Feedback resistance is as simple as it sounds. Feedback is someone other than our self looking at something we did and tell us their opinion. When we are resistant to their suggestions we are show feedback resistance.
constructive feedback
In some circumstances a filament bulb is used as a variable resistor. As the filament heats up, its resistance increases. This effect is used in some automatic gain control circuits; as the signal level increases, the changing resistance of the bulb can modify the feedback level in order to hold the level constant.
A: POSITIVE feedback will force the amplifier to sit at its rail saturated
negative feedback
in negative feedback. when an enzyme (negative feed back mechanism) produces too much of a molecule or substance that substance binds to the enzymes allosteric site to hault production of that substance (negative feedback response). and the whole process is the negative feedback loop.
output resistance decreases and input resistance increases
force feedback
force feedback
Feedback resistance is used to feed back the current obtained at output back into the circuit. Thus a virtual ground concept is developed.this is majorly used in applications of OPAMP[IC 741].
A joystick is an input to a computer. A tiny caveat is that some joysticks have feedback - so they can vibrate to simulate resistance or movement; the feedback is an output.
It can be used as a feedback and to ground unwanted signals and frequencies
Its a Game controller with a little resistance for similated driving games.
It never referred as ratio but Rather a gain A in the form of output divided by the input and implies voltage A=gain. basically is input resistance divided by the feedback resistance
Positive feedback loops are common in pathophysiological perpetuation of disease. For example, arteriosclerotic hypertension results in positive feedback mechanisms thatenhance and propagate the initial step in the chain of events, which is hypertension.
feedback feedback
Its a negative feedback,because the smaller the lumen , the higher the blood pressure because of the deposit in the vessel thus causing the resistance.
In a Voltage Shunt feedback Amplifier, the feedback signal voltage is given to base of transistor in shunt through a feedback resistor.This Shunt connection decreases the input input impedance and voltage feedback decreases the output impedance. In this amplifier input is current and output is voltage. Thus Transresistance is stabilized.Input and Output impedances are reduced by a factor of 'D'(desensitivity factor). Advantages: 1)Gain independent of device parameters. 2)Bandwidth increases. 3)Noise and non-Linear distortion decrease. 4)Prevents Loading effect. 5)Acts as good source for the next stage.