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Electronics and Communication Electromagnetic Field Theory Difficulty: Medium

Which class of amplifier has the lowest collector circuit efficiency What is the condition for saturation? For an OPAMP, unity gain frequency is 10 6 if gain is 20, What is the Bandwidth of the op-amp . . . . . . . . The complex envelope of the bandpass signal $$x\left( t \right) = \sqrt 2 \left( {{{\sin \left( {{{\pi t} \over 5}} \right)} \over {{{\pi t} \over 5}}}} \right)\sin \left( {\pi t - {\pi \over 4}} \right),$$ centered about $$f = {1 \over 2}Hz,$$ is Given h[n] = {1, 2, 3, 2, 1}. It is a linear phase FIR filter because