L2_1-5.9 Frequency Response Of The Common-Emitter Amplifier

L2_1-5.9 Frequency Response Of The Common-Emitter Amplifier...

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5.9 Frequency Response Of The Common-Emitter Amplifier Lecture 2 Part 1 Jan. 13, 2010 Zubair Rehman
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2 Capacitively Coupled CE Amplifier
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3
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4 Ideal DC Voltage Source (Zero Internal Resistance) Total Voltage = DC Voltage + AC Voltage v T = V DC + v ac v T = V DC v ac = 0 Total Current = DC Current + AC Current i T = I DC + i ac I DC Locus of I DC v V DC V DC - infinity < I DC < infinity + 0 I DC I DC DC Model - infinity < I AC < infinity + 0 v ac i ac Locus of i ac v v ac i ac i ac v ac = 0 Short Circuit AC Model
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5 Ideal DC Current Source (Zero Internal Conductance) i T = I DC + i ac Total Current = DC Current + AC Current i T = I DC i ac = 0 Total Voltage = DC Voltage + AC Voltage v T = V DC + v ac I DC Locus of I DC v V DC V DC - infinity < V DC < infinity + 0 V DC DC Model -infinity < v ac < infinity + 1/14/09 0 v ac i ac Locus of i ac v v ac Open Circuit AC Model + - v ac + - i ac = 0
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6 AC Reactance X C = 1 / (2 π fC) DC Resistance R series = 0 Total = DC + AC v T = V DC + v ac i T = I DC + i ac X
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L2_1-5.9 Frequency Response Of The Common-Emitter Amplifier...

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