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What is different of common emitter amplified with capacitor and without capacitor?
Wiki User
∙ 12y ago
It depends on where the capacitor is located. If it is across the emitter resistor, then the gain of the CE amplifier will be higher at higher frequencies.
Remember that gain in the CE amplifier is collector resistance divided by emitter resistance, or hFe, whichever is lower. Placing a capacitor across the emitter resistor will serve to make the effective resistance smaller at higher frequencies, resulting in increased gain, up to the limit of hFe.
If this is not the intended location of the capacitor, then please restate the question and provide the capacitor location.
Wiki User
∙ 12y ago
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What is the purposeof the capacitor between emitter to ground?
The purpose of capacitor between emitter to ground is to permit the transis tor to function in the depletion region without the elimination of the Q point.
What is the difference between voltage gain obtained with bypass capacitor and without the bypass capacitor?
A: A TRANSISTOR gain is determined by current flow on the collector by adding a resistor to the emitter this current flow is reduced by adding or bypassing this resistor with a capacitor the net effect is that this emitter resistor will be reduced in value as frequency increases therefore change gain as a function of frequency input
What is the most resistance that can be in series with the capacitor if the capacitor is to charge to at least 88 percent of its final voltage in no more than 8.0 s?
Without knowing the capacitance of the capacitor, your question cannot be answered.
Why does the bypass capacitor decrease the input impedance in common emitter amplifier?
You would use a supply bypass capacitor in a common collector amplifier... It's necessary, to give the positive supply rail a direct AC connection to ground. Without it, I don't think the amplifier would work properly. However, if you're using a power supply and not a battery, then chances are that it HAS a big capacitor inside it, eliminating the need for any external capacitor.
What will happen if emitter base is reversed bias and collector base is forward bias?
If emitter-base is reverse biased then there will be no amplification effect on collector-emitter. If collector-base is forward biased, it will act like a diode, but without emitter-base current, that is meaningless.
What is the output resistance of common emitter amplifier with emitter resistor and without bypass capacitor?
Without a bypass capacitor it is just equal to Rc
What is the purposeof the capacitor between emitter to ground?
The purpose of capacitor between emitter to ground is to permit the transis tor to function in the depletion region without the elimination of the Q point.
What do you mean by emitter bypass capacitor?
a capacitor that bypasses a BJT's emitter bias resistor so the emitter is at AC ground but has a DC bias voltage on it to set operating conditions. without the bypass, the bias would not stay constant.
What is the difference between voltage gain obtained with bypass capacitor and without the bypass capacitor?
A: A TRANSISTOR gain is determined by current flow on the collector by adding a resistor to the emitter this current flow is reduced by adding or bypassing this resistor with a capacitor the net effect is that this emitter resistor will be reduced in value as frequency increases therefore change gain as a function of frequency input
Can i not use a capacitor on a motor equipted with the motor?
No. You won't be able to start the motor without the capacitor.
What is Difference between static and dynamic latch?
static latch: a latch without capacitor dynamic latch: latch with capacitor
What is the weight of the Honda 3.2 motor?
with or without flux capacitor
You never touch a capacitor without?
thick leather gloves
Output voltage of half wave rectifier without capacitor filter is less or more than rectifier with capacitor filter?
less
What is the most resistance that can be in series with the capacitor if the capacitor is to charge to at least 88 percent of its final voltage in no more than 8.0 s?
Without knowing the capacitance of the capacitor, your question cannot be answered.
Why does the bypass capacitor decrease the input impedance in common emitter amplifier?
You would use a supply bypass capacitor in a common collector amplifier... It's necessary, to give the positive supply rail a direct AC connection to ground. Without it, I don't think the amplifier would work properly. However, if you're using a power supply and not a battery, then chances are that it HAS a big capacitor inside it, eliminating the need for any external capacitor.
What will happen if emitter base is reversed bias and collector base is forward bias?
If emitter-base is reverse biased then there will be no amplification effect on collector-emitter. If collector-base is forward biased, it will act like a diode, but without emitter-base current, that is meaningless.
