Architecture for minimum loop current during ringing and caller ID
First Claim
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1. A communication system, comprising:
- phone line side circuitry for coupling to phone lines, the phone line side circuitry being configured to provide an output signal for sending data to the phone lines;
powered side circuitry for coupling to the phone line side circuitry through an isolation barrier that comprises a plurality of isolation elements, the powered side circuitry being configured to be isolated from the phone lines in order to satisfy phone line isolation regulatory standards; and
phone line side integrated ringer circuitry within the phone line side circuitry, the phone line side integrated ringer circuitry drawing substantially no loop current from the phone line during ringing condition;
wherein the powered side circuitry is configured to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor;
wherein the phone line side circuitry is configured to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals;
wherein the powered side circuitry is further configured to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements; and
wherein the powered side circuitry and the phone line side circuitry are further configured so that power is capable of being provided from the powered side circuitry to the phone line side circuitry while still maintaining the isolation required by the phone line isolation regulatory standards.
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Abstract
A communication system is provided which draws virtually no loop current during a ringing burst and only draws on-hook loop current during the caller ID field. More particularly, ringer burst circuitry may be powered from the user powered circuitry by the transmission of power across the isolation barrier rather than being powered from the phone line. Thus, loop current need not be drawn from the TIP/RING lines during ringer bursts. The isolation barrier may be a capacitive isolation barrier which allows bidirectional communication and extraction of power from signals transmitted across the barrier.
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Citations
42 Claims
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1. A communication system, comprising:
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phone line side circuitry for coupling to phone lines, the phone line side circuitry being configured to provide an output signal for sending data to the phone lines;
powered side circuitry for coupling to the phone line side circuitry through an isolation barrier that comprises a plurality of isolation elements, the powered side circuitry being configured to be isolated from the phone lines in order to satisfy phone line isolation regulatory standards; and
phone line side integrated ringer circuitry within the phone line side circuitry, the phone line side integrated ringer circuitry drawing substantially no loop current from the phone line during ringing condition;
wherein the powered side circuitry is configured to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor;
wherein the phone line side circuitry is configured to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals;
wherein the powered side circuitry is further configured to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements; and
wherein the powered side circuitry and the phone line side circuitry are further configured so that power is capable of being provided from the powered side circuitry to the phone line side circuitry while still maintaining the isolation required by the phone line isolation regulatory standards. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A communication system, comprising:
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phone line side circuitry for coupling to phone lines, the phone line side circuitry being configured to provide an output signal for sending data to the phone lines;
powered side circuitry for coupling to the phone line side circuitry through an isolation barrier that comprises a plurality of isolation elements, the powered side circuitry being configured to be isolated from the phone lines in order to satisfy phone line isolation regulatory standards; and
phone line side integrated ringer circuitry within the phone line side circuitry, the phone line side integrated ringer circuitry drawing substantially no loop current from the phone line during ringing conditions;
wherein the powered side circuitry is configured to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor;
wherein the phone line side circuitry is configured to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals;
wherein the powered side circuitry is further configured to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements, the clock signal being provided from the powered side circuitry to the phone line side circuitry through an isolation element that is separate from the first isolation capacitor and the second isolation capacitor;
wherein the powered side circuitry and the phone line side circuitry are further configured so that power is capable of being provided from the powered side circuitry to the phone line side circuitry to generate at least one power supply within the phone line side circuitry, while still maintaining the isolation required by the phone line isolation regulatory standards; and
wherein at least one of the first digital differential signal and the second digital differential signal includes both data and control information. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A method of providing a communication system for coupling to a phone line, comprising:
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coupling an isolation barrier between a powered side circuitry and a phone line side circuitry, the isolation barrier comprising a plurality of isolation elements;
configuring the powered side circuitry to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor, wherein the powered side circuitry is configured to be isolated from the phone line in order to satisfy phone line isolation regulatory standards;
configuring the phone line side circuitry to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals, the phone line side circuitry further configured to provide an output signal for sending data to the phone line;
configuring the powered side circuitry to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements;
configuring the powered side circuitry and the phone line side circuitry so that power is capable of being provided from the powered side circuitry to the phone line side circuitry while still maintaining the isolation required by the phone line isolation regulatory standards;
partitioning ringer detection circuitry into a first integrated ringer circuit within the powered side circuitry and a second integrated ringer circuit within the phone line side circuitry; and
powering the second integrated ringer circuit portion by extracting power from a signal transmitted across the isolation barrier. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A method of providing a communication system for coupling to a phone line, comprising:
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coupling an isolation barrier between a powered side circuitry and a phone line side circuitry, the isolation barrier comprising a plurality of isolation elements;
configuring the powered side circuitry to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor, wherein the powered side circuitry is configured to be isolated from the phone line in order to satisfy phone line isolation regulatory standards;
configuring the phone line side circuitry to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein at least one of the first digital differential signal and the second digital differential signal includes both data and control information and wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals, the phone line side circuitry further configured to provide an output signal for sending data to a phone line;
configuring the powered side circuitry to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements, wherein the clock signal is provided from the powered side circuitry to the phone line side circuitry through an isolation element that is separate from the first isolation capacitor and the second isolation capacitor; and
configuring the powered side circuitry and the phone line side circuitry so that power is capable of being provided from the powered side circuitry to the phone line side circuitry to generate at least one power supply within the phone line side circuitry, while still maintaining the isolation required by the phone line isolation regulatory standards, partitioning ringer detection circuitry into a first integrated ringer circuit within the powered side circuitry and a second integrated ringer circuit within the phone line side circuitry; and
powering the second integrated ringer circuit portion by extracting power from a signal transmitted across the isolation barrier. - View Dependent Claims (28, 29, 30, 31, 32)
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33. A method for providing circuitry configured to isolate powered side circuitry from a phone line through a plurality of isolation barrier elements and of operating ringer detection circuitry to detect ringing conditions on the phone line, comprising:
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configuring the powered side circuitry to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor, wherein the powered side circuitry is configured to be isolated from the phone line in order to satisfy phone line isolation regulatory standards;
configuring the phone line side circuitry to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals, the phone line side circuitry further configured to provide an output signal for sending data to the phone line;
configuring the powered side circuitry to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements;
configuring the powered side circuitry and the phone line side circuitry so that power is capable of being provided from the powered side circuitry to the phone line side circuitry while still maintaining the isolation required by the phone line isolation regulatory standards;
coupling the ringer detection circuitry to an input, the input provided for coupling to the phone line, and drawing substantially no loop current from the phone line to operate the ringer detection circuitry during ringing conditions. - View Dependent Claims (34, 35, 36, 37, 38)
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39. A method for providing circuitry configured to isolate powered side circuitry from a phone line through a plurality of isolation barrier elements and of operating ringer detection circuitry to detect ringing conditions on the phone line, comprising:
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configuring the powered side circuitry to communicate a first digital differential signal to at least two of the isolation barrier elements, the at least two isolation barrier elements comprising at least a first isolation capacitor and a second isolation capacitor, wherein the powered side circuitry is configured to be isolated from the phone line in order to satisfy phone line isolation regulatory standards;
configuring the phone line side circuitry to communicate a second digital differential signal to the first isolation capacitor and the second isolation capacitor, wherein at least one of the first digital differential signal and the second digital differential signal includes both data and control information and wherein the first and second digital differential signals are communicated across the same first and second isolation capacitors so that the first and second isolation capacitors bidirectionally transfer the first and second digital differential signals, the phone line side circuitry further configured to provide an output signal for sending data to a phone line;
configuring the powered side circuitry to provide a clock signal to the phone line side circuitry through at least one of the plurality of isolation elements, wherein the clock signal is provided from the powered side circuitry to the phone line side circuitry through an isolation element that is separate from the first isolation capacitor and the second isolation capacitor; and
configuring the powered side circuitry and the phone line side circuitry so that power is capable of being provided from the powered side circuitry to the phone line side circuitry to generate at least one power supply within the phone line side circuitry, while still maintaining the isolation required by the phone line isolation regulatory standards, coupling the ringer detection circuitry to an input, the input provided for coupling to the phone line, and drawing substantially no loop current from the phone line to operate the ringer detection circuitry during ringing conditions. - View Dependent Claims (40, 41, 42)
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Specification