Dear All,
I've built a simple op amp summing amplifier using an LM358 (see attached). The circuit is used to control the electrostatic scanning plates for a charged particle beam. A saw-tooth function (1 kHz) is applied to one of the summing inputs and a DC offset is applied to the other. However, the output from the op amp has a "ripple" artifact (see attached photo's). Has anyone ever seen this before, or see anything blatantly wrong with the circuit? (I'm a physicist, not an electronic engineer, by training so please be kind!)
Cheers
I've built a simple op amp summing amplifier using an LM358 (see attached). The circuit is used to control the electrostatic scanning plates for a charged particle beam. A saw-tooth function (1 kHz) is applied to one of the summing inputs and a DC offset is applied to the other. However, the output from the op amp has a "ripple" artifact (see attached photo's). Has anyone ever seen this before, or see anything blatantly wrong with the circuit? (I'm a physicist, not an electronic engineer, by training so please be kind!)
Cheers
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