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Superconducting bandpass /spl Delta//spl Sigma/ modulator with 2.23 GHz center frequency and 42.6 GHz sampling rate

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4 Author(s)

A superconducting bandpass /spl Delta//spl Sigma/ modulator employing a 2.23 GHz microstrip resonator and a single flux quantum comparator clocked at 42.6 GHz achieves 49 dB peak SNR over a 20.8 MHz bandwidth. At 40.2 GHz clock rate, in-band noise over a 19.6 MHz bandwidth is -57 dBFS. The test chip with integrated acquisition memory contains 4065 Josephson junctions and dissipates 1.9 mW at T=4.2K.

Published in:

Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International  (Volume:1 )

Date of Conference:

7-7 Feb. 2002