Title
A Continuous-Time BJT-Based Temperature-to-Digital Converter
Author
Saad, Mohamed (TU Delft Electrical Engineering, Mathematics and Computer Science; TU Delft Microelectronics)
Contributor
Makinwa, K.A.A. (mentor)
Degree granting institution
Delft University of Technology
Programme
Electrical Engineering | Microelectronics
Date
2020-11-24
Abstract
This thesis presents a BJT-based CMOS temperature-to-digital converter (TDC). With a continuous-time readout, the TDC avoids the kT/C noise limit incurred by previous discrete-time (switched-capacitor) TDCs. An energy-efficient BJT front-end generates single PTAT and CTAT currents for being digitized by a delta-sigma modulator through a linear charge-balancing operation. Simulated in a standard 0.18 um CMOS process, the TDC achieves a (3*sigma) inaccuracy of 0.13'C from -40'C to 125'C after one-point trimming. Moreover, the TDC achieves 4 mK resolution in a 202 millisecond conversion time, while consuming 4.9 uW. This corresponds to a resolution FoM of 15.7 pJ.K2.
Subject
BJT-based TDC
delta-sigma modulator
continuous time
readout
To reference this document use:
http://resolver.tudelft.nl/uuid:5f413e1a-91c0-4fb1-8e59-1dfdb1dfe1da
Embargo date
2022-11-24
Part of collection
Student theses
Document type
master thesis
Rights
© 2020 Mohamed Saad