13.3.1 Understanding ideal op-amp characteristics

• An Operational Amplifier (Op-Amp) is a high-gain, differential amplifier
• The output terminal of an op-amp is located on the right
• An ideal op-amp with infinite input impedance draws negligible current
• What type of amplifier amplifies and inverts the input signal?

  Negative
• Which input terminal amplifies and inverts the signal?

  Inverting input
• An ideal op-amp has infinite open-loop gain.


  True
• Real op-amps have finite values for their ideal properties.

  True
• Low input impedance can cause noticeable loading effects on the input signal.


  True
• Real op-amps have infinite open-loop gain.

  False
• An ideal op-amp has infinite bandwidth.


  True
• The finite bandwidth of real op-amps is a key consideration in high-frequency circuit design
• An op-amp can be used in circuits for amplification, filtering, and signal processing
• An ideal op-amp has infinite open-loop gain.


  True
• What is the effect of high input impedance on circuit stability?

  High circuit stability
• What happens to the output of an ideal op-amp in comparator mode?

  Full voltage swing
• How does an ideal op-amp behave in comparator mode?

  Full voltage swing
• An ideal op-amp has finite bandwidth.

  False
• Real op-amps can amplify signals across all frequencies without attenuation.

  False
• Real op-amps have non-zero output offset voltage due to manufacturing imperfections
• The inverting input of an op-amp amplifies and inverts the input signal.


  True
• Order the ideal op-amp properties from highest to lowest typical values:

  1️⃣ Open-Loop Gain

  2️⃣ Input Impedance

  3️⃣ Output Impedance
• Op-amps are used in control systems for feedback and comparison.


  True
• Op-amps are used in audio amplifiers to boost signal levels
• In a simple amplifier circuit, resistors are used to set the gain and feedback characteristics
• What is the output impedance of an ideal op-amp?

  Zero
• What is the input impedance of an ideal op-amp?

  Infinite
• What is the output impedance of an ideal op-amp?

  Zero
• What is the typical bandwidth of a real op-amp?

  1 MHz
• An op-amp amplifies the sum of the voltages at its inputs.

  False
• The op-amp symbol is a triangle with three input terminals.

  False
• The finite properties of real op-amps introduce practical limitations in circuit design
• An ideal op-amp can deliver full output voltage to any load without voltage drop.


  True
• What is the open-loop gain of an ideal op-amp?

  Infinite
• Real op-amps have high output accuracy but are subject to gain limitations
• An ideal op-amp has infinite bandwidth, allowing for a wide frequency response
• Steps to consider when designing circuits requiring high-frequency operation with real op-amps

  1️⃣ Identify high-frequency requirements

  2️⃣ Select op-amp with appropriate bandwidth

  3️⃣ Test circuit for signal distortion
• What can offset voltage in real op-amps introduce in a signal amplification circuit?

  Errors in output signal
• Match the op-amp input terminal with its function:

  Inverting Input (-) ↔️ Amplifies and inverts signal

  Non-inverting Input (+) ↔️ Amplifies signal without inverting
• Real op-amps have infinite input impedance.

  False
• The non-inverting input of an op-amp amplifies the signal without inverting it.

  True