A High Precision Temperature Insensitive Current and Voltage Reference Generator

A high precision temperature insensitive current and voltage reference generator is presented. It is specifically developed for temperature compensated oscillator. The circuit, designed using MXIC 0.5um CMOS technology, has an operating voltage that ranges from 2.6V to 5V and generates a voltage of 1.21V and a current of 6.38 ӴA. It exhibits a variation of ±0.3nA for the current reference and a stable output for voltage reference as the temperature is varied from 0°C to 70°C. The power supply rejection ratio obtained without any filtering capacitor at 100Hz and 10MHz is -30dB and -12dB respectively.

• Kimberly Jane S. Uy
• Patricia Angela Reyes-Abu
• Wen Yaw Chung

• Current reference
• voltage reference
• threshold voltage
• temperature compensation
• mobility.

[1] G. De Vita, and G. Iannaccone, "An Ultra Low Power, Temperature
Compensated Voltage Reference Generator", IEEE 2005 Custom
Integrated Circuits Conference, pp. 751-754, 2005.
[2] F. S. Shoucair, "Design Considerations in High Temperature Analog
CMOS Integrated Circuits", IEEE Trans. On Components, Hybrids,
and Manufacturing Technology, , vol. CHMT-9, pp. 242-251, Sept.
1986.
[3] G. Giustolisi, G. Palumbo, M. Criscione, and F. Cutri, "A Low Voltage
Low Power Voltage Reference Based on Subthreshold MOSFETs",
IEEE J. Solid States Circuits, vol. 38, pp.151-154, Jan 2003.
[4] K. N. Leung, and P. K. T. Mok, "A CMOS Voltage Reference Based on
Weighted ΔVGS for CMOS Low-Dropout Linear Regulators", IEEE J.
Solid-State Circuits, vol. 38, pp. 146-149, Jan. 2003.
[5] P. E. Allen, and D. R. Holberg, "CMOS Analog Circuit Design,
Second Edition", New York: Oxford University Press Inc., 2002.
[6] A. Hastings, "The Art of Analog Layout", New Jersey: Prentice Hall,
2001.