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Since the rectifier conducts current only in the forward direction, any energy discharged by the capacitor will flow into the load. This results in output of a DC voltage upon which is superimposed a waveform referred to as a sawtooth wave. The sawtooth wave is a convenient linear approximation to the actual waveform, which is exponential for both charge and discharge. The crests of the sawtooth waves will be more rounded when the DC resistance of the transformer secondary is higher.
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While during the time the rectifier is conducting and the potential is higher than the charge across the capacitor, the capacitor will store energy from the transformer; when the output of the rectifier falls below the charge on the capacitor, the capacitor will discharge energy into the circuit.
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which virtually eliminates any remaining ripple voltage, and adjusts the DC voltage output very precisely to match the DC voltage required by the circuit.
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A ripple current which is 90 degrees out of phase with the ripple voltage also passes through the capacitor.
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voltage components of the output. The capacitor is often referred to as a
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is a filter circuit in which the first element is a
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79:Rectifier#Capacitor input filter
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103:Slurzberg; Osterheld (1948).
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147:Electronic filter topology
36:voltage and decreases the
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107:Essentials of Radio
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42:smoothing capacitor
84:Choke-input filter
50:voltage regulator
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113:McGraw-Hill
131:Categories
115:. p.
90:References
56:Operation
26:rectifier
22:capacitor
73:See also
38:ripple
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