Superconducting high-resolution A/D converter based on phase modulation and multichannel timing arbitration

Author

Rylov, S.V. ; Robertazzi, R.P.

Author_Institution

HYPRES Inc., Elmsford, NY, USA

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2260

Lastpage

2263

Abstract

We have developed a flux-quantizing A/D converter (ADC) based on RSFQ elements, employing a novel front end capable of generating high-linearity multibit differential code within a wide dynamic range (up to 16 bits). The front end operates as a phase modulator/demodulator and uses fractional-flux-quantum least significant bit (LSB). It runs at multi-GHz speed, enabling ADCs with large oversampling ratio and effective resolution in excess of 20 bits (after decimation filtering). We have designed, fabricated and tested several versions of a complete ADC using this new architecture and demonstrated its operation with dynamic range of 14 bits. We have also confirmed continuous phase modulation of the flux quantizer with a carrier frequency of 10 GHz.<>

Keywords

Josephson effect; analogue-digital conversion; continuous phase modulation; superconducting integrated circuits; timing; 10 GHz; 14 to 20 bit; A/D converter; RSFQ elements; flux-quantizing ADC; high-resolution ADC; least significant bit; multibit differential code; multichannel timing arbitration; oversampling; phase modulation; superconducting ADC; wide dynamic range; Clocks; Filters; Frequency; Hardware; Magnetic flux; Phase modulation; Pulse amplifiers; Pulse generation; Timing; Voltage;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403035

Filename

403035