Column: Circuit drill


The operation zones of precision AC-to-DC converter circuits


By Dr Sulaiman Algharbi Alsayed, Managing Director, Smart PCB Solutions C


ircuits that convert alternating current (AC) to direct current (DC) have very wide uses, one of which is a voltage-regulated loop in control- and voltage-


compensation circuits. Tere are many varieties of these


circuits, with the most basic one shown in Figure 1. Tis circuit has a conventional layout, but its major disadvantage is not being very precise. For a 0-5V signal, this circuit can only produce a DC voltage as low as 0.08mV; see Figure 2. Its very narrow voltage output range makes it impractical for many applications.


Figure 1: A typical, simple, conventional AC-DC converter circuit


Figure 2: The narrow output voltage range generated by the converter circuit in Figure 1


08 June 2023 www.electronicsworld.co.uk


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