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decibel voltage (dBV)

To simplify the calculation of voltage ratios and absolute voltage values, logarithmization is used and a defined reference value is used.

Absolute voltage value as a function of dBV value

Absolute voltage value as a function of dBV value

For decibelvolts (dBV), the reference value of 0 dBV corresponds to the rms value of a sinusoidal voltage of 1.0 V. This reference value has no resistance reference such as decibel milliwatt( dBm). Another voltage reference value is the Decibel Unloaded( dBu) with a reference voltage of 0.775 V. The reference voltage of 0.775 V is derived from the power of 1 mW into 600 ohms.

dBV and dBu are directly related to each other. Thus, 1 dBV corresponds to +2.2 dBu or -10 dBV corresponds to -7.8 dBu.

Englisch: decibel voltage - dBV
Updated at: 24.04.2011
#Words: 111
Links: voltage, decibel milliwatt (dBm), decibel milliwatt (dBm), decibel unloaded (dBu), power (P)
Translations: DE

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