voltage follower circuit composed of the μA709

Published:2011/6/27 20:49:00 Author:Rebekka | Keyword: voltage follower | From:SeekIC

Figure (a) shows the circuit of the voltage follower. It is a special case of the inverting amplifier circuit. The basic relationship of the circuit is: Vi + Vis = Vo Vo =-AVis formula: A - open loop voltage gain operation; Vis - pure op amp input voltage; In the circuit, when the voltage amplitude of the input signal increased to the op amp's positive supply voltage, the deadlock may occur, ie the output signal will not work properly which is due to the internal positive feedback op amp has a parasitic oscillation. To prevent this phenomenon, you can use (b).



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