Low-power Temperature-insensitive Timer
The rapid growth of the internet of things leads to high demand for the continuous monitoring of environmental and biomedical signals. To satisfy the requirement for duty-cycled wireless IoT devices, the timer needs to be precise and low-power. Conventional crystal-based timer is bulky. RC-based timer is a good alternative that can be integrated on-chip . Capacitors are relatively insensitive to temperature change, so it is critical to control the resistors to achieve temperature-stable timer.
In this project, the student will: 1. Study prior art 2. Characterizing on-chip resistors 3. Exploring and developing novel on-chip timer
- 20% Literature review
- 20% Theory
- 30% Device characterization
- 30% Design and simulation
Prof. Taekwang Jang <email@example.com>
 T. Jang, M. Choi, S. Jeong, S. Bang, D. Sylvester, and D. Blaauw, “5.8 A 4.7nW 13.8ppm/°C self-biased wakeup timer using a switched-resistor scheme,” in 2016 IEEE International Solid-State Circuits Conference (ISSCC), Jan. 2016, pp. 102–103. doi: 10.1109/ISSCC.2016.7417927.
 G. Cristiano, J. Liao, A. Novello, G. Atzeni, and T. Jang, “A 8.7ppm/°C, 694nW, One-Point Calibrated RC Oscillator using a Nonlinearity-Aware Dual Phase-Locked Loop and DSM-Controlled Frequency-Locked Loops,” in 2020 IEEE Symposium on VLSI Circuits, Jun. 2020, pp. 1–2. doi: 10.1109/VLSICircuits18222.2020.9162838.
 M. Ding, M. Song, E. Tiurin, S. Traferro, Y.-H. Liu, and C. Bachmann, “A 0.9pJ/cycle 8ppm/oC DFLL-based Wakeup timer Enabled by a Time-Domain Trimming and An Embedded Temperature Sensing,” p. 2.