can we use battery as power supply to reduce noise?

[memsgg]

Normally, how much noise can the battery induce? Is it lower than signal generator power supply?

Many thanks

 

[A.Anand Srinivasan]

noise is generally meritised based on the bandwidth of the output signal... if the bandwidth is very narrow then it is a good source.... so it depends just on the bandwidth of which is narrower..... signal generators with very narrow bandwidth have been designed but are costly.....

just decide based on your application....

 

[VVV]

A battery is a very clean power source, as long as the current you draw is constant. Since every battery has an internal resistance, there will be some noise associated with changing loads. But otherwise it is a very clean source. I resort to batteries whenever I suspect noise in my circuits is leaking through from the power supply.

 

[bluesmaster]

A battery can be model as tens of mOhm adn several thousand of Farads.
you can caculate the noise power.

 

[jasmin_123]

A battery can be model as tens of mOhm adn several thousand of Farads.
you can caculate the noise power.

Noise power, V^2=kT/C, does not depend on ohms.