A Novel CMOS Current Reference with Low Temperature and Supply Dependence

Author

Liu, Yuan ; Liu, Guo-qing ; He, Bo ; Fan, Long ; Ning, Ning ; Yu, Qi ; Yang, Mo-hua

Author_Institution

Sch. of Microelectron. & Solid-State Electron., Univ. of Sci. & Technol. of China, Chengdu

Volume

4

fYear

2006

fDate

25-28 June 2006

Firstpage

2201

Lastpage

2204

Abstract

A new CMOS current reference solution is presented, by creating a new negative temperature coefficient (TC) current resulted from negative-TC voltage which is generated in the bandgap circuit whose zero-TC (ZTC) point is specially selected, and proposing low line regulation mechanism which is realized by compensating variations of source-to-gate voltage and threshold voltage versus supply voltages. Based on the SMIC CMOS 0.35 mum model, simulation results in Cadence Hspice indicate that the current reference has a TC of 6.9 ppm/degC over the temperature range from -40 to 85 degC and a line regulation of 10.6 ppm/V for a supply voltage of 3.0 to 3.6 V, which are much lower than the specifications in recent designs. The new solution has been implemented into a 10 bit 100 MSample/s ADC design and is promising to be applied in the research and development of analog/mixed signal systems

Keywords

CMOS integrated circuits; reference circuits; 0.35 micron; CMOS current reference; bandgap circuit; line regulation mechanism; negative temperature coefficient; CMOS technology; Helium; Microelectronics; Photonic band gap; Resistors; Semiconductor device modeling; Solid state circuits; Temperature dependence; Temperature distribution; Threshold voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, Circuits and Systems Proceedings, 2006 International Conference on

Conference_Location

Guilin

Print_ISBN

0-7803-9584-0

Electronic_ISBN

0-7803-9585-9

Type

conf

DOI

10.1109/ICCCAS.2006.285114

Filename

4064361