Output stage of Signal generatro

hi,

I want to design a sine wave signal generator with the following spes.

Frequency 10KHz-25MHz
Output level ±25 at 500ohm load

I want to use DDS like AD9954 etc.

The issue is in the amplification of the signal. I have found this circuit and want to change it according to my spec.

kindly explain the output stage of the circuit.

Is it possible to output level to ±25v while using the same op-amp LM7171 as it is specified for ±15V operation?

Hi,

Simple answer: NO.

Klaus

Thanks for reply

What type of amplifier is used in rf signal generators at output stage?

you need to find an op amp that can run off of at least +/- 30 volt supply rails, and that has a gain of at least 10 at 25 MHz. Digikey will have a lookup search function to find such a thing.

Thanks for reply.

Why we can't use different voltage levels for op-amp and the output stage?

Is it possible to use rf push pull amplifier?

There is an example "PD85004_PP_PA_II".

because the output of an Op-amp is limited by its supply voltage