I am designing a circuit to pulse width modulate speech through a circuit consisting of an Astable 555 and a Monostable 555.
The modulating signal input is fed through a capacitor into Pin 5 of the monostable 555.
Now, my question is regarding the capacitor on the input to PIN5.
What does this value control?
I have read that the control input must be AC coupled to ensure this cap is charged.
I have also been told it may have something to do with the 600 ohm impedance of the signal generator.
Any tips here much appreciated.
The modulating signal input is fed through a capacitor into Pin 5 of the monostable 555.
Now, my question is regarding the capacitor on the input to PIN5.
What does this value control?
I have read that the control input must be AC coupled to ensure this cap is charged.
I have also been told it may have something to do with the 600 ohm impedance of the signal generator.
Any tips here much appreciated.
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