A current-mode ADC with adaptive quantization
暂无分享,去创建一个
The paper presents an analog to digital converter (ADC) targeted for converting current-mode discrete cosine transform (DCT) coefficients to digital bits. The conversion is performed in parallel and the operation is continuous in time. Adaptive quantization is included in the converter to fulfil the demands of several video compression standards. The design has relatively low power consumption and the maximum conversion accuracy is 7 1/2 bits.
[1] Z. Wang. Novel pseudo RMS current converter for sinusoidal signals using a CMOS precision current rectifier , 1990 .
[2] Ari Paasio,et al. Realization of an analog current-mode 2D DCT , 2004, 2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512).
[3] Akira Matsuzawa,et al. A CMOS image sensor with analog two-dimensional DCT-based compression circuits for one-chip cameras , 1997, IEEE J. Solid State Circuits.