Assume I have an input voltage ranging from 5-10 MHz and want to amplify it.
The case is pretty simple as any device as FET,BJT or high frequency op-amp can do the amplification well but I have a problem: the input frequency range (amplitude) changes by the frequency as it is 2.5 volt pk-pk at 5MHz and reduces to 5 milli volts pk-pk at 10 MHz.
I need a constant output amplitude ( at any voltage ).
I tried a high-pass filter to reduce the high range at lower frequencies but unfortunately it is not that precise and some changes remains ( even with good frequency calculations and active filters) and some distortion at extremities noticed.
Is there any standard way to do that?
Any helps appreciated in advance.
Electronic – How to control the gain of FET/BJT/Op-Amp amplifier by input voltage range
amplifierbjtfetgainoperational-amplifier
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Best Answer
Adding as an answer because comment dialog became too long:
Yes, an XO works fine as a clock source. See the first application schematic in the datasheet:
Also see this answer to another question, for more discussion on DDS ICs and sine wave generation.