Circuits

Introduction

Digital devices are use by almost everyone in the U.K. on a daily basis and these devices require a DC voltage. Such devices include computers, radios and televisions. However the electricity genic into homes is AC, which is fine for some appliances but not for digital devices. indeed to power these devices the AC mains must be transformed to DC and the voltage must be stepped down as the rated 230V of the mains ordain damage most digital circuitry.

DCPS
To achieve this DC causality Supply (DCPS) is used. It works by taking an AC infix into the primary side of a transformer and steeping it down to stimulate an AC output of lower voltage. The number of turns of the transformer will depend on how low the output voltage should be. Then this voltage is passed by dint of what is called a Rectifier Circuit. This will manipulate the AC voltage and convert it into a DC voltage. Then it fucking be used to power digital devices. In many DCPS circuits, a regulator is generally employed to maintain the output voltage at a fixed level regardless of input prognosticate and load variations [1]

A diagram of this process is shown below
A unidimensional DC Power Supply [1]
SMPS
Most modern systems however use Switched-Mode Power Supplies (SMPS) as they are smaller and oftentimes more efficient than DCPS systems.



[1] An AC/DC SMPS consists of a rectifier and drip circuit which will produce a rough dc output. Then whats called a Chopper Circuit (Switching Circuit) will chop the DC at a high frequency (usually greater than 20khz) to produce a square wave. [1]
Next a power transformer is placed and the output of it passed through a rectifier to produce a smooth unregulated DC output. [1] Transformers can be made to be smaller when they are operating at high frequencies, therefore the higher the frequency of the chopper, the smaller the transformer that is necessary and so the size of the power supply can be reduced. [1] This means that a higher frequency chopper can save...If you want to get a full essay, order it on our website: Ordercustompaper.com



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