3.3 KiB
Glossary
Impedance (Z)
In electrical engineering, impedance is the opposition to alternating current presented by the combined effect of resistance and reactance in a circuit.
formulas#Impedance in a Circuit
Input Impedance (Z_{in})
Output Impedance (Z_{out})
Reactance (X)
Reactance is resistance related to frequency
Voltage (V)
Voltage, electric potential difference, electric pressure or electric tension is the difference in electric potential between two points.
Resistance (R)
The electrical resistance of an object is a measure of its opposition to the flow of electric current.
Capacitance (C)
Capacitance is the ability of a component or circuit to collect and store energy in the form of an electrical charge.
Inductance (L)
Inductance is the tendency of an electrical conductor to oppose a change in the electric current flowing through it.
Current (I)
How many electrons flow through a circuit in a second
Polarity
Means if a component is symmetric or not Polarised means that a component is not symmetric
LED
Anode - The shorter Leg Cathode - The longer Leg
Diode
Anode
The positive end of a diode
Cathode
The negative end of a diode
Conventional Current Flow
When electricity was discovered people thought the electrons flow from the positive terminal to the negative, in actuality they flow in the opposite direction, but it is still possible to calculate the flow with the old way.
Reactive Components
A component is a reactive component when it resists to changes in current or voltage.
Thevenins Theorem
Nortons Theorem
Millmans Theorem
Cutoff Frequency (f_{c})
\rightarrow filters
The frequency at which the output strength of a filter is 3dB lower than the input strength. When this frequency is passed the output signal is V_{Peak} \frac{1}{\sqrt{2}} the strength of the input signal.
High/Low Cutoff Frequency (f_{H}/f_{L})
Center Frequency
\rightarrow formulas#Center Frequency for RLC Low Pass Filter \rightarrow formulas
The midpoint between the High and the Low Cutoff Frequency,
Pass-Band
The Pass-Band is the frequency range which is allowed to pass through a filter without changes.
Stop-Band
The stopband is the frequency range which is attenuated by a filter.
Pass-Band Ripple
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Transfer Function
The Transfer function is a mathematical model of some analog filter that represents the input strength to output strength related to the frequency of the input.