Yang M Zhao, 392117 Oakland Rd, San Jose, CA 95131

6995615, Feb 7, 2006

May 20, 2004

10/850504

Yang Zhao - Fremont CA, US

Elantec Semiconductor, Inc - Milpitas CA

H03F 3/08

330308, 330288

Current-mode preamplifiers are provided. In accordance with an embodiment, a current-mode preamplifier includes a transistor, that acts as an input stage for the preamplifier, and a pair of current mirrors. The transistor includes a gate connected to the input of the preamplifier, a source connected to a first voltage supply rail, and a drain. The first current mirror, which is connected to a second voltage supply rail, includes an input connected to the drain of the first transistor, and an output. The second current mirror, which is connected to the first voltage supply rail, includes an input connected to the output of the first current mirror, a first output connected to the input of the preamplifier, and a second output connected to the output of the preamplifier.

7180048, Feb 20, 2007

Dec 30, 2005

11/322313

Yang Zhao - Fremont CA, US

Intersil Americas Inc. - Milpitas CA

H01L 31/00

250214R

Systems and methods for slow tail compensation are provided. A photodetector signal is pre-amplified to thereby produce an uncompensated photodetector signal that includes a fast component and a slow component. The fast component is removed from the uncompensated photodetector signal to thereby produce a compensating signal that includes the slow component of the uncompensated photodetector signal. The compensating signal is subtracted from the uncompensated photodetector signal to thereby produce a compensated photodetector signal that includes the fast component but not the slow component.

7317674, Jan 8, 2008

Mar 10, 2004

10/797261

Theodore D. Rees - Mountain View CA, US
Alexander Fairgrieve - Menlo Park CA, US
Bill R. Tang - San Jose CA, US
Barry Harvey - Los Altos CA, US
Yang Zhao - Fremont CA, US

Intersil Americas Inc. - Milpitas CA

G11B 7/12

369 5327, 369121, 369 475, 369116, 369 4752, 369 4755, 369 4753, 369 5912, 369 5911

Optical pick-up units and laser drivers are disclosed, which can be used in various types of information recording/reproducing apparatuses, such as, but not limited to, DVD and CD drives, DVD camcorders, and DVD video recorders. A laser driver integrated circuit (LDIC) includes an automatic power controller, a running optical power controller, and a write strategy generator. The LDIC can be part of a chip-set, to be located on an optical pick-up unit (OPU). The chip-set can also include a power monitor integrated circuit (PMIC) to monitor the laser diode, and a photo-detector integrated circuit (PDIC) to detect light produced by the laser diode. The PMIC and the PDIC each include their own offset, gain and sample-and-hold circuitry.

7423252, Sep 9, 2008

Jan 9, 2007

11/621506

Yang Zhao - Fremont CA, US

Intersil Americas Inc. - Milpitas CA

H01L 31/00

250214R

Systems and methods for slow tail compensation are provided. A photodetector signal is pre-amplified to thereby produce an uncompensated photodetector signal that includes a fast component and a slow component. The fast component is removed from the uncompensated photodetector signal to thereby produce a compensating signal that includes the slow component of the uncompensated photodetector signal. The compensating signal is subtracted from the uncompensated photodetector signal to thereby produce a compensated photodetector signal that includes the fast component but not the slow component.

7424826, Sep 16, 2008

Nov 10, 2005

11/271035

Yaping Hua - Wuxi, CN
Leyue Jiang - Wuxi, CN
Yongyao Cai - Acton MA, US
Albert Leung - Burnaby, CA
Yang Zhao - Andover MA, US

Memsic, Inc. - N. Andover MA

G01P 15/00

7351405, 7351416, 73488, 7351409

Single chip 3-axis thermal accelerometer devices include a substrate, at least one cavity etched in the substrate, a fluid disposed in the cavity, a bridge structure suspended over an opening of the cavity, and a plurality of heater elements and temperature sensing elements disposed on the bridge structure. The substrate has a substantially planar surface defined by X and Y coordinate axes, and the bridge structure is suspended over the opening of the cavity in the X-Y plane. In one embodiment, the bridge structure is configured to position at least two of the temperature sensing elements out of the X-Y plane. The heater and temperature sensing elements are disposed on the bridge structure in optimized arrangements for providing reduced temperature coefficients and for producing output voltages having reduced DC offset and drift.

8146423, Apr 3, 2012

May 12, 2010

12/778258

Yongyao Cai - Acton MA, US
Yang Zhao - Andover MA, US

MEMSIC, Inc. - Andover MA

G01P 9/00

7350405

An ion discharge gyroscope measures rotational motion and linear acceleration by generating symmetrical ion jet streams and measuring respective amounts of the jet streams impinging on detectors located so as to intercept the ion jet streams. The ion jet streams will be diverted by operation of the Coriolis effect and the differences in the amount of each ion jet stream impinging on the detectors is an indication of rotational motion and linear acceleration. In one embodiment, the ion jet streams are heated and the respective temperatures of the detectors are measured. In another embodiment, the amounts of current flowing through each detector, as contributed by the ion jet streams, are measured and used to determine rotation and acceleration.

8525514, Sep 3, 2013

Mar 19, 2010

12/727616

Yongyao Cai - Acton MA, US
Jerome S. Marcelino - Mountain View CA, US
Yang Zhao - Andover MA, US
Mark Laich - Boston MA, US
Haidong Liu - Jiangsu, CN
Zongya Li - Jiangsu, CN

Memsic, Inc. - Andover MA

G01R 33/02

324252

A magnetometer with only a SET operation for initiating a magnetic orientation within a magnetic field sensor based on anisotropic magnetoresistive (AMR) technology. Within the magnetometer, the relative orientations of the respective X, Y and Z axes detectors are maintained by a package in which all detectors are mounted on a single assembly with the Z axis sensor displaced and held orthogonal to the other two sensors by potting material. Shorting bars on respective barber pole structures are provided with a geometry that allows for closer placement of adjacent barber poles to one another. The barber pole structures are deposited in a nested orientation which provides for balanced resistance legs in a Wheatstone bridge construction.

2004008, May 13, 2004

Feb 21, 2003

10/370950

Mark Rubin - San Jose CA, US
Yang Zhao - Fremont CA, US

H01L031/00

250/214100

A photodetector includes a first conductivity type semiconductor material (e.g., a p-type material) and one or more regions of semiconductor material of a second conductivity type (e.g., regions of n-type material), each forming a pn junction with the first conductivity type semiconductor material. The one or more regions collectively have a first layout area. One or more further regions of semiconductor material of the second conductivity type (e.g., further regions of n-type material) each form a pn junction with the first conductivity type semiconductor material. The one or more further regions collectively having a second layout area. A light blocking material covers the one or more further regions. The first layout area is greater than the second layout area.