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

Author

Bulzacchelli, J.F. ; Hae-Seung Lee ; Misewich, J.A. ; Ketchen, M.B.

Author_Institution

MIT, Cambridge, MA, USA

Volume

1

fYear

2002

fDate

7-7 Feb. 2002

Firstpage

188

Abstract

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.

Keywords

aluminium compounds; band-pass filters; current comparators; delta-sigma modulation; microwave integrated circuits; niobium; superconducting device noise; superconducting integrated circuits; superconductor-insulator-superconductor devices; 19.6 MHz; 2.23 GHz; 2.23 GHz center frequency; 20.8 MHz; 40.2 GHz clock rate; 42.6 GHz; 42.6 GHz sampling rate; GHz range; Josephson junctions; Nb-AlO/sub x/-Nb; Nb/AlO/sub x//Nb technology; SNRs; bandwidth 19.6 MHz; bandwidth 20.8 MHz; dissipation 1.9 mW; microstrip resonator; single flux quantum comparator; superconducting bandpass /spl Delta//spl Sigma/ modulator; test chip; Clocks; Counting circuits; Delta modulation; Frequency; Josephson junctions; Pulse amplifiers; Pulse generation; Pulse modulation; Sampling methods; Shift registers;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-7335-9

Type

conf

DOI

10.1109/ISSCC.2002.992999

Filename

992999