Title :
1.5V CMOS current reference with extended temperature operating range
Author :
Badillo, Dean A.
Author_Institution :
Semicond. Products Sector, Motorola Inc., Tempe, AZ, USA
fDate :
6/24/1905 12:00:00 AM
Abstract :
Traditional bandgap based current references have restricted temperature operating range due to the limited input common mode range of the feedback amplifier. This paper introduces a modified bandgap current reference that overcomes this limitation by placing a natural device (Vth ∼ 0V) level shift stage between the amplifier and the bandgap. The circuit has been fabricated in a 0.25-μm CMOS process. It generates a reference current of 5μA with a temperature variation of 7% over an extended temperature range of -40°C to 150°C. The bandgap occupies approximately 170×80μm2 and draws 56μA from a 1.5V supply.
Keywords :
CMOS analogue integrated circuits; reference circuits; -40 to 150 degC; 0.25 micron; 1.5 V; 5 muA; 56 muA; CMOS; bandgap current reference; extended temperature operating range; input common mode range; level shift stage; temperature variation; CMOS process; Circuits; Dielectric substrates; MOS devices; Operational amplifiers; Photonic band gap; Resistors; Silicon; Temperature distribution; Threshold voltage;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010194
