This company has them. They're expensive.
http://eportal.apexmicrotech.com/mainsite/index.asp
http://eportal.apexmicrotech.com/mainsite/index.asp
Everyone seems to be assuming that you mean 60 to 140 V power supply. But you said input. So I will assume that you really meant input.Hi
I really need help on this thing. i need and opamp that will not burn or get spoiled by giving it a high voltage input. like 60 to 140 v input.
What you need to do is use a voltage divider before the input of the opamp. A 10:1 divider will reduce the voltage to 6 to 14 V which is within the range of most opamps. Your power supply should be a few more volts than the maximum input voltage. Of course, your output voltage will also be limited by the power supply voltage, but since you didn't mention a specific required voltage, we can only assume that you don't need anything special.
peranders said:One solution is this
Dear PerAnders,
Me thinks Mark Alexander's IGBT amplifier is not a pretty easy solution.
What kind of input is it and what is the load (output), how much power?illum said:basically i need something that will amplify a signal less then 15V and reduce the voltage of signal with voltage more then 40V
illum said:it basically is a telephone signal. when simple voice is transmitted the voltage is low but when a ring signal is suppose to be passed the voltage is between 40 - 160. so i need to reduce this voltage with out disrupting the normal voice signals.
Can't you just clamp it with zeners or something similar....
illum said:it basically is a telephone signal. when simple voice is transmitted the voltage is low but when a ring signal is suppose to be passed the voltage is between 40 - 160. so i need to reduce this voltage with out disrupting the normal voice signals.
Abey Saaley, kiya kar raha hai phone key saath?
Jacco me thinks this guy is doing something "interesting"... especially if he is between the age group of 15-25 Seen a lot of that. Me also hypothesizes he blew whatever he had working when the tel rang.....
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