2019-01-11
Bring your AD2 and a breadboard to class.
Continue with the worksheet from Wednesday 2019-01-09_handout in G-Drive notes folder..
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❏ Build each of the three circuits and measure the voltages for each
Vbvalue (DC or constant).
For the ones that don’t match, figure out why your prediction was incorrect.
Apply a 0-5 V triangle function to Vb.
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Set Ch1 to
Veand Ch2 toVb. -
Observe how they are 0.6V different from each other except when
Vbis small. -
Move Ch1 to
Vcand see the transition between active mode (Vc>Ve) into saturation mode (Vc≈Ve+ 0.1V). -
Finally, display
VbandVcat the same time.
2019-01-14
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Review pn junction terminology and BJT junctions.
2019-01-14_handout in G-Drive notes folder.. AKA "Weed-eater circuit"
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Start by assuming that the base current is zero of both transistors and the base-emitter junctions are forward-biased at 0.6 V.
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Use the models of npn hand model and pnp hand model to find all node voltages and transistor collector currents.
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hw02continues work on this circuit.