Title :
Application of resonant-tunneling quaternary quantizer to ultrahigh-speed A/D converter
Author :
Waho, Takao ; Yamamoto, Masafumi
Author_Institution :
NTT Syst. Electron. Labs., Kanagawa, Japan
Abstract :
An analog-to-quaternary quantizer using resonant-tunneling (RT) devices is applied to an ultrahigh-speed analog-to-digital (A/D) converter. First, transient analysis results for the quaternary quantizer, which consists of six RT diodes and one HEMT, are presented. A 4-bit A/D converter employing this quantizer with multiple-valued logic encoding circuits is then described. The number of transistors is one-fifth of that required for conventional A/D converters. SPICE simulation reveals that the present A/D converter can be operated at sampling rates as high as 4 GS/s
Keywords :
SPICE; analogue-digital conversion; encoding; logic CAD; multivalued logic; quantisation (signal); resonant tunnelling devices; transient analysis; HEMT; RT diodes; SPICE simulation; analog-to-quaternary quantizer; multiple-valued logic encoding circuits; resonant-tunneling devices; resonant-tunneling quaternary quantizer; transient analysis; ultrahigh-speed A/D converter; Analog-digital conversion; Circuit simulation; Diodes; Encoding; HEMTs; Logic circuits; Logic devices; Resonant tunneling devices; SPICE; Transient analysis;
Conference_Titel :
Multiple-Valued Logic, 1997. Proceedings., 1997 27th International Symposium on
Conference_Location :
Antigonish, NS
Print_ISBN :
0-8186-7910-7
DOI :
10.1109/ISMVL.1997.601371
