Reversed polarity is not a problem as long as the voltage is below the breakdown voltage which is 5-7 V up to 15 V depending of transistor type.AndrewT said:With digital where there may be a permanent voltage bias on the muted line then reversal will not apply.
On analogue where the line to be muted is AC then the muting semiconductor is repeatedly suffering reverse polarity.
A relay avoids this problem but substitutes a bit of capacitance which must be designed for.
Hi Peranders,peranders said:
Reversed polarity is not a problem as long as the voltage is below the breakdown voltage which is 5-7 V up to 15 V depending of transistor type.
My anwser to this is that the mute transistor has a very little influence on the sound. 100 ohms plus a couple of pF isn't very harmful in a low impedance circuit.
Conrad Hoffman said:The other possibility is that this is another audio myth, where one hears the effect just because the seed of the idea has been planted. A properly designed mute circuit shouldn't affect the signal to any significant degree, and it can certainly be done with transistors or FETs.
I think also that this is rather weird but the best thing for you to understand is to test it live.AndrewT said:
my electronics knowledge is struggling to cope with this.
Talk me through the physics as the signal starts to reverse polarity, for the conditions with the muted and unmuted transistor in place.
dhaen said:As the junction is reverse biased there will be a varactor capacitance effect, though my feeling is that the amount will not be significant.
edit: typo corrected