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A 10 bit cryogenic current steering D/A converter (DAC), operating from room temperature to as low as 4.2K temperature, is presented here. The converter is primarily designed for a Silicon (Si) quantum computer controller circuit for initializing quantum bits (qubits). A new analog calibration method with an on chip reference current generator is applied to all the bits of the converter to overcome...
A cryogenic CMOS D/A converter, core part of a Silicon quantum computer controller, produces voltage signals to generate electric fields for Silicon quantum bits initialization. In low temperature, the converter has to overcome several constraints before it is ready to work. These include CMOS operating region choice, anomalies of CMOS behavior, component mismatch degradation, technology choice and...
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