generate one noisy power supply

joey jiang

Prodigy 170 points

HI all,

Now I want to generate one noisy 5v power supply for my application,the noisy frequency range is about 10KHz to 3MHz.

Is there some advice or reference design? Thanks a lot.

over 6 years ago

0 Sean Xu over 6 years ago

TI__Genius 13570 points

Hi, Joey,

If you have digitally controlled power supply, you can vary the reference voltage at the rate of 10k to 3MHz, but the bandwidth of the power supply has to be very high to handle 3MHz.
Regards,
Sean

0 Ed Walker over 6 years ago

Prodigy 5 points

See this Power Tip from TI experts.
It shows how to make a noise generator for testing power supply PSRR.
The same concept could be applied to placing noise on power supply output.
e2e.ti.com/.../power-tips-simple-psrr-measurement-with-a-frequency-analyzer

Power management

Power management forum

generate one noisy power supply