Ever heard of Source impedance ? and the impedance of an arc-- talk ) 01 : 09, 10 January 2009 ( UTC)
12.
On fine jazz guitars, the parallel wiring produces significantly cleaner sound, as the lowered source impedance drives capacitive cable with lower high frequency attenuation.
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*Because the input impedance is so low, most signal sources have larger source impedance than the common base amplifier " R in ".
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However, if the source impedance is significantly larger than the feeder impedance then the characteristic of the IDMT relay cannot be exploited and DTOC may be utilized.
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A related case, but one which does not occur often in audio, is to optimize the power delivered to the load when the source impedance is unchangeable.
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Transmission loss does not involve the source impedance and the radiation impedance inasmuch as it represents the difference between incident acoustic energy and that transmitted into an anechoic environment.
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With a 150-ohm source impedance and 1200 pF load capacitance, the frequency response of this RC circuit is-0.02 dB at 20 kHz.
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Secondly if the source impedance varies and becomes weaker with less generation during light loads then this leads to slower clearance time hence negating the purpose of the IDMT relay.
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Each antenna is alternately connected to a transmitter having a particular source impedance, and a receiver having the same input impedance ( the impedance may differ between the two antennas ).
20.
Lower sensitivity meter movements are acceptable for testing in circuits where source impedances are low compared to the meter impedance, for example, power circuits; these meters are more rugged mechanically.
