* Question
| How to master the skills of selecting voltage feedback and current feedback op amps? |
* Answer
| This article does not explain in detail all the differences and options between the current feedback amplifier and the voltage feedback amplifier, but we can list some key points.First, the design equations for voltage feedback amplifiers are equally applicable to current feedback amplifiers, so there is no need to learn new content.The voltage feedback amplifier has two high input impedance nodes, the current feedback amplifier has only one high-impedance non-inverting input, and the inverting input is a low-impedance input.The voltage feedback amplifier has an “open loop gain” and the current feedback amplifier has an “open loop resistance”.Unlike voltage feedback amplifiers, feedback Resistorss play an important role in the stability of current feedback amplifiers, which limits the choice of feedback Resistorss (resistance values can be found in the manufacturer’s data sheet) and limitsGain sets the resistance of the Resistors.The current feedback amplifier provides another powerful option when engineers design circuits. The following are information about current feedback amplifiers and voltage feedback amplifiers. Next time you want to use a voltage feedback amplifier, you can take a closer look at your hand.You may be able to find a more desirable option. |
COMMENTS