The circuit presented here is a high-frequency differential line receiver amplifier that has excellent common-mode rejection at its inputs. The project is an ideal solution for a receiver of digital signal or video signals that are transmitted over long distances on twisted-pair cables like CAT5. Category 5 cables are very common in office settings and are extensively used for data transmission. These cables can also be used for the digital signal or analog transmission of signals such as video. These long cables pick up noise from the environment they pass through. This noise does not favor one conductor over another and therefore is a common-mode signal. A receiver that rejects the common-mode signal on the cable can greatly enhance the signal-to-noise ratio performance of the link. This project is tested with 100Hz to 1Mhz square wave signal, however, it can support higher frequencies.
more information: https://www.electronics-lab.com/project/balanced-line-receiver-for-digital-signal-over-twisted-pair-cat-5-cable/
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