13.3.1 Understanding ideal op-amp characteristics

• An operational amplifier (op-amp) is a high-gain electronic voltage amplifier with two inputs and one output
• The open-loop gain of an ideal op-amp approaches infinity.


  True
• The open-loop gain of a non-ideal op-amp is finite, such as 100,000.


  True
• The output impedance of a non-ideal op-amp is a finite value, such as 100 Ω
• The input impedance of an ideal op-amp is very high, approaching infinity.


  True
• A non-ideal op-amp has infinite bandwidth.

  False
• The output impedance of an ideal op-amp approaches zero.


  True
• One key characteristic of an ideal op-amp is its very high input impedance
• An ideal op-amp draws zero current from the input signal due to its infinite input resistance.

  True
• The zero output resistance of an ideal op-amp makes it suitable for buffer circuit designs
• The open-loop gain of an ideal op-amp simplifies threshold detection in comparator circuits.

  True
• The output impedance of an ideal op-amp approaches zero
• The open-loop gain of a non-ideal op-amp is finite, such as 100,000.


  True
• The output impedance of a non-ideal op-amp is finite, such as 100 Ω.

  True
• The output impedance of an ideal op-amp approaches zero
• The output resistance of a non-ideal op-amp is finite, such as 100 Ω.

  True
• Non-ideal op-amps have finite output resistance.


  True
• Match the characteristic with the type of op-amp:

  Finite Output Resistance ↔️ Non-Ideal Op-Amp

  Zero Output Resistance ↔️ Ideal Op-Amp
• What is an example application where infinite bandwidth is crucial?

  Audio amplifiers
• Order the benefits of ideal op-amp characteristics:

  1️⃣ Infinite Input Resistance

  2️⃣ Zero Output Resistance

  3️⃣ Infinite Open-Loop Gain

  4️⃣ Infinite Bandwidth
• The input impedance of an ideal op-amp approaches infinity.

  True
• The input impedance of a non-ideal op-amp is finite
• The bandwidth of a non-ideal op-amp is finite, such as 1 MHz.


  True
• One key characteristic of an ideal op-amp is infinite bandwidth.

  True
• The output impedance of a non-ideal op-amp is finite, such as 100 Ω
• Match the op-amp characteristic with its ideal and non-ideal values:

  Input Impedance ↔️ Very high (approaches infinity) for ideal, finite (e.g., 1 MΩ) for non-ideal

  Output Impedance ↔️ Very low (approaches zero) for ideal, finite (e.g., 100 Ω) for non-ideal

  Open-Loop Gain ↔️ Very high (approaches infinity) for ideal, finite (e.g., 100,000) for non-ideal

  Bandwidth ↔️ Infinite for ideal, finite (e.g., 1 MHz) for non-ideal
• The open-loop gain of an ideal op-amp approaches infinity
• A non-ideal op-amp has infinite input impedance.

  False
• The infinite input resistance of an ideal op-amp prevents loading
• The open-loop gain of an ideal op-amp is finite.

  False
• An operational amplifier (op-amp) is a high-gain electronic voltage amplifier
• The bandwidth of an ideal op-amp is finite.

  False
• Real op-amps have finite values for their characteristics, unlike ideal op-amps with infinite or zero values
• The bandwidth of a non-ideal op-amp is finite, such as 1 MHz
• The open-loop gain of an ideal op-amp is finite.

  False
• An ideal op-amp has an infinite input resistance
• An ideal op-amp has a zero output resistance
• The open-loop gain of an ideal op-amp is infinite
• An ideal op-amp's infinite bandwidth allows it to amplify signals across all frequencies without distortion.

  True
• Ideal op-amps draw no current from input signals due to zero input bias current.

  True