Ying Ling Hsu

6370937, Apr 16, 2002

Mar 19, 2001

09/812147

Ying W. Hsu - Huntington Beach CA

Microsensors, Inc. - Costa Mesa CA

G01P 904

73 137

Disclosed is a method of correcting quadrature error in a dynamically decoupled micro-gyro ( ) having a drive mass ( ) that is vibrated relative to a drive axis (Y, Z) and a sense mass ( ) that responds to the drive mass ( ) in the presence of an angular rate and associated coriolis force by vibrating relative to a sense axis (X, Y). The method includes the steps of providing a first static force element ( ) for applying a first steady-state force to a first region of the drive mass ( ); providing a second static force element ( ) for applying a second steady-state force to a second region of the drive mass ( ), and applying a corrective steady-state force to the drive mass ( ) with the first and second static force elements ( ), the corrective steady-state force making the drive axis (Y, Z) of the drive mass ( ) orthogonal to the sense axis (X, Y) of the sense mass ( ). In the rotational embodiment, the static force elements are located at +Y and -Y directions.

6513380, Feb 4, 2003

Jun 19, 2001

09/884880

Ying Wen Hsu - Huntington Beach CA
Phu Cu Dao - Arcadia CA

Microsensors, Inc. - Costa Mesa CA

G01C 1900

07350412, 07350404, 07351429

Disclosed is a MEMS sensor including a sense element and a single anchor that supports the sense element arranged in a central hub-like fashion that reduces the effects of thermal stress. Usually, two or more anchors are required to suitably constrain the sense elements motion. The anchor disclosed herein, however, supports the sense element with connection elements having a connection geometry that substantially limits the motion of the sense element to a single-degree-of-freedom. The connection elements may include, for example, converging flexures, an extender bar, or both.

6578420, Jun 17, 2003

Jun 26, 2000

09/604782

Ying Wen Hsu - Huntington Beach CA

Microsensors, Inc. - Costa Mesa CA

G01C 1900

7350416

A three-axis micro-gyro structure having first and second micro-gyro devices that measure angular velocity around first and second rate axes extending in a plane of the micro-gyro structure and a third micro-gyro that measures angular velocity around a third rate axis perpendicular to the plane of the micro-gyro structure.

6647168, Nov 11, 2003

Oct 19, 2001

10/052829

Ying Wen Hsu - Huntington Beach CA
Arthur R. Telkamp - Irvine CA

Newport Opticom, Inc. - Newport Beach CA

G02B 626

385 16, 385 19, 385 25

An optical switching system that switches the path of an optical signal by moving a microstructure onto which a light-guiding structure is mounted. The microstructure is formed by a MEMs and semiconductor process to be integral to the substrate. The light-guiding structure may include waveguides. The microstructure moves from one position to another position (e. g. , laterally, vertically, rotationally) such that incoming optical signals align over a small air gap to different optical paths, depending on the position of the movable microstructure. As a result, the optical signal propagate along different optical paths (e. g. , straight pass through or cross over) depending on the position of the movable microstructure. The optical paths have a large radii of curvature so as to change the direction of the optical signal gradually, thereby reducing insertion losses. By combining optical switches in both the vertical and horizontal directions, the resulting optical switching system handles switching in three dimensions.

6647170, Nov 11, 2003

Apr 17, 2001

09/837817

Ying Wen Hsu - Huntington Beach CA

Newport Opticom, Inc. - Newport Beach CA

G02B 642

385 17, 385 25, 385 31

An optical switching system that switches optical signals in three dimensions by moving an optically transmissive microstructure. The movable microstructure is âoptically transmissiveâ because it includes structures such as waveguides and waveguide networks. The apparatus uses MEMS and micro-machining technology to build an optical switch having an optically transmissive microstructure which moves from one position to another position in a direction (e. g. , laterally, vertically, rotationally) such that incoming optical signals align over a small air gap with different waveguides, or with different inputs to the waveguides, depending on the position of the movable microstructure. As a result, the optical signals travel different optical paths (e. g. , straight pass through or cross over) depending on the position of the movable microstructure.

6690847, Feb 10, 2004

Apr 17, 2001

09/837829

Ying Wen Hsu - Huntington Beach CA

Newport Opticom, Inc. - Newport Beach CA

G02B 626

385 16, 385 19, 385 25

An optical switching element has a movable optically transmissive microstructure to change the optical paths of the optical signals. The movable microstructure is âoptically transmissiveâ because it includes structures such as waveguides and waveguide networks which transmit optical signals. The apparatus uses MEMS and micromachining technology to build an optical switch having an optically transmissive microstructure which moves from one position to another position in a direction (e. g. , laterally, vertically, rotationally) such that incoming optical signals align over a small air gap with different waveguides, or with different inputs to the waveguides, depending on the position of the movable microstructure. As a result, the optical signals travel different optical paths (e. g. , straight pass through or cross over) depending on the position of the movable microstructure.

6694071, Feb 17, 2004

Sep 5, 2001

09/948179

Ying Wen Hsu - Huntington Beach CA

Newport Opticom, Inc. - Newport Beach CA

G02B 626

385 16

This improved method and apparatus for switching optical signals uses a rotatable optically transmissive microstructure to change the optical paths of optical signals. The rotatable optically transmissive microstructure includes structures such as waveguides and waveguide networks which transmit optical signals. MEMS and micro-machining technology are used to build an optical switch with a microstructure that rotates from one position to another position (e. g. , laterally, vertically, rotationally) such that incoming optical signals align over a small air gap with different waveguides, or with different inputs to the waveguides, depending on the position of the microstructure. As a result, the optical signals travel different optical paths (e. g. , straight pass-through or cross over) depending on the position of the microstructure. The waveguides can be fabricated, for example, by laying a cladding material on a substrate, forming a waveguide on the cladding material, and finally by overlaying a second cladding layer on top.

6731121, May 4, 2004

Aug 19, 2002

10/110889

Ying Hsu - Huntington Beach CA
Christ Saunders - Laguna Niguel CA
Kirk Su - Irvine CA

Microsensors Corp. - Costa Mesa CA

G01R 2726

324678

A transducer interface circuit ( ) for use with a capacitive sensor ( ). The interface circuit ( ), provided on application specific IC, includes numerous trims and adjustments that permit it to operate with a differential, balanced-pair sensors ( A) or a singled-ended sensor ( ). In particular, the circuit ( ) provides a capacitive adjustment section ( ) and a capacitive trans-impedance amplifier section ( ) that are configured with capacitor adjustment controls ( ) and gain adjustment controls ( ) that, along with other controls, are provided as control registers. The capacitive trans-impedance amplifier section ( ) periodically reverses the voltages across the sensor ( ), and the capacitive adjustment section ( ), after blanking a feedback capacitance (CF) that is used to integrate excess charge caused by a difference in capacitance. A low pass filter section provides bandwidth adjustment without requiring any external components. An output buffer section ( ) includes further trim controls for gain and offset, is also governed by an offset selection bit SOFF that adjusts the output range to be optimally suited for the balanced-pair sensors ( A) or a singled-ended sensor ( B).