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boredaxel
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I was wondering what's the main advantage of choosing one over the other, besides common drain having to suffer body effect. How do we determine if a CC is better or a CD is better to use as a buffer?
Finally getting back to the "good ol' days" of the familiar cathode bias circuits.vk6kro said:[Something like an MPF102 actually requires a negative voltage on the gate (relative to the source) to bias it.
This makes the biassing a little more complex as a large source resistor may be needed for the load but a smaller one may be needed for the biassing. So, such circuits often have both.
They have a small bypassed source resistor for bias purposes and a larger unbypassed one for the load. A gate resistor takes the voltage between the two to the gate.
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A common collector amplifier is a type of circuit where the input signal is applied to the base of a transistor and the output is taken from the emitter. In a common drain amplifier, the input signal is applied to the gate of a field-effect transistor (FET) and the output is taken from the source.
Common collector amplifiers are more commonly used in electronic devices because they have a higher voltage gain and lower input impedance compared to common drain amplifiers.
The purpose of using a common collector or common drain amplifier is to amplify a small input signal to a larger output signal. This is commonly used in audio amplifiers, signal processing circuits, and communication systems.
A common drain amplifier has a higher output impedance compared to a common collector amplifier. This means that it is better suited for driving high impedance loads, such as speakers or long transmission lines.
Yes, a common collector and common drain amplifier can be used together in a circuit to achieve a higher overall voltage gain. This is commonly known as a cascode amplifier, where the output of the common collector amplifier is connected to the input of the common drain amplifier.