# rectifier circuit

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#### sumitest

Joined Mar 14, 2016
4
hello everyone,
I have made full wave bridge rectifier circuit using IN4007 diodes. As per the theory we all know if my input voltage is below the threshold of the diode it will not conduct but in my case I'm using signal from function generator if I give 4V rectifier is working very well but it is also conducting when supply is 1V only. I don't the reason pls help me out from this problem.

#### StayatHomeElectronics

Joined Sep 25, 2008
1,070
Here is a diode curve, from the AllAboutCircuits chapter on semiconductors, chapter 3.

To simplify the math we idealize the curve to show that current flow only occurs if the diode voltage, VD, is above 0.7 V. From the non-idealized graph above, we can see that current still flows when the diode voltage is below 0.7 V.

#### crutschow

Joined Mar 14, 2008
25,250
Why have you double-posted the same question?

#### Wendy

Joined Mar 24, 2008
22,155
One thread is enough and this is the wrong forum to post it.

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