H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 3/20 (2006.01) H04B 3/50 (2006.01) H04L 12/40 (2006.01)
Patent
CA 2727842
An active terminating device (30) for an electrical transmission line with optional line-receiving and line-driving capabilities is disclosed. The basic device is a two-terminal unit, denoted as a Signal Canceling Unit (SCU), which senses the signal available at its terminals (34a, 34b), and applies negative feedback in order to cancel and absorb the signal. When applied to the end of a transmission line (15a, 15b) as part of wired communication network, the SCU functions as a terminator. When connected in the middle of such wired transmission line, the SCU splits the transmission line into two separate and isolated segments. In such a configuration, the SCU can be used to isolate a portion of a network from signal degradation due to noise or bridge-tap. Furthermore, the two isolated segments may each employ independent communications, such that no interference exists between the segments. In another embodiment, line receiver functionality is integrated into the SCU, designated as a Signal Canceling and Receiving Unit (SCRU) (90). The SCRU can perform all the SCU functions, and also serves as a line receiver in the communication network. In yet another embodiment, line driver functionality is integrated into the SCRU, designated as a Signal Canceling, Receiving and Transmitting Unit (SCRTU) (120). The SCRTU can perform all the SCRU functions, and also serves as a line driver in the communication network. Upon connecting multiple SCRTU's to a continuous transmission line, terminated independent point-to-point communication segments are formed.
Mosaid Technologies Incorporated
Sumi Shuji
LandOfFree
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