| 摘要 |
<p>The power supply interface is made with a switching transistor (Tsw), which conducts the supply current Is being controlled in such a way that the voltage at the drain of the switching transistor (Tsw) is compared to the voltage at the drain of the reference transistor (Tref), featuring the known current Icg, which has an equally long but considerably narrower channel compared to the switching transistor (Tsw), while the sources and gates of these transistors are interconnected. The power supply interface according to the invention, which is designed for supply currents between 100mA and 1 A distinguishes itself by having an extremely low serial resistivity, which is as a whole applied in very precise measurements of the supply current. Except the resistor for determining current through the reference transistor, it is made completely on a uniform integrated circuit.</p> |
