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Many RF amplifiers are single-ended input, not differential. Here is one example from NXP: Here is another example from Maxim (now owned by Analog Devices):-

Start off by ignoring the current source, by assuming the voltage at current source output is zero. The resulting circuit should look very familiar to you. Hint: inverting amplifier. Solve that circu …

Here are some suggestions to improve this design: Remove R6, or replace with much lower value R, say, 100r. It is not doing much except reducing the power dissipation in Q8. At ~1mA of bias current, …

U1.1 ( non inverting) has gain of 2, not 1. Remove R4 (make it infinite ♾️). Be careful: confirm that U1.1 is unity-gain stable for non-inverting gain of +1.

The output voltage of an opamp cannot swing past its supply rails: Vdd (positive), and Vss (negative). Sometimes Vss is connected to GND (0V), other times it is connected to a negative supply. When …

If this not an existing circuit in a real-world physical product (ie: just a simulation or a prototype one-off), then Answer #1 applies, otherwise, please refer to Answer #2. Answer #1: simulation or …

Point #1 First check that you have correctly connected the power supply to the opamp - getting this wrong will cause major problems, including over-heating. It's a good idea to use a power supply with …

You're asking the opamp to supply 7.07V peak on 8.33Ω which requires 848mA (I = 7.07V / 8.33Ω). At that voltage, 5V will be dropped across the op-amp output stage (12V - 7V = 5V), so the instantaneou …

A peak of 25A in a flyback? Very brave. :-) Assuming the 25A is indeed correct (are you missing a decimal point here, perhaps?), then let's first sort out the CT ratio you need: you will want a ver …

The schematic posted is not an exact copy of the circuit referenced by the OP in the comments; the differences mean the circuit posted by the OP will not perform as well as the referenced circuit. Hin …

The purpose of R14 is to trim the outputs, OUT1 & OUT2 to be the same voltage when the input signal is zero. This is intended to deal with real-world transistors Q1 & Q2 which are not identical; howe …

Referring to this part of your post: opamp to read out a current transformer, To be a "current transformer", the primary winding should be connected in series with the load it is monitoring, and the …

You mentioned two (2) applications that are very different; for these two applications, let's compare the pros and cons of using (a) a simple transistor solution (using only 1 or 2 transistors), and ( …

You seek an op-amp whose input common-mode range exceeds the supply rails. This is possible, and Linear Technology (LT) made a series of op-amps with this capability, they were known as "over-the-top …

From the chat-room discussion, it seems this question is part of a larger project, and I would advise reviewing all aspects of your project plan with people competent with basic RF comms technology. T …