In this paper, the design of a Time-to-Digital Converter (TDC) for measuring the Time of Flight (ToF) of a radio pulse is described. The novel idea is based on the adoption of a charge-pump time-to-voltage transducer followed by a Sample-and-Hold amplifier (SHA) and by a second-order discrete-time incremental delta-sigma converter to perform a single-shot conversion. The TDC architecture is capable of achieving a range of 220 ns, a time resolution of about 200 ps (with a 10-bit incremental delta-sigma converter) and robustness with respect to temperature variations. The design has been successfully verified through simulations both at system and transistor levels using a 0.25um complimentary metal-oxide-semiconductor (CMOS) technology with a -2.5 to +4V power supply.
A Novel Sample-and-Hold-Based Time-to-Digital Converter Architecture
NAPOLITANO, PASQUALE;ALIMENTI, Federico;CARBONE, Paolo
2010
Abstract
In this paper, the design of a Time-to-Digital Converter (TDC) for measuring the Time of Flight (ToF) of a radio pulse is described. The novel idea is based on the adoption of a charge-pump time-to-voltage transducer followed by a Sample-and-Hold amplifier (SHA) and by a second-order discrete-time incremental delta-sigma converter to perform a single-shot conversion. The TDC architecture is capable of achieving a range of 220 ns, a time resolution of about 200 ps (with a 10-bit incremental delta-sigma converter) and robustness with respect to temperature variations. The design has been successfully verified through simulations both at system and transistor levels using a 0.25um complimentary metal-oxide-semiconductor (CMOS) technology with a -2.5 to +4V power supply.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
