(1)(20) Diode Behavior
A 1N4004 diode is connected in series with a 935 precision resistor. An external
power supply provides a 10.0 V DC voltage across the diode-resistor series circuit such
that the diode is forward biased.
(a)(5) Assuming the simplied
Inductors
-time-varying currents in a circuit induce voltages.
-The unit of inductance is volts times seconds per amp or henries
-The derivation of the equivalent circuit laws for inductors in series and parallel is similar to that for
resistors
-inductor
Equivalent circuit laws for resistors
-It is common practice in electronics to replace a portion of a circuit with its functional equivalent.
-This often simplies the circuit analysis for the remaining portion of the circuit.
-Components connected in seri
Input resistance
-An important fact to keep in mind when making such measurements is that the measuring instrument
becomes part of the circuit
-The act of measuring thus inevitably changes the thing we are trying to measure because we are
adding circuitry
RC negative phase shifter and low-pass lter
-Another common use of our RC circuit can be obtained by taking the output
voltage across the capacitor
-lower frequencies are unattenuated while the higher frequencies are suppressed. This circuit is
therefore
Using the complex exponential method
for a switching problem
-While our method of complex exponentials was developed for circuits with a
sinusoidal drive voltage, it can also be applied to switching problems
-complex exponential method gives us a powerful
(1)(50) You use a simple voltage divider to bias the base of an npn transistor, as shown in
the left-hand gure below. Power is supplied using a supply with VCC = 13.5 V , and
you have chosen resistors for the divider as R1 = 9 k and R2 = 1 k. The emitter
(1)(25) You build the op-amp voltage-follower circuit, as shown in the circuit below.
vout
vin
(a)(5) Assuming normal op-amp operation, express the output voltage, vout , in terms of
vin , VCC and VEE . Justify you answer.
The circuit has negative
(1)(50) In lab, you built an emitter-follower circuit, as shown below. One good choice of
components would be R1 = R2 = 1.1 k and RE = 500 . Assume you bias the circuit
with VCC = 12.30 V . We are interested in using the emitter-follower circuit for input
Electronics Basics
-In electronics, we are interested in keeping track of two basic quantities: the currents and voltages in a
circuit.
-Current measures the ow of charge past a point in the circuit.
-The units of current are thus coulombs per second or a