Realtek Semiconductor Inc.

Pixart Imaging Incorporated

Pixart Imaging Incorporation

Mei-Chao Yeh

Liang-Wei Huang

Chien-Jung Chou

Wen-Cheng Yen

Ta-Chin Tseng

Ting-Fa Yu

Li-Han Liang

Chien-Sheng Lee

The present disclosure illustrates an image sensor. The image sensor includes an image sensing array and a voltage supply array. The image sensing array and the voltage supply array are coupled to an analog-to-digital converter array. The image sensing array captures image data. The image sensing array supports one of a rolling shutter mechanism and a global shutter mechanism according to setting. The voltage supply array includes a plurality of voltage supply circuits to supply dummy voltage. During an auto-zero period, the voltage supply array provides the dummy voltage to the analog-to-digital converter array. Pluralities of comparators of the analog-to-digital converter array execute an auto-zero function based on the dummy voltage. After finishing the auto-zero function, the image sensing array outputs the image data to the analog-to-digital converter array. The analog-to-digital converter array makes the image data be digital.

Image sensor and image capture device supporting rolling shutter mechanism and global shutter mechanism

A method for reducing fixed pattern noise of an image sensor is provided. The method includes: accessing pixel data of at least one test frame in a test environment; and calculating/deriving average values of each column based on at least one portion of pixel data of the column in the at least one test frame, wherein the average values of columns are used as calibration values for calibrating image pixel data of columns when the image sensor operates in a normal light source environment.

Method and apparatus for reducing fixed pattern noise of image sensor in digital domain

The present invention provides an image sensor circuit with a power noise filtering function and a control method thereof. The image sensor circuit includes: an image sensing unit, for sensing an image, to generate an image sensed signal; a power noise sensing unit, for sensing a power noise, to generate a power noise signal; a differential amplifier circuit, which is coupled to the image sensing unit and the power noise sensing unit, for receiving the image sensed signal and the power noise signal, to generate a differential filtered signal by a differential amplification operation between the image sensed signal and the power noise signal; and an analog-to-digital converter (ADC) circuit, which is coupled to the differential amplifier circuit, for receiving the differential filtered signal, to generate a digital image signal.

Image sensor circuit with power noise filtering function and control method thereof

The disclosure is a device and a method for Non Return to Zero (NRZ) Clock Data Recovery (CDR) calibration, which includes a CDR unit and a weight calculator unit. The CDR unit receives a compensative signal of an equalization filter to generate an error signal, a sampling clock signal, a transition sampling signal and a data signal. The weight calculator unit receives the error signal, the transition sampling signal and the data signal, and then uses a run length technique to generate weight data. The weight data controls a voltage control oscillator (VCO) which calibrates the phase and the frequency of the sampling clock signal.

Device and method for NRZ CDR calibration

The disclosure is a device and a method for receiver-equalizer calibration, in which the device includes an adaptive filter, a Clock Data Recovery (CDR) unit, an adaptive control unit and a run length encoding unit. The adaptive filter receives a channel signal, calibrates the channel signal according to a filter control signal and compensates the channel signal to obtain a compensative signal. The CDR unit receives the compensative signal to generate a sampling clock signal, a data signal and a transition sampling signal. The run length encoding unit receives the data signal and run-length encodes the data signal to generate first code data and second code data. The adaptive control unit receives the first code data, the second code data, the data signal and the transition sampling signal, and performs weight calculation to adjust the filter control signal.

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Hsinchu, Taiwan

Mei-Chao Yeh