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A basic, single transistor amplifier differs from an op amp:
1. The op amp has more gain
2. The op amp may have higher input resistance (so it loads the circuit less)
3. The op amp may have a lower output resistance (so it can drive larger currents)
4. The op amp likely has a lower frequency response (due to the high gain, unless you provide some sort of feedback loop)
5. The op amp is ridiculously complex compared to a simple amplifier
6. The op amp will require a positive and negative voltage (may be unnecessary with a single transistor amplifier)
What else can I help you with?
What happens when magnitude of Vcc and Vee of op-amp are different?
When the magnitude of Vcc and Vee of op-amp are different the op-amp produces waveforms equal in the size of each rail.
Which characteristics of Op-Amp is responsible for virtual ground?
The main parameter responsible for virtual ground of an Op-Amp is Input Impedance . Generally , for an Op-Amp it is very high . So , we can conclude that the characteristics of an Op-Amp responsible for virtual ground is high input impedance .
What is LM312T?
op-amp
Why feedback is used in op-amp?
Feedback in used in an op-amp to limit and control the gain. An op-amp, by itself, has very high gain, often more than 100,000. (A theoretical op-amp has infinite gain.) The external feedback loop forms a divider, more correctly a bridge, that is maintained in balance by the op-amp, giving the desired real gain.
How can an OP-AMP be nulled?
op-amp can be nulled using offset voltage about +/- 1.5 mv to offset pins
What is use of 8th pin in op-amp?
This may vary from one op-amp to another, consult the datasheet.
How can an op amp comparator circuit be used for converting sine to square wave?
The wording are confusing an op-amp is an op-amp a comparator is another animal. an op-amp can be used as square wave generator by overdriving it but the results are not desirable. However a comparator will be a switch on-off at the set level.
What is a difference between an operational amplifier and instrumentation amplifier and can you use one opamp to perform a same task as 3 opamp instrumentation amplifier?
An op amp is made from transistors, resistors and capacitors. It is enclosed in a "chip". A basic instrumentation amp is made of 2 op-amps. you can't have a single op-amp perform as good as a instrumentation amp, although it can perfrom the same task. An i-amp has much better CMMR (common-mode rejection) and a higher input impedance.
What are the ideal op-amp approximations?
Ideal op amp approximations: -no current goes into the positive or negative input of the op amp. -The open loop gain is infinite. -Voltage at positive input is the same as the negative input.
How gain varies with bandwidth in an op-amp?
The gain of an op amp varies with frequency. After an op amp reaches the half-power point, the gain falls appreciably. And then once it hits the transition frequency, the op amp no longer provides any gain.
How do you use OP-AMP as common compensator?
i know that an op amp can be used as an amplifier and a switch, but i want to have more uses of the component or device.
What is linear op amp?
It's an op amp (operational amplifier) with a linear response, meaning that double the input means double the output.
