Browse Prior Art Database

Use of Triaxial Cable for Remote Sensing of Power Supplies

IP.com Disclosure Number: IPCOM000093912D
Original Publication Date: 1966-Apr-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Karner, FA: AUTHOR

Abstract

The drawing shows a method for coupling power supplies to high-speed circuitry in the nanosecond range. Triaxial cable 1 is used to minimize noise on the power supply lines caused by high-speed changes in current at load 2 which is remote from power supply 3. The power is coupled from supply 3 to load 2 by way of a suitable supply terminating impedance 4 and inner shield 5 of cable 1. Outer shield 6 provides the return path. Inner conductor 7 is employed to sense the voltage across load 2 and apply it to suitable voltage regulating apparatus within supply 3. The impedance between shields 5 and 6 is very low, e.g., 8 ohms. Therefore, noise generated by load current switching is minimized.

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Use of Triaxial Cable for Remote Sensing of Power Supplies

The drawing shows a method for coupling power supplies to high-speed circuitry in the nanosecond range. Triaxial cable 1 is used to minimize noise on the power supply lines caused by high-speed changes in current at load 2 which is remote from power supply 3. The power is coupled from supply 3 to load 2 by way of a suitable supply terminating impedance 4 and inner shield 5 of cable 1. Outer shield 6 provides the return path. Inner conductor 7 is employed to sense the voltage across load 2 and apply it to suitable voltage regulating apparatus within supply 3. The impedance between shields 5 and 6 is very low, e.g., 8 ohms. Therefore, noise generated by load current switching is minimized.

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