| US 7,478,029 B1 | ||
| Cable simulation device and method | ||
| Daniel M. Joffe, Owens Crossroads, Ala. (US) | ||
| Assigned to Adtran, Inc., Huntsville, Ala. (US) | ||
| Filed on Nov. 03, 2004, as Appl. No. 10/980,066. | ||
| Int. Cl. G06F 17/50 (2006.01) | ||
| U.S. Cl. 703—15 [703/14; 716/5] | 22 Claims |
| 1. A cable simulator, comprising:
a first port;
a second port; and
a circuit coupled to the first and second ports, the circuit configured to attenuate a common mode component and a differential
mode component of a communication signal received by the first port such that the circuit simulates transmission of the communication
signal through a transmission line, the circuit further configured to transmit the communication signal to the second port,
wherein the circuit is configured to attenuate the common mode component via circuit components that model a tip-to-ground
capacitance and a ring-to-ground capacitance of the transmission line.
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