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The negative swing of the output will not dip below about −0.6 V, assuming a silicon PN diode. [1] A clamper (or clamping circuit or clamp) is an electronic circuit that fixes either the positive or the negative peak excursions of a signal to a defined voltage by adding a variable positive or negative DC voltage to it. [2]
A clamper circuit is not a clipper, but the simple diode version has a similar topology to a clipper with the exception that the resistor is replaced with a capacitor. The clamper circuit fixes either the positive or negative peaks at a fixed voltage (determined by the biasing voltage) rather than clipping them off.
The negative peaks of the AC waveform are "clamped" to 0 V (actually −V F, the small forward bias voltage of the diode) by the diode, therefore the positive peaks of the output waveform are 2V pk. The peak-to-peak ripple is an enormous 2 V pk and cannot be smoothed unless the circuit is effectively turned into one of the more sophisticated ...
A diode clamp circuit can take a periodic alternating current signal that oscillates between positive and negative values, and vertically displace it such that either the positive or the negative peaks occur at a prescribed level. The clamper does not restrict the peak-to-peak excursion of the signal, it moves the whole signal up or down so as ...
The voltage v and current i variables in an electrical component must be defined according to the passive sign convention; positive conventional current is defined to enter the positive voltage terminal; this means power P flowing from the circuit into the component is defined to be positive, while power flowing from the component into the circuit is negative.
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positive to negative peak: Voltage of C 1 has dropped to 0 V by the end of the previous step, thus allowing C 3 to be charged through D 3 to 2U s. negative to positive peak: Voltage of C 2 rises to 2U s (analogously to step 2), also charging C 4 to 2U s. The output voltage (the sum of voltages of C 2 and C 4) rises until 4U s is reached.
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