Hi i need a square input for my digital input application from function generator but a voltage of 150V and frequency of 35kHz .. our module accepts only digital input .. kindly help me with an interface circuit between function generator and module
150V is the input range to my module needed to test. It has a range from 15-150V.
If 15-150v is input then nodule read as 1 else 0.
Input shal be given frm function generator as it has a capacity to vary frequency.
Frequency is variable from1k to 35k
Duty cyle 50% would be enough
Rise and fall times should be as minimum as possible. Its just like i can test with function generator but it does not support enough voltage to test..
Sadly you don't give the expected output voltage levels, and you don't give information about your power supplies voltages.
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You have two options:
* either calculate the voltage divider that 150V input gives output in the range of your comparator's input voltage range (which usually depends on supply voltage)
* or you focus on the 15V switching level and use a limiter (zener diode...) to limit the output voltage at higher input voltages.
The first one has the benefit that you easily can adjust threshold level,
The second one gives a more precise threshold level.
Klaus
Added:
Rise and fall times should be as minimum as possible