Lecture 15_ Feb 24 2011_with example solution

# Lecture 15_ Feb 24 2011_with example solution - Chap 17.3...

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Review Session Bipolar Junction Transistors and Circuits Lecture 15 Cover Chapters: 5, 10, 13

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Practice Examples Chap 17.3 Bipolar junction transistor (BJT) function is usually considered in terms of currents: a relatively small current through one of the transistor's terminals exerts control over a much larger current. Draw the directions of all currents for these two transistors (one NPN and one PNP), clearly identifying which of the currents is doing the control, and which of the currents is being controlled:
Practice Examples Chap 17.3 Describe what the output voltage of this transistor circuit will do (measured with reference to ground), if the input voltage ramps from 0 volts to -10 volts (measured with respect to ground): V out will remain at 0 volts the entire time.

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Practice Examples
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Unformatted text preview: Chap 17.3 The following circuit is a three-channel audio mixer circuit, used to blend and amplify three different audio signals (coming from microphones or other signal sources). Suppose we measured a 9 kHz sinusoidal voltage of 0.5 volts (peak) at point Ä" in the diagram, using an oscilloscope. Determine the voltage at point "B" in the circuit, after this AC signal voltage "passes through" the voltage divider biasing network. The voltage at point "B" will be a mix of AC V B = 1.318 VDC + 0.5 VAC (peak) Practice Examples Chap 17.3 The following graph is a family of characteristic curves for a particular transistor: Draw the load line and identify the Q-point on that load line for a common-emitter amplifier circuit using this transistor:...
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Lecture 15_ Feb 24 2011_with example solution - Chap 17.3...

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