4_DC Biasing BJTs - MavDISK
4_DC Biasing BJTs - MavDISK
4_DC Biasing BJTs - MavDISK
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4_<strong>DC</strong> <strong>Biasing</strong> <strong>BJTs</strong> 14 of 31<br />
Use the base current equation to find the part of the input resistance due to the emitter resistor.<br />
Look at the loop equation written earlier<br />
VCC – IB RB – VBE - (β + 1)RE = 0<br />
Now draw the circuit that matches this equation,<br />
Note that the voltage drop across Re has not changed. The resistor Re is reflected back into the base input<br />
circuit and multiplied.
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