Here you can see the configuration in customer system. There are three diff. line are connected in paralle. Is there possible impedance matching issue?
The A/B/C TTL signal are indepentant.
application: AC inverter
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Here you can see the configuration in customer system. There are three diff. line are connected in paralle. Is there possible impedance matching issue?
The A/B/C TTL signal are indepentant.
application: AC inverter
The termination resistor should match the characteristic impedance of the transmission line. As far as I can see, this is still the case.
When multiple drivers output the same signal, the voltage drop over the termination resistor will be larger (N × 350 mV). This is not a problem.
When multiple drivers output different signals, it is not really defined what happens, and you might exceed the output short circuit current limit of the drivers. But the receiver will not be damaged.
I do not understand what the purpose of this circuit might be. It is not possible to combine multiple differential signals this way. Is the intention to have AND or OR logic, or are all transmitters except one disabled?
Hello Brian,
Additional information will help us here. Is the customer trying to increased the current drive by tying all the inputs together? or is it possible they are trying to implement some sort of muxing feature with the enable/disable pins?
Regards,
Josh