Impedance Matching
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- čas přidán 3. 02. 2024
- In this video I explain why “impedance matching” is an important factor in maximising the transfer of power from a supply source to the load, or output.
If you are not confident about what “impedance” is, or how that relates to resistance, then please watch my last video “Impedance Explained” which can be found here:-
• Impedance Explained.
Following a viewer's comment I have now published a further follow up video which demonstrates how you could measure the output impedance of a laptop's headphone jack:-
• Measuring Output Imped...
Topic Covered
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Impedance Matching
Ohms Law
Output Impedance
Input Impedance
Maximising output power.
Electronics.
Resistance.
DC
AC
Frequency
Watts
Symbols
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V=Voltage (measured in Volts)
I=Current (measured in Amps)
R=Resistance (measured in Ohms)
Z=Impedance (measured in Ohms)
P=Power (measured in Watts)
X=Reactance (measured in Ohms)
L=Inductance (measure in Henrys)
C=Capacitance (measured in Farads) - Věda a technologie
You could also show how the source impedance dissipates more energy when the load impedance is less than the source impedance.
hi, please show how to measure a laptop's headphone impedance.
I may well do that. I take it you mean the output impedance of the laptop's headphone port opposed to the headphones themselves?
@@paulpkae That is right. I know it can change from line impedance to phone impedance, it needs to be sure it's the right one otherwise lose dynamics of sound, no-one cares this important aspect.
Another interesting aspect is that of the headphones that drain more power/current than a laptop/smartphone preamp can deliver, and is interesting to know if it's the case or not.
For me right now it's about learning electronics more than the practical aspect.
Thank you for the to-the-point lessons.
@@electrocat9 that should be straight forward enough to observe on a scope.
@@electrocat9 How are you defining "dynamics of sound"❓