Figure 6.1 Constant Voltage Biasing. Plus 12 volts is at the top of the diagram and ground is at the bottom. A resistor, R1, 39 k ohms, has one end connected to plus 12 volts. The other end connects to the base of an N P N bipolar junction transistor, BJT. The base also connects to another resistor, R2, 6.8 k ohms. The other end of R2 goes to ground. One end of a resistor, Rc, 5.6 k ohms, connects to plus 12 volts. The other end of Rc connects to the collector of the same transistor. Another resistor, R E, 1.2 k ohms, has one end connected to ground. The other end connects to the emitter of the transistor. End verbal description.
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