Control circuit for a solid state telephone line circuit

Details Control circuit for a solid state telephone line circuit Control circuit for a solid state telephone line circuit

H - Electricity

04

M

379/67

H04M 7/00 (2006.01)

Patent

CA 2029140

A CONTROL CIRCUIT FOR A SOLID STATE TELEPHONE LINE CIRCUIT ABSTRACT A control circuit for a solid state line circuit is disclosed that includes, in combination, a logic interface circuit connected to a central controller. The logic interface circuit receives and stores digital data representing commands from the central controller and transmits status signals from the control circuit to the central controller. A DC loop control circuit provides loop control voltage to the interface circuit which adjusts the loop current fed to a subscriber loop. A loop sense comparator receives a representation of the subscriber loop voltage and compares the loop voltage to a threshold. When the threshold is exceeded, the loop sense comparator transmits to the logic interface a status signal. A ring trip circuit monitors the subscriber loop and transmits to the logic interface a status signal representing an interruption in ringing current applied to the subscriber loop. An AC summing amplifier, amplifies voice signals transmitted on the subscriber loop and subtracts from the transmit voice signals, a receive voice component. A switched capacitor filter, under control of the logic interface, provides either loaded or non-loaded network line balance operation. The switched capacitor filter also receives a receive voice signal which it is uses to generate the subtraction signal used by the AC summing amplifier.

Affiliated with

Also associated with

Rating

Control circuit for a solid state telephone line circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control circuit for a solid state telephone line circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control circuit for a solid state telephone line circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1917782