Title :
Analysis of timing jitter in bandpass sigma-delta modulators
Author :
Tao, Hai ; Tóth, Lászlo ; Khoury, John M.
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
fDate :
8/1/1999 12:00:00 AM
Abstract :
The effect of clock jitter on the dynamic range of discrete-time (DT) and continuous-time (CT) sigma-delta modulators is addressed. It is shown that clock jitter in DT modulators mixes with the input signal, while for CT modulators, the jitter mixes with the out-of-band quantization error and elevates the passband noise. The signal-to-noise ratio of CT modulators is shown to be more susceptible to clock jitter than their DT counterparts. Analytical and simulation results are provided
Keywords :
clocks; phase noise; quantisation (signal); sigma-delta modulation; timing jitter; bandpass sigma-delta modulators; clock jitter; continuous-time modulators; discrete-time modulators; input signal; out-of-band quantization error; passband noise; signal-to-noise ratio; timing jitter; Analog-digital conversion; Analytical models; Circuits; Clocks; Degradation; Delta-sigma modulation; Dynamic range; Frequency conversion; Microelectronics; Timing jitter;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
