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FET Audio Mute | Electronics Forums
https://www.electronicspoint.com/forums/threads/fet-audio-mute.99726/
The audio signal. is is < 2V p-p. Essentially audio signal passes through a enhanced n-mosfet connect to. source. The drain goes into a load which is what ever load the would have. been connected to it in the first place. The base of the fet is connected to -5V. The gate is connected to a STDP.
Muting Circuits For Audio
https://www.sound-au.com/articles/muting.html
To un-mute the audio, a negative voltage is applied to the gate, turning off the JFET and removing the 'short' it creates. Unlike a relay, JFETs have significant resistance when turned on. The J11x series are often used as muting devices, and while certainly effective, the source impedance has to be higher than with a relay.
JFET Audio Mute Switch
http://www.redwaveradio.com/5_5ee107db307c7a37_1.htm
JFET Audio Mute Switch. in the audio chain of a simple superhet xcvr. I'm using the T/R. switch from the SW30+ qrp rig. The final PA in the transmitter chain. is a 74HC240 which is putting out about 1/2 watt. On transmit the. slightly) and is ear splitting loud. I …
Audio soft mute using optically isolated MOSFET
https://electronics.stackexchange.com/questions/325777/audio-soft-mute-using-optically-isolated-mosfet
Audio soft mute using optically isolated MOSFET. Ask Question Asked 4 years, 5 months ago. Active 1 year, 10 months ago. Viewed 2k times ... I had to use the same signal that feeds the relay's coil when that triggers I'm creating a pulse which should open the MOSFET, short the path to ground and keep it that was for about 0.2ms which is enough ...
Muting Transistor Attenuator Circuits and the 2SC2878 ...
https://www.electroschematics.com/muting-transistor-attenuator-circuits-2sc2878/
Obviously, the function of muting circuits is to mute (kill) the audio signal. This can be done in a number of ways including switches, relay contacts, junction FETs, analog switches and bipolar muting transistors. Switch and relay contacts can be noisy and intermittent due to contact bounce. Furthermore, properly applied contacts must be dry ...
Audio output muting circuit | All About Circuits
https://forum.allaboutcircuits.com/threads/audio-output-muting-circuit.177462/
N channel jfet gives a bit of sound distorsion when the voltage slowly descend towards 0. Relay completely cut away but can hear the transient as a sort of click (negligible). i wonder if a comparator could be used feed a J108 (i used a J109) so that as soon as power is off, the comparator cuts instantly its output (to jFet gate).
Audio Switch Notes - Neat Circuits
https://www.neatcircuits.com/audiosw/index.html
A simple J-FET switch is easy to accomplish. The use of a P-channel J-FET is required. The more common N-channel will not give the same results, especially fading. ... The circuit should mute sufficiently any audio from 15 hz to 20 khz. Mute level should *easily* reach -50db. If not, you don't have the circuit wired correctly.
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