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An ordinary amplifier can have high gain but is unstable, drifts, can oscillate, etc.
An amplifier with negative feedback has lower gain but is stable, does not drift, won't oscillate, etc.
Wiki User
∙ 12y ago
Wiki User
∙ 14y agothere are four general type of feedback in amplifiers...
called feedback topologies
1.voltage sampling series mixing also called series-shunt feedback
2. current sampling shunt mixing also called shunt-series feedback
3.current sampling series mixing also called series-series feedback
4.voltage sampling shunt mixing also called shunt-shunt feedback
Wiki User
∙ 14y agothe types of feedback are positive and negative feedback
Wiki User
∙ 10y agoFeedback is a portion of output which is given to the input of an amplifier to controll its gain.
Wiki User
∙ 14y agoLA PLACE transform equations
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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 are the application of voltage shunt amplifier?
Applications of Voltage shunt feedback amplifier?
What is the difference between normal amplifier and magnetic amplifier?
normal amplifier is a mathametical operation analog the computer, magnetic amplifier is sound operation of the signal
What are the Difference Between AF Amplifier and RF Amplifier?
The amp for audio freq. is a AF amplifier. The RF amp is for radio freqs.
Can we use positive feedback in amplifiers?
Yes because an amplifier with positive feedback is an oscillator.
Types of Negative feedback amplifier?
voltage amplifier feedback current amplifier feedback transconductance feedback transresistance feedback
Difference between the negative and positive feedbacks?
In Amplifier if feedback is occures when the feedback signals is in phase with the input signal the feedback is known as Positive feedback. And the feedback is occures when the feedback signals is out of phase with the input signal the feedback is known as negative feedback.
What is current series feedback amplifier and its uses?
current series feedback amplifier=series parallel feedback amplifier or voltage to current amplifier,or TRANS CONDUCTANCE AMPLIFIER.
What is the difference between feedback and control?
difference between feedback and control
What is the difference between voltage series and current series amplifier?
The main Difference between Voltage and Current Feedback Amplifiers is in the sampled(Output) signals. In Voltage feedback the sampled signal is voltage (Vf=Beta*Vo) where Vo is the sampled signal and for current feedback it is current signal (Vf=Beta*Io).
Difference between intrinsic and extrinsic feedback?
Difference between intrinsic and extrinsic feedback?
In a feedback amplifier positive feedback produces an output that is?
A: POSITIVE feedback will force the amplifier to sit at its rail saturated
What is feedback amplifer?
A negative feedback amplifier (or more commonly known as feedback amplifier)can be defined as an amplifier which combines a fraction of the output with the input so that a negative feedback opposes the original signal.
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.
What is the application of feedback amplifier?
A: feedback is not an application but rather is a must to keep a system or amplifier stable in the linear regions
Difference between oscillator and amplifier?
The amplifier projects the audio signal into something we can comprehend. The oscillator creates a fixed or variable pitch, which is fed to the amplifier. Amplifiers are circuits which transfer an input signal into an output signal. Oscillators are autonomous circuits powered by a constant energy source. They produce a steady state signal e.g. a sinusoidal signal or a chaotic signal.
Is an amplifier a negative feedback?
Yes, Amplifire have negative feedback.
