Pixart Imaging Incorporated

Pixart Imaging (penang) Sdn. Bhd.

Kei Tee Tiew

Sung-Han Wu

Keen-Hun Leong

Shan Chong Tan

Wooi Kip Lim

Balasubramaniam Shammugasamy

A short circuit testing method for a capacitive sensing device including a plurality of sense lines and a plurality of drive lines includes: under a short circuit testing mode, coupling at least one first line in the sense lines and drive lines to a reference level; using a sensing circuit corresponding to a specific sense line to read out a testing resultant signal; and, comparing the testing resultant signal with a reference signal to determine whether a short circuit exists.

Short circuit testing method for capacitive sensing device and the capacitive sensing device

An amplifier circuit comprising: a first amplifier, comprising a voltage input terminal and a voltage output terminal; a voltage offset providing circuit, comprising a first terminal coupled to a first predetermined voltage source, a second terminal coupled to the voltage output terminal, and a third terminal, wherein a voltage at the third terminal is higher than a voltage at the second terminal by an offset voltage; and a voltage control capacitor, comprising a fourth terminal coupled to the third terminal, and a fifth terminal coupled to the voltage input terminal, wherein a capacitance value of the voltage control capacitor corresponds to a voltage difference between a voltage at the fifth terminal and a voltage at the fourth terminal. A better compensation for the amplifier circuit can be acquired since a voltage control capacitor having a capacitance value corresponding to the output voltage of the amplifier is applied.

Amplifier circuit and transimpedance amplifier circuit

A method of an image sensor device includes: using a pixel array of the image sensor device to sense and generate at least one dark image; computing pixel statistics according to the at least one dark image; and, determining which one of a plurality of temperature ranges a temperature of the image sensor device falls within according to the pixel statistics.

Image sensor device and method capable of detecting actual temperature range in which the image sensor device is being operated without using accurate temperature sensor

A pipelined ADC incorporating variable input gain has a novel first stage generating a first digital output and a residue according to an analog input. The first stage comprises a novel MDAC. The MDAC comprises an operational amplifier, a feedback capacitor, a first sampling capacitor and a second sampling capacitor. First terminals of the feedback capacitor, the first sampling capacitor and the second sampling capacitor are connected to an inverted input terminal of the operational amplifier. A non-inverted input terminal of the operational amplifier is connected to a ground. In a sampling phase, second terminals of the feedback capacitor, the first sampling capacitor and the second sampling capacitor are connected to the analog input. In a charge transferring phase, second terminals of the feedback capacitor, the first sampling capacitor and the second sampling capacitor are respectively connected to the output terminal, a flash ADC output and the ground.

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Penang, Malaysia

Kei Tee Tiew