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Decibels and Voltage

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This calculation will give you the voltage ratio, in decibels, between two signal voltages. When you want to figure out the gain needed (in decibels) to raise the output level from 0.5 volts to 1.5 volts, you can use this calculator. You can also use this to calculate how much attenuation you need, if for instance you have a 2.0 volt input level, and you have to attenuate it to 0.2 volts to prevent input overload. (You can then pop over to the H and T pad calculator to find the resistor values necessary. For the record, the formula to calculate this ratio is: Voltage Ratio in Decibels=20xlog(voltage 2/voltage 1), and you can calculate it on any scientific calculator.

Voltage number one

Voltage number two

This is the number of decibels of gain (+db) or attenuation (-dB) you need

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This information is provided with no warranty of its accuracy, or applicability, and any use made of this information is done so at the sole risk of the user.

Mc Squared System Design Group, Inc Mc Squared System Design Group, Inc
323 - 901 West 3rd Street
North Vancouver, BC V7P 3P9
Phone 604 - 986 - 8181