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Clamping circuit for electromagnetic wave

by r_rajesh77
Tags: circuit, clamping, electromagnetic, wave
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r_rajesh77
#1
Nov25-11, 06:57 AM
P: 3
Hi,
Im looking for clamping circuit for electromagnetic waves. I have a wave which has amplitude of 5 and -10. is it possible to clamp it to 1 and 0 respectively. I want a positive side clamp to be +1 units and negative side clamp to be 0 units. is it possible to realize using any electromagnetic wave devices like waveguide or so.
Thanks,
Rajesh
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sophiecentaur
#2
Nov25-11, 09:42 AM
Sci Advisor
Thanks
PF Gold
sophiecentaur's Avatar
P: 12,163
What frequency do you want this to operate on?
For manageable frequencies, AC coupling, followed by a diode connected to Earth (Anode to earth) would limit the negative excursion to -0.7V (less with an appropriate diode) and the positive excursion to 15V (in your example?). You can then use an appropriate resistive divider (or transformer) to reduce the positive value to what you want.

Is this too simplistic a solution? Only, at higher frequencies, signals tend to be AC coupled and do not need to be clamped.
r_rajesh77
#3
Nov25-11, 10:50 AM
P: 3
Hi sophiecentaur, thanks for the reply. im looking for using microwave. i have an additional requirement. the positive voltage is not fixed at 15v. it can be a variable. in that case what circuit can be used.
Thanks,
Rajesh

sophiecentaur
#4
Nov25-11, 10:55 AM
Sci Advisor
Thanks
PF Gold
sophiecentaur's Avatar
P: 12,163
Clamping circuit for electromagnetic wave

I have to ask why you need your microwave signal to have a DC component???
r_rajesh77
#5
Nov25-11, 11:09 AM
P: 3
I was trying to create a comparator circuit and I end up in this scenario. I prefer not to use diodes or transistor, but i can definitely go with resistor divider. my requirement is the signal should clamp to some thing like unit step function. here i'm. looking for solutions.


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