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What is the input to the op-amp used in the room noise detector circuit?
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∙ 11y ago
microphone
Wiki User
∙ 11y ago
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What is the applications opamp buffer circuit?
An opamp buffer circuit is one where the input signal is connected to the plus input, and the output is connected to the minus input. Within the performance limitations of the opamp, the output will track the input. The advantage of the buffer circuit is that is presents very little load impedance to the input signal, while providing a low impedance from the output to drive whatever circuitry is connected there.
What does 10 megohm input impedance mean?
10 megohms is the resistance through which 10 volts would push 10 microamps of current. Input impedance is the resistance seen by a signal source when connected to the input Often, this means there is a 10 megohm resistor in series with the input going to a virtual ground on an opamp circuit. 10 megohms is a common input impedance for a digital voltmeter.
Why the input resistance of opamp is high?
Because op amp consist differential amplifier and they posses high input impedance so that op-amp also posses high input impedance.
Why output impedence is high in opamp?
Output impedance in an op-amp is not high - it is low - input impendance is high, and this is because the input stage transistors have high gain.
What are the two basic configurations in operational amplifier?
opamp is a device used to amplify ac as well as DC input signals. It is called as operational amp becoz it is used to perform all mathematical operations. Symbol of opamp indicates the direction of current.
Give the definition of output offset voltage of Op-Amp?
The output voltage of a opamp when the input of inverting and non inverting terminals are grounded
Is OP-amp a discrete component?
An opamp is a circuit of many components. It may either be built of many discrete components or be a single integrated component.
How do you bias a current mirror opamp?
If you go to the given link you will see the circuit of a current mirror using Op-Amp. And you can easily see how it is biased.
How is a opamp generated?
An op-amp, or OPerational AMPlifier, is simply a pre-built transistor amplifier circuit on a self-contained integrated circuit chip (usually one chip holds multiple op-amps)
Can you use the op-amp as timer?
yes, with additional circuitry. an opamp wired as a differentiator followed by an opamp wired as a comparator can provide short timing periods. an opamp wired as an integrator followed by an opamp wired as a comparator, plus some other circuits left as an exercise to the reader can provide long timing periods.
Why emitter follower is used in circuits?
The (Class C, Common Collector) Emitter Follower is used to amplify the available current from a voltage driving circuit that might be disturbed by the load impedance. If the actual voltage value is important, the emitter follower is often teamed up with an opamp which sets the emitter voltage based on the input voltage.
Similarity between opamp and comparator?
A comparator is simply an opamp with a certain configuation of external circuitry ( a few components) that make it function as a comparator.
