| 摘要 |
<p>A circuit (1) for the linear measurement of a current (IL) flowing through a load (RL) comprises a current sensor consisting of a resistor (RN), and a first driver transistor (M1) connected to the load and a second transistor connected to the resistor (RN), either transistors (M1,M2) being field effect transistors interconnected into a current mirror configuration. This circuit (1), whereto the second transistor (M2) is integrated with an area which is n times smaller than that of the first transistor (M1), further comprises an operational amplifier (A1) having its inputs respectively connected to the drain electrodes (D1,D2) of the first and second transistors (M1,M2) to regulate the drain-source voltage (VDS) of the transistors (M1,M2) and enable linear measurement of the load current (IL) irrespective of the operating temperature.</p> |
