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We present a time domain multiplexer for high impedance bolometer arrays. It is based on the use of quantum-point-contact high-electron-mobility-transistors (QPC-HEMTs) as low temperature switches and a cold FET amplifier with programmable auto-zero-circuit. We employ the high bolometer resistance (about 10 MΩ) in parallel with a capacitance as antialiasing filter. A new generation of QPC-HEMT reaches...
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