Electronics - Operational Amplifiers - Discussion

Input offset voltage is the equivalent voltage at the input of an operational amplifier. If an amplifier has a voltage gain of ten and an input offset voltage of 10 microvolts, a level of 100 microvolts will appear at the output with no input. Manufacturers try to design an op amp so the input offset voltage is as small as possible to minimize this error voltage at the output of the amplifier, especially for applications where small voltages are being amplified.

Characteristics of an ideal operational amplifier are:
1.Infinite Open Loop Gain
2.Infinite Input Impedance
3.Zero Output Impedance
4.Infinite Bandwidth
5.Zero Output Offset
6.Zero Noise Contribution

What is open loop gain?

Open loop gain is the gain of op amp without feedback.

Thanks you friends for the details

What is infinite bandwidth?

Ideal oprational amplifier has

- open loop Gain infinte
- input impedance infinite
- output impedence Zero
- bandwidth infinite
- offset voltave zero

Infinite bandwidth means op-amp work within all range of frequencies, but practically it is not possible.

Amplifier is an electronic device that increases the power of a signal. This occur due to the conversion of energy from a power supply and controlling the output to match the input signal shape but with a larger amplitude. When this is done, then an amplifier can be described as modulator of the output signal of the power supply.

What is impedance? please define in simple words.