I am using Pololu's sharp infrared sensor board part# GP2Y0A60SZLF and I am trying to minimize the noise caused by the sensor on the voltage supply as much as possible.
I have made a filter and voltage regulator circuit as shown below, The IR sensor and the filter PCB are directly connected together. The output is carried out via a wire 7" long from the filter circuit as shown to a main PCB that has another RC filter (R2,C10) Here is the scope shot at the 6-12v supply terminal. The spikes below are 1khz, 46mv p-p.
What do you suggest to clean the supply line below?
I am also including the waveform on the sensor output.