if i want to clamp a 10MHz, 2V p-p sinusoidal signal at +-400mV, what is the easiest way of doing this?
At the moment i am using the properties of diodes (1N4148, 0.7V volt drop), which succesfully clamp the signal @ +-0.7V. but it is stll higher than the siganl that i want (+-0.4V)
I am now thinking using some fast schottky diodes, which has got a lower voltage drop. But i do not know what other schottky diodes are availabe? (The only schottky diode that i know is 1N5819...)
I was going to ask the same question but you beat me to it.
About the diodes you could use BAT81 . . . 83 or the BAT85 which has
an even lower forward voltage drop. Other possible candidates are
1N5711 & 12 and the 5082-2300, 5082-2800 and 5082-2900.
well...that is what i observed from the output of the attenuator...it does introduce more phase shift when i compare the input and output using oscilloscope...
i suppose every components(even resistor) has got internal capacitance, and under a high frequency system (MHz range), those capacitance becomes more significant + introducing phase shift, doesn't it?
This is what i think...please correct me if m wrong!
well...that is what i observed from the output of the attenuator...it does introduce more phase shift when i compare the input and output using oscilloscope...
i suppose every components(even resistor) has got internal capacitance, and under a high frequency system (MHz range), those capacitance becomes more significant + introducing phase shift, doesn't it?
This is what i think...please correct me if m wrong!