Charles Chu, 445415 Cambury Ave, Temple City, CA 91780

6533255, Mar 18, 2003

Oct 23, 2001

09/980985

Masato Mitsuhashi - Irvine CA
Charles Y. Chu - Rolling Hills Estates CA

Hitachi Chemical Research Center, Inc. - Irvine CA
The Regents of the University of California - Oakland CA

F02M 1500

261149, 261151, 261152, 261153, 261155, 261435, 261 6, 261 911, 261 912

An apparatus for temperature control of biological/chemical samples employing liquid metal is described. A gallium-indium alloy may be used to provide excellent temperature control. Methods of using liquid metal to provide temperature control for biological/chemical samples are also described. A preferred use for the described liquid metal-heating apparatus is to provide precise temperature control for polymerase chain reaction (PCR).

6937783, Aug 30, 2005

Oct 28, 2002

10/282612

Charles Chu - Irvine CA, US
Jingyu Zhou - Irvine CA, US

G02B006/26
G02B006/42

385 18

An optical cross-connect switch includes a switching mirror, a lens mount for securing an optical fiber collimating lens so that a light path from the optical fiber collimating lens is in an alignment relative to the switching mirror and a second lens, and an actuator. The actuator is connected to the switching mirror. The actuator comprises a flexure, and a mechanical motion amplifier. The switching mirror is attached to the mechanical motion amplifier in a thermally stable manner. Mechanical motion of the actuator is damped using a damping fluid. Repeatability of actuator motion is provided for switching the switching mirror into and out of the light path.

6947629, Sep 20, 2005

Mar 7, 2003

10/383958

Charles Chu - Irvine CA, US
Jingyu Zhou - Irvine CA, US
Michael Young - Irvine CA, US

Transoptix, Inc. - Irvine CA

G02B006/35

385 18, 385 17, 385 24, 385 47, 385 50

A feedback control system for an optical switch includes a reference mirror that reflects a signal wavelength of light and transmits a reference wavelength. A detector array indicates positions, on the reference mirror, of first and second reference light beams transmitted through the reference mirror onto the detector array. An array of adjustable mirrors is controlled by a controller for adjusting each mirror in the array. The controller receives the position of the first reference light beam and adjusts a first mirror so that the first position is moved to a pre-determined location on the detector array, and receives the position of the second reference light beam and adjusts a second mirror so that the second position is moved to the same pre-determined location on the detector array, forming an aligned optical path on which a signal light beam can be transmitted through the optical switch.

6996488, Feb 7, 2006

Oct 15, 2002

10/271663

Charles Chu - Irvine CA, US
Michael Young - Irvine CA, US

Advanced Custom Sensors, Inc. - Irvine CA

G06F 19/00

702107, 341120

A sensor signal conditioner for temperature compensating, linearizing, and amplifying sensor signal output in electronic instrumentation circuits includes a programmable gain instrument amplifier having an input connected to a sensor; and a comparator for comparing an output voltage of the amplifier to a desired output voltage value. A micro-controller controls the instrument amplifier gain and offset. A mode switch converts an I/O pin to input the desired output voltage value in programming mode and connects the I/O pin to the amplifier output in user mode. A memory stores a programming protocol in the sensor signal conditioner so that in programming mode, the protocol stores programmed values and linearly fits the programmed values to set trim values for temperature compensating, linearizing, and amplifying the instrument amplifier output. The I/O pins and mode switches of several sensor signal conditioners can be controlled simultaneously to mass produce transducers using the sensor signal conditioner.

7352032, Apr 1, 2008

Aug 16, 2006

11/504990

Charles Chu - Diamond Bar CA, US
Marcel ter Beek - Pleasanton CA, US

National Semiconductor Corporation - Santa Clara CA

H01L 23/62

257355, 257288, 257107, 257173

The drains of the PMOS transistor and the NMOS transistor of a driver are separated and connected to two spaced-apart pins. The spaced-apart pins provide ESD protection to the NMOS transistor, which can be turned on during an ESD event by voltages that propagate through the PMOS transistor during the ESD event.

7486494, Feb 3, 2009

Aug 16, 2006

11/504991

Charles Chu - Diamond Bar CA, US
Marcel ter Beek - Pleasanton CA, US

National Semiconductor Corporation - Santa Clara CA

H02H 5/04
H02H 1/00

361104

A chip which utilizes a silicon controlled rectifier (SCR) for ESD protection prevents a latchup condition from occurring when the SCR misfires and turns on during normal operation by utilizing a fuse in series with the SCR. The fuse allows the SCR to perform normally during an ESD event, but blows if the SCR misfires and attempts to pull a pin voltage down to the holding voltage.

2003004, Mar 6, 2003

Sep 3, 2002

10/233982

Eugene Worley - Irvine CA, US
Charles Chu - Irvine CA, US

G02B027/00

250/551000

Flyback power supplies require three chip integrated circuits to control the switching cycles on the primary of a transformer including a chip that detects when a voltage threshold and optionally when a current threshold has been crossed on the secondary side of the transformer, an opto-coupler to isolate the secondary to primary feedback from the first chip, and a switch control circuit that receives the feedback information from the opto-coupler and uses the information to modulate the primary pulses in order to regulate the secondary voltage and to optionally set a current compliance limit on the secondary current. This invention shows how these three integrated circuits can be combined into one package using silicon based LEDs. Furthermore, circuit techniques are presented that allow the detection of low level light produced by silicon based LEDs. These techniques include disconnecting the power supply from sensing circuits and using a charge capacitor for power and performing the sensing operation during a period of time when clocked digital circuits are inactive.

2004005, Mar 25, 2004

Mar 20, 2003

10/393907

Charles Chu - Irvine CA, US
Jingyu Zhou - Irvine CA, US
Michael Young - Irvine CA, US

Advanced Optical MEMS, Inc. - Irvine CA

G02B006/35
G02B006/34

385/017000, 385/036000

An optical communication system includes an input optical fiber, an output optical fiber, and first and second Risley prism pairs disposed in an optical path between the input optical fiber and the output optical fiber. A first actuator is configured to independently rotate a first and a second prism of the first Risley prism pair so that a first light beam is steered to be incident on the second Risley prism pair by adjusting the first Risley prism pair. A second actuator is configured to independently rotate a third and a fourth prism of the second Risley prism pair so that a second light beam is steered to be incident on the first Risley prism pair by adjusting the second Risley prism pair, providing optical beam alignment of the optical path for communication and optical switching.