EE 305 Final
A non-inverting amplifier
provides a positive voltage gain
You have a circuit with four sources embedded. To find the total current through one of the resistors you use the principle of superposition. For this you take the following steps:
step 1: turn off all sources step 2: turn one source on step 3: find the requested current with the single source in the circuit step 4: turn the one source off again step 5: if you haven't turned on all sources yet, go back to step 2 and repeat with next source, otherwise proceed to step 6 step 6: add all solutions together to find the total current through the resistor
A band stop filter is designed to
stop all frequencies within a band of frequencies, w1< w<w 2
when using the concept of "virtual zero" we assume
that no currents enter or leave the input terminals and there is no voltage difference between the two input terminals.
You can use the dummy version of mesh current analysis to find the unknown mesh currents when
there isn't an ideal current source in the circuit
You have a circuit with three sources. To find the total voltage across one specific resistor using the principle of superposition you need to find the voltage across this resistor
three times and add up the results
A capacitor is a device
which stores electric energy.
An inductor is a device
which stores magnetic energy.
Given is the following complex number: z1 = √2 + j √2 (both numbers are square root of 2) This number is given in the polar form by
z1 = 2e^jπ/4
The impedance of an inductor in series with a capacitor is given by
ZLCseries = jωL + 1/jωC
The impedance of a resistor is given by
ZR = R
Given is a parallel plate capacitor. It has a capacitance C1. If we reduce the distance between the plates to half of the original distance the new capacitance C2 is given by
C2 = 2C1
Given is a parallel plate capacitor. It has a capacitance C1. If we double the distance between the plates the new capacitance C2 is given by
C2 = C1/2
We have two series capacitors, C1 and C2. The equivalent capacitance is
Ceq = (C1C2)/(C1 + C2)
Given is a long cylindrical coil. It has an inductance L1. If we double the cross section of the coil the new inductance L2 is given by
L2 = 2L1
Given is a long cylindrical coil. It has an inductance L1. If we double the number of windings the new inductance L2 is given by
L2 = 4L1
Given is a long cylindrical coil. It has an inductance L1. If we double the length of the coil the new inductance L2 is given by
L2 = L1/2
We have two parallel inductors, L1 and L2. The equivalent inductance is
Leq = (L1L2)/(L1 + L2)
We have two series inductors, L1 and L2. The equivalent inductance is
Leq = L1 + L2
The peak-value phasor corresponding to the following signal v(t) = 25V cos(ω t + π/4)
V = 25Ve^jπ/4
complex power is measured in
VA
reactive power is measured in
VAR
admittance of an inductor between two nodes
Y = -1/(jωL)
admittance of a capacitor between two nodes
Y = -jωC
The admittance of a capacitor and a resistor in parallel is given by
YC||R = jωC + 1/R
The admittance of an inductor in parallel with a capacitor is given by
YL||C = 1/jωL + jωC
The admittance of a resistor is given by
YR = 1/R
The admittance of a resistor in parallel with an inductor is given by
YR||L = 1/R + 1/jωL
The impedance of a capacitor is given by
ZC = 1/jωC
An ideal capacitor is
a passive element
An ideal inductor is
a passive element
To zero out a voltage source it must be replaced by
a short circuit
An operational amplifier is
an active element
To zero out a current source it must be replaced by
an open circuit
You want to choose the signal of one particular TV station. What kind of filter do you use:
band pass
A quantity that contains all the power information in a given load is the
complex power
an inductor
consists of of a coil usually wound around a core material.
The two input terminals of an operational amplifier are labeled as:
inverting and non-inverting
Usually the feedback loop connects the output terminal with the negative input terminal. This is called
negative feedback
an active filter consists
of an op-amp and the elements R,L, and C.
A passive filter consists
of the elements R,L, and C.
A low pass filter is designed to
only pass frequencies from DC (0Hz) up to the cutoff frequency wc.