Precision analog circuits are needed in an IC to provide an absolute reference for clocks, voltage, etc. to be able to accurately process information from the external world. Recently, the interest in precision circuits has increased because of IoT where various sensing applications are performed in a widespread environment. The ultra-low power consumption is a key requirement for precision circuits. We developed a 1.5nW crystal oscillator circuit for providing real time clock reference for an IC. We also developed lowest power temperature sensor, bandgap reference, and most precise on-chip clock source.
- D. Akella Kamakshi, A Shrivastava, and BH Calhoun, “A 0.2 V, 23 nW CMOS Temperature Sensor for Ultra-Low-Power IoT Applications,”Journal of Low Power Electronics and Applications, (JLPEA), June 2016. pdf
- D Akella Kamakshi, A Shrivastava, and BH Calhoun, “A 36 nW 7 ppm/°C on-Chip Clock Source Platform for Near-Human-Body Temperature Applications“, Journal of Low Power Electronics and Applications, (JLPEA), May 2016. pdf
- A. Shrivastava, D. Akella, and B. H. Calhoun, “A 1.5nW, 32.768kHz XTAL Oscillator Operational from 0.3V Supply”, IEEE Journal of Solid-State Circuits, (JSSC), March 2016. pdf
- “A 32nW Bandgap Reference Voltage Operational from 0.5V Supply for Ultra-low Power Systems“, EEE International Solid-State Circuits Conference (ISSCC), 2015. pdf
- A. Shrivastava, and B. H. Calhoun, “A 150nW, 5ppm/oC, 100kHz On-Chip Clock Source for Ultra Low Power SoCs“, IEEE Custom Integrated Circuits Conference (CICC), September 2012. pdf