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What is the difference between a CB amplifier and CE and emitter-follower?
I think you mean a common emitter amplifier, which is an amplifier of voltage. Emitter-follower or common collector amplifiers are used to match impedances, or to amplify power or current. The emitter-follower is a type of common emitter circuit that has a resistor between the emitter and ground. The output signal is taken from the point between the emitter and its resistor.
Why emitter follower is called so?
Because of the geometry of the common collector configuration, changes in base voltage appear at the emitter. Said another way, what happens at the base pretty much happens at the emitter, and the emitter can be said to "mirror" or "follow" the base. The emitter is a follower of the base, and the name emitter follower appeared and was used.
What is use of capacitor Ce across emitter resistance?
It can be used as a feedback and to ground unwanted signals and frequencies
Why emitter resistance RE is used?
for stability
What feedback is used in amplifier?
there are four types of feedback connetion. the one used is that which amplifies your input (Positive feedback).
Which transister is used in emitter follower circuit?
A: Any transistor of either polarity can be used as an emitter follower, The purpose of an emitter follower is to provide current to the load since it cannot provide any voltage gain
What is the difference between a CB amplifier and CE and emitter-follower?
I think you mean a common emitter amplifier, which is an amplifier of voltage. Emitter-follower or common collector amplifiers are used to match impedances, or to amplify power or current. The emitter-follower is a type of common emitter circuit that has a resistor between the emitter and ground. The output signal is taken from the point between the emitter and its resistor.
Why emitter follower is used in circuits?
The (Class C, Common Collector) Emitter Follower is used to amplify the available current from a voltage driving circuit that might be disturbed by the load impedance. If the actual voltage value is important, the emitter follower is often teamed up with an opamp which sets the emitter voltage based on the input voltage.
How many emitter stage is needed to build up an RC phase shift oscillator and wien bridge oscillator?
In an RC phase shift oscillator, one emitter follower stage is typically used to provide the required phase shift. In a Wien bridge oscillator, two emitter followers are used to achieve the required feedback and oscillation.
Why emitter follower is called so?
Because of the geometry of the common collector configuration, changes in base voltage appear at the emitter. Said another way, what happens at the base pretty much happens at the emitter, and the emitter can be said to "mirror" or "follow" the base. The emitter is a follower of the base, and the name emitter follower appeared and was used.
Why bootstrapping is used in emitter follower?
Bootstrapping is used in emitter follower circuits to increase the input impedance and improve linearity. By connecting a capacitor from the output to the input, it allows the input signal to be effectively "lifted" above ground, reducing loading effects and enhancing the overall performance of the circuit. This technique minimizes distortion and allows for better voltage tracking, making the emitter follower more efficient in signal amplification applications.
The output voltage of an emitter follower is?
the same as the base minus Vbe drop. used for more power transfer
What is use of capacitor Ce across emitter resistance?
It can be used as a feedback and to ground unwanted signals and frequencies
What are three configurations that can be used with FET devices?
configurations of Common-source (CS), Common-drain (CD) or Source-follower (SF) and the Common-gate (CG) available for most FET devices. These three JFET amplifier configurations correspond to the common-emitter, emitter-follower and the common-base configurations using bipolar transistors.
Which kind of feedback is used to reinforce correct behavior?
constructive feedback
In C-E configuration an emitter resistor is used for?
In a common-emitter (C-E) configuration, an emitter resistor is used primarily to provide temperature stability and improve linearity of the amplifier. It helps to stabilize the operating point by reducing the effects of temperature variations and transistor beta fluctuations. Additionally, the emitter resistor introduces negative feedback, which enhances linearity and bandwidth while reducing distortion. However, it also reduces the overall voltage gain of the amplifier.
What is the theory of voltage series feedback amplifier?
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.
