Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Circuit to detect the hook status and ringing at the CPE end of a telephone network

Circuit to detect the hook status and ringing at the CPE end of a telephone network

US Patent 5347575 · Granted Sep 13, 1994

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Reduced power consumption multiplexer using self-decoding power down logic2003
Current source and method therefor2000
Video conference system with ATM cell reuse1999
Enhanced subscriber line interface circuit1994
Enhanced subscriber line interface circuit1994
Hybrid balance and combination codec filter circuit1993
Hybrid balance and combination codec filter circuit1993
Enhanced high voltage line interface circuit1992
Enhanced high voltage line interface circuit1992
Thermal protection circuit for an integrated circuit subscriber line interface1991
Circuit for synthesizing an impedance across the tip and ring leads of a telepho1990
Digital switching system with two-directional addressing rams1988