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ece250 BJT Formula Sh Test 2

# ece250 BJT Formula Sh Test 2 - ECE250(KEH BJT Formula...

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( Note, you must know how to derive these, if asked on the test) R in 1 1 R1 1 R2 + 1 r π β 1 + () Re 1 + + = R out Rc ro Rc ro + = Avo β Rc ro Rc ro + r π β 1 + () Re 1 + = DC Load Line: Ic intercept = (Vcc-Vee)/(Rc+Re) Vce intercept = Vcc-Vee Slope = -1/(Rc+Re) Note: Vee = 0 in a single-ended dc power supply AC Load Line Slope = -1/([Rc // ro // R L ] + Re1) Note: Re1 is unbypassed portion of Re For CC (Emitter Follower) Amplifier : (Note, you must know how to derive these, if asked on the test) Rbin r π β 1 + () 1 1 Re 1 ro + 1 R L + + = R in 1 1 Rbin 1 R 1 + 1 R 2 + = Av o β 1 + () Re ro Re ro + r π β 1 + () Re ro Re ro + + = Rout = (Re // ro) // (r π + R 1 // R 2 // Rs) / ( β + 1) NOTE: For "Rin_no_R L ", leave R L out of the Rbin formula. AC Load Line Slope = -1/(Re // ro // RL) General Voltage Amplifier Model Voltage, Current, Power Gains: Av = vout/vs = Rin / (Rs + Rin)*Avo*R L / (Rout + R
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