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Chapter: Linear Integrated Circuits : Basics of Operational Amplifiers

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Current sources as Active loads

The current source can be used as an active load in both analog and digital IC‘s.

Current sources as Active loads

 

The current source can be used as an active load in both analog and digital IC‘s. The active load realized using current source in place of the passive load (i.e. a resistor) in the collector arm of differential amplifier makes it possible to achieve high voltage gain without requiring large power supply voltage. The active load so achieved is basically R0 of a PNP transistor.

 

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