In this work, the design of a Time-to-Digital Converter (TDC) for measuring the time-of-flight (ToF) of a radio pulse is described. It consists on two blocks: a time-to-voltage transducer, whose scheme is that of a charge pump, designed using a 0.25um CMOS process, and an incremental first order sigma-delta (sigma-delta) converter. The two blocks are connected together by means of a Sample and Hold Amplifier (SHA). The specifications are: time resolution smaller than 27ps and range up to 220ns. The total relative percentage error is less than 3%, this adopting a sigma-delta converter with more than 10 bits.
A Novel Charge-Pump Based Time-to-Digital Converter
NAPOLITANO, PASQUALE;ALIMENTI, Federico;CARBONE, Paolo
2009
Abstract
In this work, the design of a Time-to-Digital Converter (TDC) for measuring the time-of-flight (ToF) of a radio pulse is described. It consists on two blocks: a time-to-voltage transducer, whose scheme is that of a charge pump, designed using a 0.25um CMOS process, and an incremental first order sigma-delta (sigma-delta) converter. The two blocks are connected together by means of a Sample and Hold Amplifier (SHA). The specifications are: time resolution smaller than 27ps and range up to 220ns. The total relative percentage error is less than 3%, this adopting a sigma-delta converter with more than 10 bits.File in questo prodotto:
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