Abstract

The authors describe a Schottky-diode sample-and-hold (S/H) circuit fabricated in an AlGaAs-GaAs heterojunction bipolar transistor (HBT) process. The transistors exhibit an f/sub T/ of over 50 GHz. The S/H circuit operates at up to 2G samples/s, with distortion below-40 dBc up to and beyond the Nyquist input frequency of 1 GHz. >

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