Title :
A 0.8V, 7μA, rail-to-rail input/output, constant Gm operational amplifier in standard digital 0.18μm CMOS
Author :
Citakovic, Jelena ; Nielsen, Ivan Riis ; Nielsen, Jannik Hammel ; Asbeck, Per ; Andreani, Pietro
Author_Institution :
Orsted-DTU, Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
A two-stage amplifier, operational at 0.8V and drawing 7μA, has been integrated in a standard digital 0.18μm CMOS process. Rail-to-rail operations at the input are enabled by complementary transistor pairs with gm control. The efficient rail-to-rail output stage is biased in class AB. The measured DC gain of the amplifier is 75dB, and the unity-gain frequency is 870kHz with a 12pF, 100kΩload. Both input and output stage transistors are biased in weak inversion.
Keywords :
CMOS digital integrated circuits; integrated circuit design; operational amplifiers; 0.18 micron; 0.8 V; 100 kohm; 12 pF; 7 muA; 75 dB; 870 kHz; complementary transistor pairs; digital CMOS process; input stage transistors; operational amplifier; output stage transistors; rail-to-rail operations; two-stage amplifier; Circuits; Frequency; MOS devices; MOSFETs; Operational amplifiers; Rail to rail amplifiers; Rail to rail inputs; Rail to rail operation; Rail to rail outputs; Threshold voltage;
Conference_Titel :
NORCHIP Conference, 2005. 23rd
Print_ISBN :
1-4244-0064-3
DOI :
10.1109/NORCHP.2005.1596987
