This paper presents a CMOS realization of a time-to-digital converter (TDC) for nuclear physics experiments. An innovative and robust architecture, already used in a previous TDC version with 1 ns of bin size, has been adopted and improved with the aim to achieve a 500-ps bin size. The TDC has eight input channels plus a common channel. It can store up to 32 events per channel with a double-hit resolution of 8 ns. It can realize common-start and common-stop operations. It has 4.2 ms of input range with a 125-MHz system clock, The chip uses an asynchronous interpolator system based on a delay-locked Line to increase the coarse resolution. It has been fabricated in a double-metal single poly n-well, 1-mu m CMOS process with an area of about 77 mm(2). Measurements show that the TDC has better performance compared to similar devices, especially the time resolution below 250 ps.

A 250-ps time-resolution CMOS multihit time-to-digital converter for nuclear physics experiments

RONCELLA, ROBERTO;SALETTI, ROBERTO;TERRENI, PIERANGELO
1999-01-01

Abstract

This paper presents a CMOS realization of a time-to-digital converter (TDC) for nuclear physics experiments. An innovative and robust architecture, already used in a previous TDC version with 1 ns of bin size, has been adopted and improved with the aim to achieve a 500-ps bin size. The TDC has eight input channels plus a common channel. It can store up to 32 events per channel with a double-hit resolution of 8 ns. It can realize common-start and common-stop operations. It has 4.2 ms of input range with a 125-MHz system clock, The chip uses an asynchronous interpolator system based on a delay-locked Line to increase the coarse resolution. It has been fabricated in a double-metal single poly n-well, 1-mu m CMOS process with an area of about 77 mm(2). Measurements show that the TDC has better performance compared to similar devices, especially the time resolution below 250 ps.
1999
Bigongiari, F.; Roncella, Roberto; Saletti, Roberto; Terreni, Pierangelo
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11568/189921
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