Question

2. State the need of filters in a regulated DC power supply
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Answer 1

The purpose of power supply filters is to smooth out the ripple contained in the pulses of DC obtained from the rectifier circuit while increasing the average output voltage or current. Filter circuits used in power supplies are of two general types: Capacitor input and Choke input.

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Answer 2

State the need of filters in a regulated DC power supply.

• The waveform must be filtered in order to use it in most devices that need a DC input so that the output voltage is kept as constant as possible, especially in circuits where a ripple frequency could impair device performance.
• The fundamental components of a regulated DC power supply are a step-down transformer, rectifier, DC filter, and regulator. The presence of an AC component is indicated by the ripple in the signal. To attain pure dc output, this ac component must be entirely removed. Thus, a circuit is required to convert the rectified output into a pure dc signal.
• One is to stop the switching source's electromagnetic interference from entering the power line and impacting other devices. The input filter's secondary function is to stop high frequency voltage from the power line from going through the power supply's output.
• Its job is to provide a circuit or device that must operate within specific power supply parameters with a stable voltage (or, less frequently, current). The output from the regulated power source is mostly always DC but can also be alternating or unidirectional (direct current).

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