SPICE simulation of a Load Cancellation Circuit

Description

The second stage of a voltage follower op amp, is a second operational amplifier that implements a load cancellation circuit. The output current of first operational amplifier is a function of its input voltage Vin and its load resistance RL. For example when Vin = 1V, AM1 (U1 output) and AMload (load current) = -1mA. The cancellation circuit provides all or part of this current. With compensation adjusted for 100%, the load current is furnished entirely by the compensation circuit. Thus the output of U1 essentially sees an “open circuit”. Rc controls the degree of load current compensation.

• Project Type: Free
• Complexity: Intermediate
• Components number: 11-20
• SPICE software: TINA
• Software version: 7+
• Full software version nedeed : Yes
• Screenshots simulation images: