Browse Prior Art Database

SIMULTANEOUS EMI, SURGE, AND OVERVOLTAGE PROTECTION CIRCUIT

IP.com Disclosure Number: IPCOM000006288D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2001-Dec-20
Document File: 1 page(s) / 62K

Publishing Venue

Motorola

Related People

Authors:
J. M. Dwyer B. A. Snodgrass A. E. Cook

Abstract

Figure 1 illustrates a circuit providing simultaneous EMI, surge, and over-voltage protection circuit 19 which meets three overlapping requirements for secure tele- phone communication equipment. This circuit provides a common lead for protection between multiple signal line pairs without affecting normal circuit operation and can operate without connection to earth ground for use in common mode applications.