Hi to everybody,
I am on a project where I have to switch a wire to ground or 12V. The signal on the wire is a +-1V digital signal (rectangular with max. ~27MHz frequency) . The task is to find a switching solution to take the wire down to ground, to 12v or doing nothing ( not inteferring with the signal/ high impedance). The Control signal to turn the switch on/off comes from a uC.
That is why I thought about a Tri-State Buffer like CD4503BE.The switch has to be fast (>50MHz) because i need to be faster than the digital signal. But the one above and some other are all not fast enough ( Transition/propagation times are all to high >40ns).
Do you have another solution in mind?
I also tried analog switches like HEF4050, but it switches at 4.5V so i have to shift the level up of the wire. The next try will be the HCF4066BE with control input.
Another idea would be with FETs as switches like the attached picture from here
Would be glad to receive some help.
Thank you very much
I am on a project where I have to switch a wire to ground or 12V. The signal on the wire is a +-1V digital signal (rectangular with max. ~27MHz frequency) . The task is to find a switching solution to take the wire down to ground, to 12v or doing nothing ( not inteferring with the signal/ high impedance). The Control signal to turn the switch on/off comes from a uC.
That is why I thought about a Tri-State Buffer like CD4503BE.The switch has to be fast (>50MHz) because i need to be faster than the digital signal. But the one above and some other are all not fast enough ( Transition/propagation times are all to high >40ns).
Do you have another solution in mind?
I also tried analog switches like HEF4050, but it switches at 4.5V so i have to shift the level up of the wire. The next try will be the HCF4066BE with control input.
Another idea would be with FETs as switches like the attached picture from here
Would be glad to receive some help.
Thank you very much
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