Title :
Superconducting delta-sigma oversampling A/D converter
Author :
Xiao, P.H. ; Van Duzer, T.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., California Univ., Berkeley, CA, USA
fDate :
3/1/1993 12:00:00 AM
Abstract :
A superconducting delta-sigma analog-to-digital (A/D) converter is presented. The converter uses a low-pass filter instead of the integrator found in the usual delta-sigma architecture. The converter is analyzed by a behavior-level simulation package as well as the circuit simulator JSIM. Its performance is compared to that of the standard first-order delta-sigma converter. The simulation shows that this converter can achieve a 70-dB signal-to-noise ratio (S/(N+D)) with an oversampling ratio of 128. This corresponds to an 11-b resolution. The signal bandwidth is 4 MHz if the sampling rate is 1 GHz.<>
Keywords :
SQUIDs; analogue-digital conversion; delta modulation; superconducting integrated circuits; 1 GHz; 4 MHz; 70 dB; JSIM; behavior-level simulation package; circuit simulator; delta-sigma ADC; low-pass filter; oversampling A/D converter; Analog-digital conversion; Analytical models; Bandwidth; Circuit simulation; Low pass filters; Packaging; Sampling methods; Signal resolution; Signal to noise ratio; Superconducting filters;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
