Abstract
A fully differential master-slave track-and-hold amplifier is designed and fabricated in a 210-GHz- <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">f</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">T</sub> InP DHBT process. Input bandwidth of 15 GHz, total harmonic distortion lower than -39 dB and a third harmonic rejection greater than 45 dB are measured for 1 GSample/s and 4 dBm single-ended input signal. Time domain measurements demonstrate the performances of dual track-and-hold amplifier for Nyquist, over-sampling and sub-sampling conditions. Design tradeoff for master and slave blocks are presented. Experimental results obtained for different feed-through capacitors ( <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">FF</sub> ) show the effects of <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">C</i> <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">FF</sub> on bandwidth and isolation.
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