Hi everyone,
Does anyone know of any standards regarding the ripple level in power supplies' output? So far I have found none.
Related question: Is the performance of the RF receiver affected by its power supply's output ripple? I'm supplying my RF receiver with a power supply from TDK Lambda and get degraded sensitivity compared to when using a lab power supply from Tektronix, and output ripple is the probable culprit, right?
Any inputs regarding the problem is appreciated.
Thanks in advance.

 

There is no standard on how much ripple is tolerated from a power supply. Ripple can be specified as a percentage of the output voltage or as an absolute voltage.

The consequences of power supply ripple can range from none to severe. It all depends on the powered circuit and its application.

I would suggest you look at other specifications besides ripple, such as voltage and current draw.

 

Yeah of course I looked at the voltage and current draw and they are all within specification of the RF receiver. That is why ripple is the likeliest cause for the bad sensitivity. It works fine with the lab power supply which has only 5mVp-p ripple.
But still, there is no standards on it, which is confusing to design and/or choose to buy a suitable power supply.

 

It might easily be something like the level of radio interference emitted from the power supply at the frequencies in which you are interested. There are maximum limits but some products have lover levels than others and the spectrum is not uniform, so maybe the TDK just transmits a little more noise than the Tektronixs.