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ramu
07-31-2008, 10:28 AM
ppl

we all know the simple opamp adder circuit.. this works fine for dc sources. this even works for ac of freq range 0 to some 1MHz..

but i need a high speed adder to instantly add two signals of freq range 250 to 300 MHz .. can you suggest me one such circuit ?

ashish_agarwal123456
07-31-2008, 08:29 PM
below are some suggestion.... i have never tried any........ they just came in my mind....... hope they work.....
why don't you check out high frequency opamps like HA2839/40
they say to work upto 600MHz............
other solution can be to first convert the signal to low frequency, add, then again upconvert ..........
or you can make a adder circuit using high frequency transistors....... just replace all the transistors in a opamp circuit by them.....

you can also try them for your other querry.....

coolmanpavi
08-03-2008, 05:15 PM
doing it with transistors instead of opamps will help