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Comparative Analysis of Low Power CMOS Class -A Voltage Followers with Current Mirror as a Load

Gaurang P. Banker, Amisha Naik

Open publisher page 5 citations

Abstract

This paper describes four different class-A voltage followers like basic source follower, flipped voltage follower and super source follower. Each follower has several advantages and several limitations. Main aim is to characterize these voltage followers in terms of output impedance, power dissipation, ac gain and bandwidth. Both pre-layout and post layout simulation are done in 0.5µm AMI technology using mentor graphics. All Voltage Follower characterized using ideal current source and then using current mirror as a current source. Their layouts are being prepared in 0.5µm process technology. The results are used to compare the performance of above followers. For the super source follower using current Mirror as current source the output impedance is very low just 40Ω and also gain is near unity and bandwidth 100MHz is higher compare to other topologies.

About this research paper

What this paper is about

This paper describes four different class-A voltage followers like basic source follower, flipped voltage follower and super source follower. Each follower has several advantages and several limitations. Main aim is to characterize these voltage followers in terms of output impedance, power dissipation, ac gain and bandwidth. Both pre-layout and post layout simulation are done in 0.5µm AMI technology using mentor graphics. All Voltage Follower characterized using ideal current source and then using current mirror as a current source. Their layouts are being prepared in 0.5µm process technology. The results are used to compare the performance of above followers. For the super source follower using current Mirror as current source the output impedance is very low just 40Ω and also gain is near unity and bandwidth 100MHz is higher compare to other topologies.

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Available abstract

This paper describes four different class-A voltage followers like basic source follower, flipped voltage follower and super source follower. Each follower has several advantages and several limitations. Main aim is to characterize these voltage followers in terms of output impedance, power dissipation, ac gain and bandwidth. Both pre-layout and post layout simulation are done in 0.5µm AMI technology using mentor graphics. All Voltage Follower characterized using ideal current source and then using current mirror as a current source. Their layouts are being prepared in 0.5µm process technology. The results are used to compare the performance of above followers. For the super source follower using current Mirror as current source the output impedance is very low just 40Ω and also gain is near unity and bandwidth 100MHz is higher compare to other topologies.

Key concepts: Current mirror, Voltage source, Current source, Mesh analysis, Output impedance, Electronic engineering, Electrical engineering, Voltage

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Comparative Analysis of Low Power CMOS Class -A Voltage Followers with Current Mirror as a Load — Research Paper | ScholarLens