High-resolution superconductive serial analog-to-digital converter for on-focal plane data conversion

Details High-resolution superconductive serial analog-to-digital converter for on-focal plane data conversion High-resolution superconductive serial analog-to-digital converter for on-focal plane data conversion

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3360...28g&link_type=abstract

Proc. SPIE Vol. 3360, p. 28-39, Infrared Readout Electronics IV, Bedabrata Pain; Terrence S. Lomheim; Eds.

Computer Science

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Scientific paper

We have developed a high-resolution, superconducting analog- to-digital converter (ADC) based on phase modulation- demodulation architecture. The circuit is implemented in rapid single flux quantum electronics, using niobium technology. Extremely low on-chip power dissipation makes this ADC attractive for digital readout of cooled IR detectors. The output of the ADC is serially extracted from the chip to minimize the thermal load of input-output cables connecting the cold ADC to the room-temperature data acquisition system. The ADC performance can be enhanced by a multiple channel synchronize and a decimation filter. Designs of the various ADC circuits with increasing complexity and performance are discussed. Experimental results of 12-bit and 16-bit serial ADC circuits are also described. Recent developments in improving the performance of cryogenic laser diodes are discussed in relation to the possibility of optical readout of the ADC output. We also report the development of a compact packaging module for the ADC chip and the laser.

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