Discussion :: Passive Filters - General Questions (Q.No.16)
|Jill Scar said: (Oct 10, 2015)|
|Why is it negative?|
|Pavithra said: (Oct 14, 2015)|
|Always the ratio is first output voltage (6) then input voltage (12) that's why it is negative.|
|Shan said: (Nov 27, 2015)|
|Wrong @Pavithra that negative due to we convert into the decibel scale.|
|Sudhir said: (Apr 11, 2016)|
|Use this formula to convert the voltages to decibels:
20 * Log (Vout / Vin) = dB.
|Shafi said: (Mar 14, 2017)|
|How to calculate decibel values without calci?
Can anyone suggest me.
|Suma said: (Jun 12, 2017)|
|Here, 20log(Vout/Vin) = 20log (6/12) = -6.02dB.|
|Sushma said: (Jun 27, 2019)|
|Please, can anyone tell how to calculate dB and why it is negative?|
|Majid Mahmood said: (Aug 19, 2019)|
|Db = 20logvout/vin so 20(log6/12) = 20 * (-0.3010) = -6.02db.|
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