6.40 Consider a transistor forwhich the base–emitter voltage drop is 0.7 V at 10 mA. What current flows for v BE = 0.5 V? Evaluate the ratio of the slopes of the i C –v BE curve at v BE = 700 mV and at v BE = 500 mV. The large ratio confirms the point that the BJT has an “apparent threshold” at v BE 0.5 V.

image 227 1 - 6.40 Consider a transistor forwhich the base–emitter voltage drop is 0.7 V at 10 mA. What current flows for v BE = 0.5 V? Evaluate the ratio of the slopes of the i C –v BE curve at v BE = 700 mV and at v BE = 500 mV. The large ratio confirms the point that the BJT has an “apparent threshold” at v BE 0.5 V.

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images - 6.40 Consider a transistor forwhich the base–emitter voltage drop is 0.7 V at 10 mA. What current flows for v BE = 0.5 V? Evaluate the ratio of the slopes of the i C –v BE curve at v BE = 700 mV and at v BE = 500 mV. The large ratio confirms the point that the BJT has an “apparent threshold” at v BE 0.5 V.

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