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sherrellbc
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When using the CE BJT amplifier configuration, when a shunt capacitor is placed across the collector resistor, how does this act as a bandwidth limiting cap?
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A CE amplifier is a type of common-emitter amplifier that uses a bipolar junction transistor (BJT) to amplify an input signal. The term CE stands for "common emitter," which refers to the configuration of the BJT in the amplifier circuit.
In a CE amplifier, the input signal is applied to the base of the BJT, while the output signal is taken from the collector. The emitter is grounded, creating a common reference point for both the input and output signals. The BJT acts as a voltage-controlled current source, amplifying the input signal at the collector and providing a larger output signal.
Bandwidth refers to the range of frequencies that a CE amplifier can accurately amplify without distortion. This is an important parameter to consider when designing an amplifier, as it determines the range of signals that the amplifier can effectively amplify.
The bandwidth of a CE amplifier can be limited by using a combination of capacitors and resistors in the amplifier circuit. These components act as filters, allowing only a certain range of frequencies to pass through the amplifier and be amplified. This is known as frequency compensation.
Limiting the bandwidth of a CE amplifier can improve the stability and linearity of the amplifier. By filtering out unwanted frequencies, the amplifier can operate more efficiently and accurately, reducing distortion and improving overall performance.