Title :
Increasing the performance of arbitrary waveform generators using periodic sigma-delta modulated streams
Author :
Dufort, Benoit ; Roberts, Gordon W.
Author_Institution :
Microelectron. & Comput. Syst. Lab., McGill Univ., Montreal, Que., Canada
fDate :
2/1/2000 12:00:00 AM
Abstract :
This paper describes a new method to increase the performance of existing arbitrary waveform generators (AWGs). By encoding the digital words using sigma-delta (ΣΔ) techniques, it is possible to decrease the noise floor in a narrow band while keeping the same memory requirements. Calibration techniques to deal with the nonidealities of the AWG are also presented and verified experimentally. Improvements in spurious free dynamic ranges (SFDRs) of over 40 dB will be demonstrated with commercial test equipment
Keywords :
automatic test equipment; calibration; quantisation (signal); sigma-delta modulation; timing jitter; transfer functions; waveform generators; ATE; arbitrary waveform generators; calibration techniques; clock jitter; digital words; encoding; increased performance; narrow band; noise floor; nonidealities; periodic sigma-delta modulated streams; quantization; spurious free dynamic range; transfer function; Automatic testing; Calibration; Circuit testing; Costs; Delta-sigma modulation; Filters; Narrowband; Quantization; Signal generators; Test equipment;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
