| 摘要 |
The device comprises (a) an external impedance (Rext) connected up between a voltage source (E) for powering the circuit and a pin (4) connected to a high-impedance input (3) of the logic part of this circuit, (b) a branch of the analogue circuit, connected up between this pin (4) and the earth of the circuit, and (c) a circuit (5) transmitting logic signals and connected up to this pin (4) by a logic output (6) which offers a high impedance in one of its two logic states, a specified current being established in the said pin when the said output is in the high-impedance state. Application to the limitation, regulation, directing or measuring of the current in a load outside the integrated circuit.
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