A compact sub-1V class AB operational amplifier for low-voltage switched-capacitor circuits
2017
A compact sub-1V class-AB operational amplifier to be used as a building block for low-voltage switched-capacitor architectures is presented. The proposed amplifier works properly with supply voltages in the range 0.9 V–1.4 V, providing a gain-bandwidth product of 8 MHz, and a maximum output short-circuit current of 1 mA with 120 μA quiescent supply current. The performances of the operational amplifier are demonstrated by means of electrical simulations performed on a prototype designed with the UMC 0.18 μm / 3.3 V process. The total area of the cell, estimated from a preliminary layout, is 75×105 μm 2 .
Keywords:
- Op amp integrator
- Log amplifier
- Electronic engineering
- Transimpedance amplifier
- Direct-coupled amplifier
- Current-feedback operational amplifier
- Computer science
- Operational transconductance amplifier
- Operational amplifier
- Control engineering
- Input offset voltage
- Electrical engineering
- Operational amplifier applications
- Cascade amplifier
- Correction
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- Cite
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