A triode has mutual conductance = 2.0 millimho and plate resistance = 20 kΩ. It is desired to amplify a signal by a factor of 30. What load resistance should be added in the circuit?

Given gm=2millimho=2×10-3mho, rP=20 kΩ, A=30


Here,


where rp is the plate resistance and gm is the trans-conductance



We know,


where A is the voltage gain, μ is the amplification factor, RL is the load resistance and rp is the plate resistance




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