Why Does Negative Sinusoid Remain in Positive Diode Clipping Circuit Across Diode?

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#1 21676237 22 Jul 2016 11:41

Andy Lee Andy Lee

Anonymous

Post #1
21676237 22 Jul 2016 11:41

Hello,

Why the negative portion of a sinusoid still exist in a Positive Diode Clipping circuit (voltage measurement across diode)?
http://www.electronics-tutorials.ws/diode/diode-clipping-circuits.html

Was expecting only 0.7v to exist for the diode operational voltage

thanks
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#2 21676238 22 Jul 2016 18:47

Kevin Angelo Ma Kevin Angelo Ma

Anonymous

Post #2
21676238 22 Jul 2016 18:47

I think its explained in the reference you shared.
"During the negative half cycle, the diode is reverse biased (cathode more positive than anode) blocking current flow through itself and as a result has no effect on the negative half of the sinusoidal voltage which passes to the load unaltered. Then the diode limits the positive half of the input waveform and is known as a positive clipper circuit."
#3 21676239 23 Jul 2016 05:44

Andy Lee Andy Lee

Anonymous

Post #3
21676239 23 Jul 2016 05:44

I see now. In my head, I was thinking the clipping need to occur at the source. Which would required the placement of the diode and resistor to swap. If they swap, would the circuit still consider a clipping circuit?
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Why Does Negative Sinusoid Remain in Positive Diode Clipping Circuit Across Diode?

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