Active decoupling and power management circuit for line-powered ringing generator
AssigneeAdtran, Inc.
InventorsSteven M. Robinson, Jeffrey K. Taylor, John B. Wilkes, Jr., John S. McGary
Life of this patent
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Abstract
A ringing voltage power management circuit is configured to extract an isolated high-value intermediate voltage from a central office powered digital subscriber line through a current limiting circuit, and to charge a storage capacitor that serves as an energy reservoir for the ring generator of a subscriber line circuit. The storage capacitor and the current limiting circuit isolate the peak power drawn by the ringing load from the telephone line and translate the ringing signal's (20 Hz) ripple to the sub-Hz oscillations of the ringing cadence.
Claims20
A method of supplying power to a ring generator for a telecommunication device, comprising the steps of:
- (a) coupling said telecommunication device to a telecommunication link that conveys telecommunication signals to and from, and is remotely powered by, a telecommunication facility, wherein instantaneous power supplied from said remotely powered telecommunication link is less than a total power requirement of said telecommunication device and said ring generator during operation of said ring generator;
- (b) during intervals other than powering of said ring generator, storing electrical energy from said remotely powered telecommunication link;
- and
- (c) during intervals of powering said ring generator, using electrical energy stored in step (b) to augment power supplied from said telecommunication link and realize said total power requirement for ringing operation of said ring generator and operating said telecommunication device without exceeding maximum power available from said telecommunication link.
A circuit for powering a ring generator for a telecommunication device using power extracted from a telecommunication link that conveys telecommunication signals and is remotely powered by way of a telecommunication facility, wherein instantaneous power supplied from said remotely powered telecommunication link is less than a total power requirement of said telecommunication device and said ring generator during operation of said ring generator, said circuit comprising
- an electrical storage device;
- and
- an interface circuit coupled in circuit with said telecommunication link and said electrical storage device, and with said electrical storage device and said ring generator, and being operative, during intervals other than powering of said ring generator, to store in said electrical storage device electrical energy derived from said remotely powered telecommunication link and, during intervals of powering said ring generator, to use electrical energy stored in said electrical storage device to augment power supplied from said telecommunication link and realize said total power requirement for ringing operation of said ring generator and operating said telecommunication device without exceeding maximum power available from said telecommunication link.
A remote terminal circuit for powering a ring generator for a telecommunication device using power extracted from a telecommunication link that conveys telecommunication signals and is remotely powered by way of a telecommunication facility, wherein instantaneous power supplied from said remotely powered telecommunication link is less than a total power requirement of said telecommunication device and said ring generator during operation of said ring generator, said circuit comprising an electrical storage device, and an interface circuit coupled in circuit with said telecommunication link and said electrical storage device, and in circuit with said electrical storage device and said ring generator, and being operative, during intervals other than powering of said ring generator, to store in said electrical storage device electrical energy derived from said remotely powered telecommunication link and, during intervals of powering said ring generator, to use electrical energy stored in said electrical storage device to augment power supplied from said telecommunication link and realize said total power requirement for ringing operation of said ring generator and operating said telecommunication device without exceeding maximum power available from said telecommunication link, while decoupling low frequency ripple noise associated with operation of said ring generator from said telecommunication link, so as not to interfere with digital telecommunication signals conveyed over said remotely powered telecommunication link.
Dependencies are inferred from the claim text.