Resumes
Resumes
Zhong Mo Phones & Addresses
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815 12Th St, Oakland, CA 94607 (510) 251-8201
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540 21St St, Oakland, CA 94612 (510) 251-8201
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Union City, CA
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988 Franklin St, Oakland, CA 94607 (510) 663-0484
Work
Position:
Production Occupations
Publications
Us Patents
High Resolution, High Sensitivity Image Scanner Having Noise Cancellation Improvements
View pageUS Patent:
20050094222, May 5, 2005
Filed:
Oct 29, 2003
Appl. No.:
10/697854
Inventors:
Hsin-Fu Tseng - Los Altos CA, US
Zhong Mo - Belmont CA, US
Zhong Mo - Belmont CA, US
International Classification:
H04N001/04
US Classification:
358483000
Abstract:
A Contact Image Sensor (CIS) system with high resolution, high sensitivity, low noise, low-power dissipation, and low-cost scanning has a CIS pixel structure that utilizes a junction photodiode as a detector element and a single-stage, high-gain, low-power inverter functioning as a charge integrating amplifier. The inverter clamps the photodetector at a fixed bias voltage and removes any signal charge generated by the incident light. A very small integrating capacitor is used on the integrating inverter amplifier for high pixel gain. The pixel further includes a noise cancellation circuit to eliminate the reset noise of the integrating capacitor. The pixel signal is then read out by a differential stage to cancel the dark offset. This structure allows the implementation of high-performance CIS arrays using low-cost standard CMOS manufacturing process. Furthermore, the present invention allows easy implementation of a lower resolution array with higher sensitivity and scanning speed and as a result, an array with user controllable resolutions can be realized. An interdigitated array structure is used to enable the array to have high sensitivity (three times that of prior art arrays) with smaller chip size. The interdigitated array can be manufactured using a trailing-edge CMOS process with lower cost than conventional contiguous arrays. The interdigitated array structure also permits the implementation of a user controllable multi-resolution scanning system.
Circuit Having An Input Terminal For Controlling Two Functions
View pageUS Patent:
57195242, Feb 17, 1998
Filed:
Oct 11, 1995
Appl. No.:
8/540816
Inventors:
Zhong Heng Mo - Daly City CA
Brian Gillings - San Jose CA
Brian Gillings - San Jose CA
Assignee:
TelCom Semiconductor, Inc. - Mountain View CA
International Classification:
G05F 110
US Classification:
327545
Abstract:
An integrated circuit providing two output functions from a single output controlled by an input with a single switch responsive to an input level.
Switched High-Slew Rate Buffer
View pageUS Patent:
55128505, Apr 30, 1996
Filed:
Sep 30, 1994
Appl. No.:
8/316161
Inventors:
Zhong H. Mo - Daly City CA
Assignee:
TelCom Semiconductor, Inc. - Mountain View CA
International Classification:
H03B 100
US Classification:
327108
Abstract:
A buffer circuit having both high gain and high slew rate is implemented using a high gain-low slew rate amplifier and a switch network. The buffer circuit's operation is divided into three periods. During the first period, the output of the amplifier is isolated from the load to allow the amplifier's output voltage to more quickly reaches its final voltage level. During the second period, the switch network couples the amplifier output lead to the load input lead where the amplifier drives the voltage at the load's input lead to a voltage substantially equal to the voltage of the input signal. During the third period, the switch network isolates the amplifier from the load and couples the load's input lead to a source of ground potential to quickly slew the load's input lead to ground potential.
Integrator System With Variable Gain Feedback
View pageUS Patent:
55193528, May 21, 1996
Filed:
Sep 30, 1994
Appl. No.:
8/316283
Inventors:
Zhong H. Mo - Daly City CA
Assignee:
TelCom Semiconductor, Inc. - Mountain View CA
International Classification:
H03M 152
US Classification:
327345
Abstract:
An integrating circuit includes first and second amplifiers for use during a zero-integrate mode and a X10 mode, respectively. The first amplifier is a low gain amplifier to ensure stability, whereas the second amplifier is a high gain amplifier to improve accuracy. During the zero-integrate mode, switches couple an integrator input lead to the first amplifier output lead and decouple it from the second amplifier output lead. During the X10 mode, the switches decouple the integrator input lead from the first amplifier output lead and couple it to the second amplifier output lead.