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#power supply

3 public questions tagged with this topic.

Rectifiers, Filters and Applications

In a rectifier with a capacitor filter, the capacitor discharges through:

**Rectifier applications** diode must have reverse breakdown voltage higher than peak inverse voltage, centre-tap transformer provides two opposite phase voltages for full-wave, capacitor discharges through load R_L when diode off, drift current in junction is minority carrier motion due to field, diffusion due to gradient, diode conducts when forward biased anode positive. The capacitor charges to the peak voltage and discharges through the load resistor ( R_L ) during the non-conducting half-cycle, smoothing the output voltage. Substituting values gives Load resistor, which matches expected

Ref: NCERT > Physics Book > Electronic Devices > Rectifiers, Filters and Applications

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Rectifiers, Filters and Applications

The ripple in a rectifier output is reduced by using:

**Capacitor filter** purpose to reduce ripple, capacitor charges to peak during diode conduction and discharges through load during non-conduction, time constant τ = R C, larger RC less ripple, ripple reduced by using capacitor or LC filter, output of half-wave without filter is pulsating half sinusoids, full-wave without filter is two half sinusoids per cycle. A capacitor filter smooths the pulsating DC output by charging during peaks and discharging during troughs, reducing AC ripples to provide a steadier DC voltage. Substituting values gives Capacitor, which matches expected behaviour for

Ref: NCERT > Physics Book > Electronic Devices > Rectifiers, Filters and Applications

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Rectifiers, Filters and Applications

The purpose of a capacitor in a rectifier circuit is to:

**Rectifier applications** diode must have reverse breakdown voltage higher than peak inverse voltage, centre-tap transformer provides two opposite phase voltages for full-wave, capacitor discharges through load R_L when diode off, drift current in junction is minority carrier motion due to field, diffusion due to gradient, diode conducts when forward biased anode positive. A capacitor in a rectifier circuit filters out AC ripples by charging to the peak voltage and discharging slowly, smoothing the pulsating output to provide a steadier DC voltage. Substituting values gives Smooth the output

Ref: NCERT > Physics Book > Electronic Devices > Rectifiers, Filters and Applications

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