Samsung Electronics Co., Ltd.

Yonsei University

Jimin Cheon

Seog Heon Ham

Youngcheol Chae

Gunhee Han

In Hee Lee

An image sensor includes an analog-to-digital converter (ADC) and a decimation filter. The decimation filter includes a first digital data generator and a second digital data generator. The first digital data generator is configured to integrate sigma-delta modulated M-bit pixel data and output N-bit pixel data based on an integration result. The second digital data generator is configured to integrate the N-bit pixel data, generate P-bit pixel data based on an integration result, and output the P-bit pixel data as decimated data.

Decimation filters, analog-to-digital converters including the same, and image sensors including the converters

A method and apparatus are provided for sigma-delta (&#x3a3;&#x394;) analog to digital conversion, the method including receiving an analog signal, sampling the received signal, comparing the sampled signal with a constant reference voltage, providing at least one high-order bit responsive to the constant reference comparison, comparing the sampled signal with a variable reference voltage, providing at least one low-order bit responsive to the variable reference comparison, and combining the at least one high-order bit with the at least one low-order bit; and the apparatus including a comparator, a first ADC portion supplying the comparator with a constant reference voltage for providing at least one high-order bit, and a second ADC portion supplying the comparator with a variable reference voltage for providing at least one low-order bit.

Growing community of inventors

Yongin-si, South Korea

Jimin Cheon