| 摘要 |
The invention relates to devices with composite chains and afferent logic, meant for optimal control of peripheral devices and can be used in physical property remote displaying systems.The telephone line interface controller (1) contains a protection unit (3), consisting of an overvoltage protection element (7) and a rectifier bridge (8), connected in parallel to the telephone line; a switching unit (4), containing two MOSFET transistors (T1, T2), a Zener diode (12), three resistors (R1, R2, R3) and a capacitor (11); a voltage divider (5) consisting of two resistors (R4, R5); a programmable microcontroller (2) with input and output terminals.
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