Electrical Engineering - Passive Filters - Discussion
Discussion Forum : Passive Filters - General Questions (Q.No. 16)
16.
At a certain frequency, the output voltage of a filter is 6 V and the input is 12 V. The voltage ratio in decibels is
Discussion:
8 comments Page 1 of 1.
Majid Mahmood said:
6 years ago
Db = 20logvout/vin so 20(log6/12) = 20 * (-0.3010) = -6.02db.
Sushma said:
6 years ago
Please, can anyone tell how to calculate dB and why it is negative?
Suma said:
8 years ago
Here, 20log(Vout/Vin) = 20log (6/12) = -6.02dB.
Shafi said:
8 years ago
How to calculate decibel values without calci?
Can anyone suggest me.
Can anyone suggest me.
Sudhir said:
9 years ago
Use this formula to convert the voltages to decibels:
20 * Log (Vout / Vin) = dB.
20 * Log (Vout / Vin) = dB.
Shan said:
10 years ago
Wrong @Pavithra that negative due to we convert into the decibel scale.
Pavithra said:
10 years ago
Always the ratio is first output voltage (6) then input voltage (12) that's why it is negative.
Jill scar said:
10 years ago
Why is it negative?
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