| 摘要 |
A static relay for direct voltages. A load (Z) is energized via the collector of an output transistor (Ts) of the pnp type. The state of the relay and that of the load are detected by a first bipolar detection transistor (Tc1) having its base-emitter path, to which a base resistor (Rb) is added, connected parallel to the base-emitter path of the output transistor (Ts). A second detection transistor (Tc2) of the MOSFET type has its drain connected to the collector of the first detection transistor (Tc1) and its gate connected to the collector of the output transistor (Ts). The source electrode of the second detection transistor constitutes a detection terminal (C) which, when it is loaded by a resistor (Rc), delivers a voltage (Vc) of high level in the case of normal operation of the relay. |
