Double voltage level compatible receiving remote control command interface circuit for satellite
A technology for remote control commands and interface circuits, applied in the field of electronic circuits, can solve problems such as large size and complex circuits, and achieve the effects of small size, good availability, and reduced complexity.
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[0018] The present invention provides an interface circuit that can receive two command levels at the same time, and its composition principle is as follows: figure 2 shown, including:
[0019] The high-voltage command and low-voltage command logic "OR" circuit composed of isolation diodes (V1, V2, V3, V4), resistor divider circuit (R2, R4), relay (K1) and its coil protection circuit (a group of R1 and Z1, A group of R3 and Z2), wherein, the isolation diode is serially connected to the command interface circuit, which plays the role of isolation protection for the command receiving circuit. The resistor divider circuit is to divide the input high-voltage command signal (indicated by A in the figure), so that the steady-state voltage actually accepted by the relay is less than its maximum input voltage, and the low-voltage command signal (indicated by B in the figure) is directly applied at both ends of the relay coil. The part of the relay that receives the command is the r...
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