Title :
An improved current-mode CMOS voltage reference
Author :
Harrison, W. Todd ; Connelly, J.Alvin ; Stair, Richard
Author_Institution :
Intersil Corp., Res. Triangle Park, NC, USA
Abstract :
An improved current-mode CMOS voltage reference derives its temperature independent characteristic from two temperature dependent currents which are summed together into a resistor to generate the reference voltage. A CMOS proportional to absolute temperature (PTAT) current generator using substrate bipolar transistors creates the current that increases with temperature. A CMOS threshold voltage extractor circuit creates the conversely proportional to absolute temperature (CTAT) current that decreases with increasing temperature. The reference operates over a temperature range of 0 to 100°C with a power supply voltage between 3.3 and 7 V. Simulations show that over these conditions, the output voltage varies by less than 1% over the specified temperature range while using less than 75 μA of current
Keywords :
CMOS analogue integrated circuits; current-mode circuits; reference circuits; 0 to 100 degC; 3.3 to 7 V; conversely proportional to absolute temperature current; current-mode CMOS voltage reference; output voltage; power supply voltage; proportional to absolute temperature current generator; reference voltage; substrate bipolar transistors; temperature dependent currents; temperature independent characteristic; threshold voltage extractor circuit; Bipolar transistors; CMOS technology; Circuits; MOSFETs; Photonic band gap; Power supplies; Resistors; Temperature dependence; Temperature distribution; Voltage;
Conference_Titel :
Mixed-Signal Design, 2001. SSMSD. 2001 Southwest Symposium on
Conference_Location :
Austin, TX
Print_ISBN :
0-7803-6742-1
DOI :
10.1109/SSMSD.2001.914931
