What Is A Termination Resistor

- March 06, 2019

For applications where the bit time is not substantially longer than the loop time of the cable termination is crucial for minimizing reflections. Antenna cables are sometimes used for internet connections.

Rs 485 Cable Specification Guide Maxim Integrated

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April 9 2019 at 422 pm 49999 reply.

What is a termination resistor. The most basic termination networks which are known as standard termination or parallel termination networks consist of a single resistor figure 2. What do terminating resistors do in a communication network. Pins a and b are differential signal.

For example consider rs 485 network with one master board and two slave boards connected to each other with 3 pins. A resistor value is selected so that the combined sum of the termination resistor and the driver output are equal to the impedance of the trace. Used in signal transmission data radio frequency etc the termination resistor is at the end of the wire circuit.

For maximum range over long distances the ideal termination is one 120 ohm resistor at each end of the bus but this is not critical over short distances. In series termination you place the resistor near the driver to increase the impedance at the source and prevent reflections on the driver end of the trace. A can bus network must have a terminating resistor between can high and can low for it to work correctly.

Can someone please explain why terminating resistors are needed in a communication network. I hope they keep them external in this case. The terminating resistor on the bus im working on costs under 15.

I can see it being an advantage having them inside a module to protect them from the elements. And there is a ground pin. Used in fire alarm and security systems the end of line resistor is at the end of the wire circuit.

Networks that need termination. However rg 6 should not be used for 10base2 which should use rg 58 as the impedance mismatch can cause phasing problems with the baseband signal. A terminating resistor for a television coaxial cable is often in the form of a cap threaded to screw onto an f connector.