Column: Circuit drill


Figure 2: Circuit input resistance vs power supply voltage


shows higher and lower resistances. I also noticed that the curve in Figure 2 shows a linear relationship between the power supply voltage and circuit resistance changes, at a linear ratio of about 82.3Ω/Vdc. T is means that the resistance multiplier circuit in Figure 1 doesn’t


provide a constant resistance multiplication ratio per the commonly-used equation Rin


= R1 * (1 + R3/R2). From the above, a new equation emerges: Rin = 82.3 * R1 * (1 + R3/R2). T is


equation describes the resistance multiplier performance more accurately.


T e experiment and its fi ndings are


signifi cant for circuit designers, considering this circuit’s wide implementation. Understanding the impact of the power supply voltages on circuit performance is crucial, allowing the building of more accurate circuits.


11 – 13.6.2024 NUREMBERG, GERMANY


DIVE INTO THE WORLD OF POWER ELECTRONICS


Be part of the industry’s leading exhibition and discover cutting-edge trends along the entire value chain at firsthand.


Find out more: pcim-europe.com/visitors


Get your ticket now


Messe Frankfurt Group


www.electronicsworld.co.uk April 2024 09


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44