TY - GEN
T1 - Stability Improvements in a Rail-to-Rail Input/Output, Constant Gm Operational Amplifier, at 0.4 V Operation, Using the Low-Voltage DTMOS Technique
AU - Correia, Joana
AU - Mancelos, Nuno
AU - Goes, João
PY - 2014
Y1 - 2014
N2 - The use of the dynamic threshold MOS (DTMOS) technique is evaluated in a two-stage rail-to-rail Input/Output, constant G m amplifier. The proper choice of specific transistors in which the technique should be used is presented, as well as the resulting improvements, mainly regarding stability of the circuit at low voltage operation. The DTMOS technique is used in the NMOS transistors of the folded-cascode input stage, allowing the circuit to be stable at V DD = 0.4 V, with equivalent gain and gain-and-bandwidth product (GBW) values achieved with the same V DD value, for the initial circuit operating at 0.8 V. The implemented changes allow the circuit to be stable at low voltage operations without requiring any increase in the cascoded-Miller compensation capacitors, saving circuit area and, consequently, cost.
AB - The use of the dynamic threshold MOS (DTMOS) technique is evaluated in a two-stage rail-to-rail Input/Output, constant G m amplifier. The proper choice of specific transistors in which the technique should be used is presented, as well as the resulting improvements, mainly regarding stability of the circuit at low voltage operation. The DTMOS technique is used in the NMOS transistors of the folded-cascode input stage, allowing the circuit to be stable at V DD = 0.4 V, with equivalent gain and gain-and-bandwidth product (GBW) values achieved with the same V DD value, for the initial circuit operating at 0.8 V. The implemented changes allow the circuit to be stable at low voltage operations without requiring any increase in the cascoded-Miller compensation capacitors, saving circuit area and, consequently, cost.
KW - Low supply voltage OPAMP
KW - Low-voltage DTMOS technique
KW - Low-voltage OPAMP stability issues
UR - http://www.scopus.com/inward/record.url?scp=84940218012&partnerID=8YFLogxK
U2 - 10.1007/978-3-642-54734-8_65
DO - 10.1007/978-3-642-54734-8_65
M3 - Conference contribution
SN - 9783642547331
T3 - IFIP Advances in Information and Communication Technology
SP - 585
EP - 591
BT - Technological Innovation for Collective Awareness Systems - 5th IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems, DoCEIS2014, Proceedings
PB - Springer New York LLC
T2 - 5th IFIP WG 5.5/SOCOLNET Doctoral Conference on Computing, Electrical and Industrial Systems (DoCEIS)
Y2 - 7 April 2014 through 9 April 2014
ER -