What is a Terminating Resistor?
Termination resistance is an obstacle encountered in the transmission process of electronic information. When high-frequency signal is transmitted, the signal wavelength is shorter than that of the transmission line, and the signal will form a reflected wave at the end of the transmission line, which interferes with the original signal. Therefore, it is necessary to add a terminal resistance at the end of the transmission line so that the signal does not reflect after reaching the end of the transmission line. Not for low frequency signals. In long-term signal transmission, in order to avoid signal reflection and echo, it is also necessary to connect a terminal matching resistor at the receiving end. Termination resistors: resistors connected in parallel to a pair of communication lines at both ends of the line network (on the two communication ports farthest apart). According to transmission line theory, terminating resistors can absorb reflected waves on the network, effectively enhancing signal strength. The value of the two terminating resistors in parallel should be substantially equal to the characteristic impedance of the transmission line at the communication frequency.
