| 摘要 |
A local commutator comprises a unit for control and transformation, a commutation unit, a unit for power supply and output stages, as well as said commutator comprises first, second, third, fourth, fifth and sixth connectors. The unit for control and transformation comprises a circuit for forming potential code of analog signals, channel status scan, a scale transformation circuit, signal transformation unit, "+5B" power source, a normalizing signal amplifier, a central processor, an analog-to-digital converter, a first programming connector, second programming connector, a sharpener amplifier. The central processor of the unit for control and transformation comprises a programmable integrated circuit logic and a processor. The commutation unit comprises a commutation subunit, a summing commutator of contact channels, and a scale transformation and normalizing circuit. The commutation subunit comprises first, second, third, fourth, fifth, sixth, seventh and eighth contact channel commutator. The unit for power supply and input stages comprises first, second, third and fourth regulation circuits, a reference voltage source, a circuit for shaping four-level signal, a signal amplifier, an output stage, a circuit for forming clock signals, a circuit for forming clock signals and a circuit for forming signals of parallel code. |
