• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

3db ?

Status
Not open for further replies.

Hero999

Banned
3dB represents a fall in voltage that would result in half the power being dissipated in a resistor.

For example a 1V p-p signal dropped by 3dB would be 0.707V which would cut the power by half. An increase of 3dB would double the power so 1V would become 1.414V.
 

Sceadwian

Banned
It's not always power though, it could be decibel volts. Though not frequently used the decibel as a unit of measure has no meaning without a reference.
 
Status
Not open for further replies.

Latest threads

EE World Online Articles

Loading
Top