karesz said:Hi Yang,
Do you have on both supply pins(Nr 1 & 12) the 5V please?
Does it oscillate if the output is separated_loadless?
What are your supply voltages?
The Inputs are Op-Amp like, in all cases high impedance parts...
BUT refer pls. for AD630`s data sheet:
Input ranges (Signal & Comparator!)_they has a smaller range as +/- Vs!! :-( Possible is these your problem...
K.
What do you mean? Either pin 9 shows a regular oscillator square wave, than it's a problem of AD630 operation or it doesn't, then it'sEven if connect the oscillator's output to AD630's pin 9 (carrier input), the oscillated square wave can still be detected on CRO.
It has still a buffered logic output and 15 pF isn't actually an extreme low load impedance specification. I don't expect problems from this side.The SG-3030 is an extremely low-power oscillator with quite low load capacitance ..
FvM said:What do you mean? Either pin 9 shows a regular oscillator square wave, that it's a problem of AD630 wiring or it doesn't, then it'sEven if connect the oscillator's output to AD630's pin 9 (carrier input), the oscillated square wave can still be detected on CRO.
an oscillator or loading problem.
I guess, the oscillator is operating correct, but you missed to connect pin 10 to a suitable reference voltage. Please consider, why
it can't be correct to connect it to GND.
Yes, I know. I checked the exact specification and found, that the voltage at pin 9 is allowed to swing to the positive supply (nowthese was my last sentence in the first answer
karesz said:Added after 13 minutes:
You MUSST have a reference voltage on AD630/pin10!
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