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Author Topic: help in designing high frequency controlled signal+amplifier+vrms  (Read 818 times)
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i'm more programmer, so I will be glade if you can help me
the design involve amplification of 10Mhz sinus and measure the vrms output for that

arduino digital --> signal generator module --> amplifier -->  RMS detector --> arduino  ADC
                                                                    ---------------------------------------------> ultrasound ceramic

1) signal generator module is AD9850 DDS signal generator module like this
as I understand it is only frequency controlled and not amplitude controlled (if I wrong please tell me)
to control amplitude I tought using Digital Potentiometer like this one
is it going to work? any other thoughts?
how to connect it right?

2) amplifier is big box laying in our lab
the goal is to replace it to some thing small linear in the range 9-12 MHZ (more or less) with fix 20 gain (or controlled) giving
max output of 60 V p-p
any suggestion how to connect what we have to the signal generator?
where to look for new amplifier?

3) I found this RMS detector "ADL5511:  DC to 6 GHz Envelope and TruPwr RMS Detector"
and planing to use it evaluation board
does arduino can support the power request of 5 V/100 mA power supply?
how can I reduce the high frequency 60 V p-p to RFIN (RFIN AC-Coupled) 5.6 V p-p of this device (Parnell to output ceramic)?
can it be done only with resistors?
how to connect it vrms output to the arduino ?

any other questions I should ask my self?



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