adder circuit

[ramu01]

ppl,

we all know the simple opamp adder circuit. this works fine with DC sources. this works well with AC sources with freq range of 0 to 1MHz too..

but can you suggest me an efficient high speed adder circuit to instantly add two signals of freq 250 MHz ??

 

[Mikebits]

Just google High speed op amps. There are op amps that operate at 250MHz.
Here is one example.
https://www.analog.com/en/amplifier...-amps/ad8000/products/product.html#quicklinks

 

[Hero999]

Do you need any amplification?

Is some attenuation acceptable?

Is the impedance of the load constant?

You don't need an op-amp, just join the two sources together with a couply of resistors.