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Questions and Answers
A typical use of the operational amplifier is to provide ______ amplitude changes.
A typical use of the operational amplifier is to provide ______ amplitude changes.
voltage
An op-amp contains a number of ______ amplifier stages to achieve a very high voltage gain.
An op-amp contains a number of ______ amplifier stages to achieve a very high voltage gain.
differential
Single-ended input operation results when the input signal is connected to the one input with the other input connected to the ______.
Single-ended input operation results when the input signal is connected to the one input with the other input connected to the ______.
ground
When the same input signals are applied to both inputs, ______ operation results.
When the same input signals are applied to both inputs, ______ operation results.
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In a differential amplifier, signals that are opposite at the inputs are highly ______.
In a differential amplifier, signals that are opposite at the inputs are highly ______.
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The differential amplifier circuit is an extremely popular ______ used in IC units.
The differential amplifier circuit is an extremely popular ______ used in IC units.
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DC ______ is a feature of operational amplifier circuits.
DC ______ is a feature of operational amplifier circuits.
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The differential connection tends to provide attenuation of unwanted input while providing an amplified output of the ______ signal applied to the inputs.
The differential connection tends to provide attenuation of unwanted input while providing an amplified output of the ______ signal applied to the inputs.
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An ideal operational amplifier (op amp) behaves with a very high gain as a ________ amplifier.
An ideal operational amplifier (op amp) behaves with a very high gain as a ________ amplifier.
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The initial purpose of operational amplifiers was to execute ________ operations in analog electronic calculating machines.
The initial purpose of operational amplifiers was to execute ________ operations in analog electronic calculating machines.
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Operational amplifiers are integrated circuits composed of many ________ and resistors.
Operational amplifiers are integrated circuits composed of many ________ and resistors.
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In a double-ended input, signals are applied at each ________.
In a double-ended input, signals are applied at each ________.
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Operational amplifiers are convenient building blocks used to build ________, filters, and even an analog computer.
Operational amplifiers are convenient building blocks used to build ________, filters, and even an analog computer.
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The output of a double-ended output operational amplifier are always ________ in polarity.
The output of a double-ended output operational amplifier are always ________ in polarity.
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Operational amplifiers have a high ________ impedance and low output impedance.
Operational amplifiers have a high ________ impedance and low output impedance.
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The invention of the ________ shrunk the size of operational amplifiers.
The invention of the ________ shrunk the size of operational amplifiers.
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A differential amplifier has two separate _____ and two separate outputs.
A differential amplifier has two separate _____ and two separate outputs.
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Most differential circuits use two separate _____ supplies, but a series circuit can also operate using a single supply.
Most differential circuits use two separate _____ supplies, but a series circuit can also operate using a single supply.
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An operational amplifier is a very high gain _____ amplifier with a high input impedance.
An operational amplifier is a very high gain _____ amplifier with a high input impedance.
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The ideal op-amp has two inputs and one _____.
The ideal op-amp has two inputs and one _____.
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The op-amp has a very high _____ and can be connected open-loop or closed-loop.
The op-amp has a very high _____ and can be connected open-loop or closed-loop.
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The equivalent circuit of the ideal op-amp is modeled by a _____ circuit.
The equivalent circuit of the ideal op-amp is modeled by a _____ circuit.
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The op-amp has a high input _____ (typically a few meg-Ohms).
The op-amp has a high input _____ (typically a few meg-Ohms).
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Study Notes
Operational Amplifiers
- An operational amplifier (op-amp) is a high-gain differential amplifier with high input impedance and low output impedance.
- Typical uses of op-amps include providing voltage amplitude changes, oscillators, filters, and instrumentation circuits.
Input Operations
- Single-ended input operation occurs when the input signal is connected to one input, and the other input is connected to ground.
- Double-ended input operation occurs when signals are applied to both inputs.
Common-Mode Operation and Rejection
- Common-mode operation occurs when the same input signals are applied to both inputs.
- Ideally, the two inputs are equally amplified, resulting in opposite polarity signals that cancel each other out.
- Common-mode rejection occurs when the op-amp rejects signals that are common to both inputs, amplifying only the difference signal.
Differential Amplifier Circuit
- The differential amplifier circuit is a popular connection used in IC units.
- It has two separate inputs, two separate outputs, and the emitters are connected together.
- The circuit can operate using a single or dual voltage supply.
Key Characteristics of Op-Amps
- Op-amps have a very high gain and a high input impedance (typically a few meg-Ohms).
- They have a low output impedance (less than 100 W).
- Op-amps can be connected in open-loop or closed-loop configurations.
Ideal Operational Amplifier
- An ideal op-amp has infinite gain, infinite input impedance, and zero output impedance.
- It can be modeled as a simple equivalent circuit.
- Op-amps can be used in voltage comparator and inverting amplifier circuits.
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Description
This quiz covers the basics of operational amplifiers, their applications, and configurations such as single-ended input operation.
