A 0.7mW 13b temperature-stable MASH ΔΣ TDC with delay-line assisted calibration

Author

Cao, Ying ; Leroux, Paul ; De Cock, Wouter ; Steyaert, Michiel

Author_Institution

Dept. ESAT-MICAS, K.U. Leuven, Heverlee, Belgium

fYear

2011

fDate

14-16 Nov. 2011

Firstpage

361

Lastpage

364

Abstract

A 1-1-1 MASH AX Time-to-Digital Converter (TDC) with 6ps time resolution is implemented in 0.13μm CMOS. It achieves an ENOB of 13b and a wide input range of 100ns. The TDC exhibits stability within a temperature range of -20 to 120°C, which credits to the use of an on-chip bandgap reference and passive RC oscillators. A novel delay-line assisted online calibration technique is introduced to mitigate the skew error caused by the large comparator delay. The chip consumes only 0.7mW from 1.2V supply, and occupies 0.08mm² area (core).

Keywords

CMOS digital integrated circuits; RC circuits; calibration; comparators (circuits); delay lines; delta-sigma modulation; oscillators; time-digital conversion; 1-1-1 MASH ΔΣ time-to-digital converter; CMOS process; comparator delay; delay-line assisted online calibration technique; on-chip bandgap reference; passive RC oscillator; power 0.7 mW; size 0.13 mum; skew error mitigation; temperature -20 degC to 120 degC; temperature-stable MASH ΔΣ TDC; time 100 ns; time 6 ps; time resolution; voltage 1.2 V; CMOS integrated circuits; Calibration; Delay; Multi-stage noise shaping; Oscillators; Temperature measurement; Voltage measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid State Circuits Conference (A-SSCC), 2011 IEEE Asian

Conference_Location

Jeju

Print_ISBN

978-1-4577-1784-0

Type

conf

DOI

10.1109/ASSCC.2011.6123589

Filename

6123589