The bandwidth should be slightly larger than the actual bandwidth of the operating frequencies involved, and should be able to operate from the lowest used frequency to the highest frequency and inclusive of the frequencies between those two parameters.
Another consideration would be the application for which it's used, as there are instances where the bandwidth needs to be limited, to prevent items such as `bleed over' and for the conservation of radio spectrum.
Since your question is in general terms, I can only supply a general answer, and the bandwidth of your amplifier may be required to be very narrow and limited (narrow band) or wide (wide band).
Direct coupled amplifier
As gain increases bandwidth decreases.
an amplifier, where the resistor and capacitor get coupled to provide high oscillations hence by which amplifications increases at high degrees
One of the several uses of an RC coupled amplifier is to amplify the given input signal. It makes use of a sinusoidal input signal.
what happens if we remove Rc in RC coupled amplifier
Loading of Rc coupled amplifier occurs, if you doesnt use coupling capacitors...... If avoiding input coupling capacitor the amplifier will load the function generator.. For more details go to http://mycircuits9.blogspot.com
The gain of an r-c coupled amplifier falls at high frequency because the capacitive reactance of the capacitor tends to zero.
ya
A: DC couple amplifiers refers to stages of amplifiers where is the biasing is direct without adding capacitors to remove the DC component from amplifier to amplifier
Quite simply, it's an amplifier wherein the stages as set up so that the output of one stage is coupled directly into the input of the next stage without any wave shaping or tuninig components between them. This makes for fairly flat frequency response. A link is provided to the Wikipedia article on direct coupling.
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