Questions tagged [termination]
The matching device placed at the end of a trace that is acting as a transmission line. This termination prevent reflections from the end of the line and ensures a complete transfer of energy in the waveform into the receiving unit.
272 questions
3 votes
2 answers
398 views
Why change in impedance causes reflection of signals?
In a CAN line we use terminating resistors so that the impedance of the transmission line and the load remain same which will result in lower reflections....as the terminating resistor has a lower ...
- 493
0 votes
1 answer
90 views
CAN line termination, need, value, reasoning [duplicate]
The can line has a typical parallel termination resistors of 120ohms on the ends of the line leading to a 60ohm equivalent impedance. Why and how is the value decided to be 60 ? When i search online ...
- 493
5 votes
3 answers
815 views
Do all the nodes on the CAN line need termination resistors?
Suppose that I have 10 nodes on a CAN line should I have 120 ohms of termination on each one of them? This article of TI (link attached below) suggests that, "If the node is a stub node (...
- 493
1 vote
2 answers
174 views
Controlling CAN bus termination through microcontroller IC
Fairly new to circuit design and I am failing to see an elegant way to handle my issue. I am designing a device with an STM32 that will interface with a CAN bus. I currently have a TLP175A that I am ...
- 11
0 votes
2 answers
285 views
Which RS485 topology is this and will this work?
I have a basic awareness of RS485 protocol but this is the first time I am working with so many devices on the bus which requires a specific placement so here it goes. Will the following connection ...
1 vote
2 answers
529 views
How am I supposed to drive 50-Ohm terminated "CMOS inputs" (of AD9545 Evaluation Board)
The AD9545 Evaluation Board documentation states that the Reference Inputs (REF B/BB) are "configured for single-ended CMOS inputs" and drive the AD9545 via an "on board voltage divider&...
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1 vote
1 answer
575 views
Should the 120 ohm termination resistor in a RS-485 transmitter circuit for DMX be infront of the surge protection resistors or not?
I'm building a DMX transmitter, and follow the Texas Instruments guideline on IEC ESD, EFT, and surge resistant RS-485 circuits, having the following configuration at the moment: The MOVs clamp the ...
- 85
2 votes
3 answers
496 views
10/100 Ethernet PHY: What is this capacitor for?
10/100 Ethernet PHYs such as ENC28J60 and DM9051 recommend the following external components on each pair. What is the circled capacitor for? Any referencing or balancing that it provides would seem ...
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