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Step 1 of 3 2.005P Consider the relation of trans-conductance and trans-resistance of an op-amp is given by, (1) Here, i is the output current. is and are the input terminal voltages. Step 2 of 3 Substitute for i in the equation (1). ...... (2) Here, A is open loop amplifier gain. is trans-conductance. is trans-resistance. Step 3 of 3 Substitute for Gm for in equation (2). =40000 Therefore, the open loop voltage gain, A of the amplifier is 40000 V/V