1961 APPENDIX 1) m-sequences: We use the notation fa a ag to denote the sequence fa 1 ; a 2 ; 111g, and fa a a k g to denote the shifted sequence fa k+1 ; a k+2 ; 1 11g. We consider a binary m-sequence fa a ag with period P. Some properties of m-sequences which will be used in our discussion in Section IV are [10] • A1: One period of an m-sequence contains exactly (P + 1)=2 ones and (P 0 1)=2 z...

In this paper, a novel analog gamma correction scheme with a logarithmic image sensor dedicated to minimize the quantization noise of the high dynamic applications is presented. The proposed implementation exploits a non-linear voltage-controlled-oscillator (VCO) based analog-to-digital converter (ADC) to perform the gamma correction during the analog-to-digital conversion. As a result, the qua...

he ever-dropping cost of Very Large Scale Integrated (VLSI) circuits allows many analog functions to be done digitally. However, the real world still is, and will always continue to be, a fundamentally analog place. Thus, the analog signal of interest is translated into a format that a digital computer can utilize. This translation is the function of an Analog to Digital Converter (ADC). After ...

This paper proposes a generic algorithm for k-bit Analog to Digital Conversion. The proposed algorithm is very fast method of conversion of an analog signal into k-bit digital output in a multi-bit parallel fashion. The algorithm employs m stages, each of which is capable of producing bits such that k/m bits are converted at the same time. Thus, this algorithm can be considered a k = n X m conv...

We demonstrate a new concept for analog-to-digital (A/D) conversion based on photonic time stretch. The analog electrical signal is intensity modulated on a chirp optical waveform generated by dispersing an ultrashort pulse. The modulated chirped waveform is dispersed in an optical fiber, leading to the stretching of its envelope. We have derived analytical expressions for the stretch factor an...