DocumentCode :
3388410
Title :
System architecture and key components for an 8 bit/1 GHz GaAs MESFET ADC
Author :
Sauerer, J. ; Hagelauer, R. ; Oehler, F. ; Rohmer, G. ; Schlag, U. ; Seitzer, D. ; Grave, T. ; Kellner, W.
Author_Institution :
FhG-IIS, Erlangen, Germany
fYear :
1997
fDate :
4-7 Oct. 1997
Firstpage :
105
Lastpage :
108
Abstract :
Different ADC (analog-to-digital converter) algorithms were investigated to find an architecture suited for high speed/high resolution converters based on MESFET technologies. A two-stage cascaded converter was selected for achieving 8-b resolution at a 1-GHz sampling rate. Key components for this kind of converter were developed, fabricated, and characterized. Measurements of the track and hold circuitry showed a droop of 3 mV/ mu s, a slew rate of 3 kV/ mu s, and a setting time of 220 ps. Its accuracy corresponds to 9.5 b at a 1-GHz clock rate with a 100-MHz input frequency. The 4-b quantizer operates up to 1.5 GSps. At 800 MSps, 3.8 effective bits were achieved with input frequencies up to 200 MHz. The digital-to-analog converter necessary to reconstruct the analog signal after coarse quantization was merged into this quantizer to minimize the propagation delay of this path, which determines the maximum sampling rate.<>
Keywords :
III-V semiconductors; analogue-digital conversion; cascade networks; field effect integrated circuits; gallium arsenide; 1 GHz; 220 ps; ADC; MESFET technologies; clock rate; coarse quantization; droop; high speed/high resolution converters; propagation delay; quantizer; sampling rate; setting time; slew rate; track and hold circuitry; two-stage cascaded converter; Analog-digital conversion; Circuits; Clocks; Digital-analog conversion; Frequency; Gallium arsenide; MESFETs; Quantization; Sampling methods; Time measurement;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Gallium Arsenide Integrated Circuit (GaAs IC) Symposium, 1992. Technical Digest 1992., 14th Annual IEEE
Conference_Location :
Miami Beach, FL, USA
Print_ISBN :
0-7803-0773-9
Type :
conf
DOI :
10.1109/GAAS.1992.247212
Filename :
247212
Link To Document :
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