What are biased diode limiters?

[niyazkc]

I read that in the biased diode limiter, the diode is connected in series to a voltage Vaa. The negative of Vaa is connected to the anode of diode. Now, when ac signal is applied, when the signal is greater than Vaa in the negative region, it is cut off. Can anyone tell me why this is so?
Also please tell me what Series, Parallel, negative and positive diode limiters are? I tried to browse them in net but culdnt find anything useful.. Please direct me to any website that you might know..

 

[eramit123456]

Re: Biased diode limiter

when Applied AC Voltage will be greater than Vaa Then Diode will be in Reverse bias Condition so it will be in cut of state..

Now why diode will be in Reverse bias because when negative ac signal is Greater than Vaa so that anode is at higher voltage level than cathode.