ECE Team wins runner-up best student paper award at the 2014 IEEE ISCAS


Dr. Laleh Najafizadeh's group won the runner-up best student paper award at the 2014 IEEE ISCAS (the flagship conference of the IEEE Circuits and Systems Society), which was held in Melbourne Australia in June 2014.

The first author in the paper is Yi Huang, an ECE student pursuing his Ph.D. at the Integrated Circuits and NeuroImaging Lab of ECE under the supervision of Dr. Najafizadeh, while working concurrently at Intersil Corporation. Other authors on this paper are Li Zhu (ECE Ph.D. student), Chun Cheung (Intersil Corporation) and Laleh Najafizadeh (ECE).

The best student paper competition had two phases. The first phase selected 10 finalists based on the review scores, and the second phase selected the winners based on the paper presentation at the conference. Yi traveled to Australia and presented the paper. The paper title and abstract are given below.

"A Low Temperature Coefficient Voltage Reference Utilizing BiCMOS Compensation Technique"

The paper presents a novel low temperature coefficient BiCMOS reference circuit for applications requiring a high degree of precision. A BiCMOS compensation approach by combining the temperature properties of HBTs and CMOS transistors has been proposed to target the direct cancellation of the non-linear temperature term in the base-emitter expression. The Complementary to Absolute Temperature (CTAT) current is generated by a SiGe HBT, while the Proportional to Absolute Temperature (PTAT) current is generated by MOSFETs operating in the subthreshold region. In addition, by adding a nonlinear component, a higher level of temperature compensation is achieved. Designed in IBM's Silicon Germanium (SiGe) BiCMOS technology, simulation results show that with a power supply of 1.2 V, the circuit generates an output voltage of 0.981 V with a temperature coefficient of 0.6 ppm/°C over the temperature range of (-25:125) °C.

The link to the full paper is at: