Bipolar operational amplifier powered by a 1 V battery

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 mu A. Current boosting is employed to achieve a maximal output swing very close to the power supply rails for low impedanc...

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Bibliographic Details
Published in[1991 Proceedings] 6th Mediterranean Electrotechnical Conference pp. 274 - 277 vol.1
Main Authors Mavretic, A., Jenko, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1991
Subjects
Batteries
Circuits
Energy consumption
Impedance
Operational amplifiers
Power amplifiers
Power supplies
Temperature
Transconductance
Voltage
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Summary: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 mu A. 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.< >
ISBN:0879426551
9780879426552
DOI:10.1109/MELCON.1991.161830