Hi everyone.
Sorry, I didn't know a better tittle for this thread... but the issue is very simple.
I'm working on a plain differential amplifier, using a single OP07 and dual supply +9/-9 V (regulated).
The input is close to being a sinusoidal. The frequency is less than 500 Hz, so, pretty low.
Using a scope to look at the output, I'm getting what looks like a capacitive loading effect.
In XY mode, instead of getting a single trace, I get two (the movement is counter-clockwise).
Here's an image to show the effect. The right one is what I'm getting, even though I get a single trace (left) if probing the input voltage (R5, in this case). So, whatever is happening, is happening in the opamp section.
Y channel is the output voltage. It goes from about 0 to 2 V (so, low amplitude/low frequency here, and I doubt that slew rate could be of any concern).
Everything is soldered using short leads. No breadboarded.
Any clue? What/where could I start looking at?
Thank you!
Sorry, I didn't know a better tittle for this thread... but the issue is very simple.
I'm working on a plain differential amplifier, using a single OP07 and dual supply +9/-9 V (regulated).
The input is close to being a sinusoidal. The frequency is less than 500 Hz, so, pretty low.
Using a scope to look at the output, I'm getting what looks like a capacitive loading effect.
In XY mode, instead of getting a single trace, I get two (the movement is counter-clockwise).
Here's an image to show the effect. The right one is what I'm getting, even though I get a single trace (left) if probing the input voltage (R5, in this case). So, whatever is happening, is happening in the opamp section.
Y channel is the output voltage. It goes from about 0 to 2 V (so, low amplitude/low frequency here, and I doubt that slew rate could be of any concern).
Everything is soldered using short leads. No breadboarded.
Any clue? What/where could I start looking at?
Thank you!