what is input offset current & input offset voltage?

Answer 1

I'm sure you're referring to a differential amp. They are both caused by mismatches usually in the input transistors. Offset current is defined as the difference between the input currents
when the two inputs are shorted and offset voltage is the amount of voltage difference that must be applied to the two inputs to balance the amplifier output at midpoint with no feedback.

Answer 2

ed031639 is extremely suited. plenty relies upon on the circuit format and sign coupling attitude used. In a ordinary op-amp, even besides the undeniable fact that babies that the enter impedance of the device is often very large, there'll continuously be some leakage modern-day flowing there. consequently, this creates an enter offset DC voltage. because of the fact the op-amp has income, this DC offset voltage is consequently amplified for the time of the quantity of the circuit income, and seems on the output of the op-amp as a extensive +/- DC voltage. in accordance with format, this huge DC output offset voltage can effect the amplifier's working useful properties mutually with linearity, output skill, and so on. Output offset voltage is often neutralized, adjusted to 0 DC volts, by way of making use of an opposite polarity DC voltage cost to the op-amp's non-inverting enter by way of way of a few form of voltage divider community. Then regulate that DC voltage element so the DC offset voltage on the output of the op-amp is 0 volts. digital earth is a grounding element contained interior the circuit or device itself it fairly is above direct earth floor. it is going to likely be seen as some thing of a floating-floor.

Answer 3

The input offset voltage ( ) is a parameter defining the differential DC voltage required between the inputs of an amplifier, especially an operational amplifier (op-amp), to make the output zero (for voltage amplifiers, 0 volts with respect to ground or between differential outputs, depending on the output type).

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