What is that good for?
Two zeners in series to ground on each channel, one pointing to ground, the other to the signal...there's a resistor to ground, too and the usual input cap...
Cheers,
Tom
Two zeners in series to ground on each channel, one pointing to ground, the other to the signal...there's a resistor to ground, too and the usual input cap...
Cheers,
Tom
They limit the magnitude of the input signal, most likely to prevent the amplifier from clipping, maybe because it behaves badly when it does, or to soften the clipping characteristics.
Hello!
I might be the ESD, yes. The input goes to a 4066 solid state CMOS switch.
How does it affect the sound? Not at all?
Cheers,
Thomas
I might be the ESD, yes. The input goes to a 4066 solid state CMOS switch.
How does it affect the sound? Not at all?
Cheers,
Thomas
Zeners show non-linear capacitances high enough to affect high frequencies if source impedance is not very low
In order to clamp low level signals, zeners should be used only as continuously polarized voltage references, not directly as clamp elements, since the capacitance of the zeners by itself may be enough to unexpectedly clamp the signal while it gets charged
Thus, a much better aproach is generating a positive and a negative references through a zener to ground in series with a biasing resistor to the corresponding supply rail, and using 1N4148 diodes to clamp the signal. 1N4148 has much lower capacitance and faster 'switch' than any zener
In order to clamp low level signals, zeners should be used only as continuously polarized voltage references, not directly as clamp elements, since the capacitance of the zeners by itself may be enough to unexpectedly clamp the signal while it gets charged
Thus, a much better aproach is generating a positive and a negative references through a zener to ground in series with a biasing resistor to the corresponding supply rail, and using 1N4148 diodes to clamp the signal. 1N4148 has much lower capacitance and faster 'switch' than any zener
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