Title :
Bipolar operational amplifier powered by a 1 V battery
Author :
Mavretic, A. ; Jenko, M.
Author_Institution :
Dept. of Electr., Comput. & Syst. Eng., Boston Univ., MA, USA
Abstract :
The design of a micropower op amp suitable for biomedical applications is presented. A 1-V battery is used for powering the circuit. The quiescent power consumption is under 300 μA. Current boosting is employed to achieve a maximal output swing very close to the power supply rails for low impedance loads. The input stage consists of p-n-p transistors in differential configuration. The gain stage is a common emitter amplifier with n-p-n transistors. The output stage is a class AB amplifier with both n-p-n and p-n-p transistors driven by unique current amplifiers
Keywords :
bipolar integrated circuits; differential amplifiers; linear integrated circuits; operational amplifiers; 1 V; biomedical applications; class AB amplifier; common emitter amplifier; current amplifiers; current boosting; differential configuration; gain stage; input stage; micropower op amp; monolithic IC; n-p-n transistors; operational amplifier; output stage; p-n-p transistors; quiescent power consumption; Batteries; Circuits; Energy consumption; Impedance; Operational amplifiers; Power amplifiers; Power supplies; Temperature; Transconductance; Voltage;
Conference_Titel :
Electrotechnical Conference, 1991. Proceedings., 6th Mediterranean
Conference_Location :
LJubljana
Print_ISBN :
0-87942-655-1
DOI :
10.1109/MELCON.1991.161830
