7.20 The essence of transistor operation is that a change in v BE, vBE, produces a change in iC, iC. By keeping vBE small, iC is approximately linearly related to v BE, iC = gm vBE, where gm is known as the transistor transconductance. By passing iC through RC, an output voltage signal vO is obtained. Use the expression for the small-signal voltage gain in Eq. (7.20) to derive an expression for gm. Find the value of gm for a transistor biased at IC = 0.5 mA.

20 13 - 7.20 The essence of transistor operation is that a change in v BE, vBE, produces a change in iC, iC. By keeping vBE small, iC is approximately linearly related to v BE, iC = gm vBE, where gm is known as the transistor transconductance. By passing iC through RC, an output voltage signal vO is obtained. Use the expression for the small-signal voltage gain in Eq. (7.20) to derive an expression for gm. Find the value of gm for a transistor biased at IC = 0.5 mA.

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images - 7.20 The essence of transistor operation is that a change in v BE, vBE, produces a change in iC, iC. By keeping vBE small, iC is approximately linearly related to v BE, iC = gm vBE, where gm is known as the transistor transconductance. By passing iC through RC, an output voltage signal vO is obtained. Use the expression for the small-signal voltage gain in Eq. (7.20) to derive an expression for gm. Find the value of gm for a transistor biased at IC = 0.5 mA.

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