Learning Objectives:

1. State the properties of the ideal OPAMP.
2. Understand the difference between Inverting and Non-Inverting configurations.
3. State gain equations for the Inverting and Non-Inverting configurations.
4. Draw the inverting summing and differential amplifier configuration.

An ideal OPAMP has:

• Infinite input impedance
• Infinite bandwidth
• Infinite voltage gain
• Zero output impedance
• Zero power consumption

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Solved Example: 9975-01

Schmitt trigger exhibits ________ effect. (UPPCL JE Nov 2019 Shift II)

A. Hysteresis

B. Hall

C. Accelerator

D. Illumination

Correct Answer: A

Solved Example: 9975-02

Gain of a buffer amplifier is: (DSSSB JE EE Nov 2019)

A. Dependent on the circuit parameters

B. Unity

C. infinity

D. zero

Correct Answer: B

Learning Objectives:

• Demonstrate circuit analysis techniques for non-ideal op amps.
• Analyze op amp circuits assuming finite gain, non-ideal input and output resistance.
• Understand the effects of common mode gain and input resistance.

Non-Ideal characteristics in an Op-Amp:

1. Input offset voltage
2. Input bias current
3. Finite gain
4. Finite bandwidth
5. Non-infinite input impedance
6. Non-zero output impedance
7. Common-mode rejection

Solved Example: 9143-01

An op-AMP is a device having the following number of input terminals.

A. 1

B. 2

C. 3

D. 4

Correct Answer: B

Solved Example: 9143-02

If the unity-gain frequency is 5 MHz and the midband open loop voltage gain is 200,000, the cutoff frequency is:

A. 25 Hz

B. 1 MHz

C. 1.5 MHz

D. 15 MHz

Correct Answer: A