by a multiplier and the final output filtered to remove the third overtone and select a frequency six times the fundamental frequency. A pair of Colpitts or Pierce amplifier half circuits is attached to the phase-shift leg nodes. The leg nodes can be capacitively isolated from Pierce-amplifier circuit nodes to improve start-up. Frequency doubling can be performed by summing currents from the two oscillator half circuits.

US Patent:

7332977, Feb 19, 2008

Filed:

Dec 21, 2005

Appl. No.:

11/306262

Inventors:

Boris Drakhlis - Mountain View CA, US
Wing Faat Liu - San Jose CA, US
Craig M. Taylor - Pleasanton CA, US
Tony Yeung - Milpitas CA, US

Assignee:

Pericom Semiconductor Corp. - San Jose CA

International Classification:

H03B 27/00

US Classification:

331 46, 331 49, 331 53, 331158, 331116 R, 331116 FE, 331 74

Abstract:

A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of the product gm×(Xc)×(Xc) is greater than the effective reactance of the crystal, where gm is the gain of the amplifier attached to the phase-shift legs, and Xc and Xc are the effective capacitive reactances of phase-shift legs at nodes X and X. The third overtone is doubled by a multiplier and the final output filtered to remove the third overtone and select a frequency six times the fundamental frequency. A pair of Colpitts or Pierce amplifier half circuits is attached to the phase-shift leg nodes. The leg nodes can be capacitively isolated from Pierce-amplifier circuit nodes to improve start-up. Frequency doubling can be performed by summing currents from the two oscillator half circuits.

US Patent:

8442106, May 14, 2013

Filed:

Jul 13, 2010

Appl. No.:

12/834913

Inventors:

Wing Faat Liu - Milpitas CA, US
Freeman Y. Zhong - San Ramon CA, US
Lizhi Zhong - Sunnyvale CA, US
Eric Zhang - Fremont CA, US

Assignee:

LSI Corporation - San Jose CA

International Classification:

H04L 27/01

US Classification:

375233, 375234

Abstract:

An apparatus including a first circuit and a second circuit. The first circuit may be configured to determine values for a predefined metric for a plurality of tap positions within a range covered by a decision feedback equalizer (DFE). The values for a number of taps may be determined in parallel. The second circuit may be configured to set one or more floating taps of the DFE to tap positions based upon the values of the predefined metric. The floating taps in the decision feedback equalizer may be selected adaptively.

US Patent:

20140169439, Jun 19, 2014

Filed:

Dec 14, 2012

Appl. No.:

13/715629

Inventors:

ALTERA CORPORATION - , US
Wing LIU - Milpitas CA, US

Assignee:

ALTERA CORPORATION - San Jose CA

International Classification:

H04L 25/03

US Classification:

375233, 375230

Abstract:

One embodiment relates to an equalizer circuit for a data link. The equalizer circuit including a continuous-time linear equalizer, a first circuit loop, and a second circuit loop. The continuous-time linear equalizer receives a received signal and outputs an equalized signal. The first circuit loop determines a first average signal amplitude. The first average signal amplitude may be an average signal amplitude of the equalized signal. The second circuit loop a second average signal amplitude. The second average signal amplitude may be an average signal amplitude of a high-frequency portion of the equalized signal. Other embodiments and features are also disclosed.