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All I am trying to do is to implement a gain amplifier with Gain of 2 for an input signal of 0-1V at 50MHz with out any overshoot, undershoot and ringing noise at the edges. This will be duplicated for 4 channels.
thanks
Challenging. Pcb layout will be critical.Gain of 2 for an input signal of 0-1V at 50MHz with out any overshoot, undershoot and ringing noise at the edges.
What is the purpose of the chain R4...R6 ?
Why two inverting opamps for a gain of 2 ? Why not using one single non-inverting circuit?
The offset trim doesn't have any effect on the output offset which is strange to me. Does anyone have a working schematic of a opamp with an adjustable gain of 2 along with adjustable offset. Basically something that replicates the circuit that I have, but tested and working?
thanks.
Try applying the offset to the + input as described here:
The method of adding a voltage to the non-inverting input can also be used to zero the offset voltage between the inputs, while injecting a current into the inverting input will not accomplish this well. The reason is that the input offset is the difference in voltage drop of two base-emitter diodes (transistors Q1 and Q2 in Figure 2 ). Because of the exponential characteristic, a large percentage change in current is needed to shift a diode-drop to the required value.
https://www.electro-tech-online.com/custompdfs/2012/12/snaa004.pdf