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Why it is unsuitable for operational-amplifier to connect in open loop?
In open loop configuration the gain of the amplifier will be infinite, which in turn produces only square wave output.
How an operational amplifier can amplify DC signals?
It takes the difference between of two input and amplify by the open loop gain of the amplifier or closed loop gain of the amplifier. It is very hard to control open loop gain of 100 Db so it very seldom used
Input impedance of current shunt feedback amplifier?
The input impedance of a current shunt feedback amplifier is the open loop impedance of the amplifier divided by 1+(A*beta)
What conditions are required for an amplifier to oscillate?
An amplifier needs at least one active device (transistor or op-amp), a feedback loop, and proper phase shift to create oscillations. The loop gain of the amplifier must be greater than or equal to one and the phase shift around the loop must be 360 degrees or a multiple of 360 degrees. Additionally, some form of energy storage (inductors or capacitors) is typically required in the feedback loop to sustain oscillations.
What are the advantages of using a buffered effects loop in a guitar amplifier?
A buffered effects loop in a guitar amplifier helps maintain the tone and signal strength of the guitar's sound when using multiple effects pedals, resulting in clearer and more defined sound quality.
What is the physical significance of infinite open loop voltage gain of an ideal operational amplifier?
Distortion is estimated as closed loop gain divided by open loop gain. If the open loop gain approaches infinity, distortion approaches zero.
The gain of an operational amplifier will be maximum?
A: the gain will be maximum at the open loop configuration and decrease as frequency increases
When will a negative feedback amplifier circuit be unstable?
It will oscillate if the loop gain exceeds 1 when the phase difference round the loop is 360 degrees. The frequency of oscillation is set by the loop phase being equal to 360 degrees.
What is redundant fiber optic cable?
fiber loop application
What is the use of finding the bandwidth of an amplifier?
A: Any amplifier will have greater band with if operated open loop. It will also be very unstable so negative feedback is implemented for that reason. There is some drawback when feedback the band width of the amplifier decreases, So is important to find out if the amplifier when stable will it have the band width required
Why open loop configuration is not used for linear application?
becouse it is nt linear ... basicaly closs loop is linear .. and its loops
Reason use an op amp in a closed loop control system?
Differential Amplifier or Summing Amplifier are usually used in a closed loop control system. The error signal will be the DIFFERENCE between the setpoint value and feedback value for Differential Amplifier. Whereas for Summing Amplifier, the error signal will be the difference between the setpoint value and feedback value only if one of the value is inverted in polarity. Another reason Op Amp is used: amplify the error signal as error signals are usually very small. Hope this helps.
