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An 800 MSps Track and hold using a 0.3 µm AlGaAs-HEMT-technology



Institute of Electrical and Electronics Engineers -IEEE-; IEEE Microwave Theory and Techniques Society:
16th GaAs IC Symposium 1994. Technical Digest
Piscataway, NJ: IEEE, 1994
ISBN: 0-7803-1975-3
GaAs IC Symposium <16, 1994, Philadelphia>
Conference Paper
Fraunhofer IIS A ( IIS) ()
Abtasthalteglied; ADC; ADU; Analog-Digital-Umsetzer; analog-to-digital-converter; Gallium Arsenid; gallium arsenide; HEMT; sample and hold; track and hold

A feedforward T/H was developed as part of a 100 MSps / 10 bit successive approximation ADC using a 0.3 µm AlGaAs-HEMT process. This T/H is able to operate up to a clock frequency of 3 GHz and reaches a THD >= 60 dB up to the Nyquist frequency of the ADC at the nominal clock frequency of 800 MHz. This was realized using a special circuit structure with a signal path and a reference path and a new diode bridge switch with an additional auxiliary bridge.