Low voltage circuits powered by the phone line
First Claim
1. A communication system, comprising:
- phone line side circuitry configured to be coupled to phone lines;
powered side circuitry configured to be coupled to the phone line side circuitry through an isolation barrier; and
low voltage circuits in an integrated portion of the phone line side circuitry, the low voltage circuits having at least one low voltage power supply level generated from the phone line and the low voltage circuits operating at sufficiently low voltage level so as not to require low voltage drop hookswitch devices and low voltage drop diode bridge diodes to couple the integrated portion of the phone line side circuitry to the phone line.
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Accused Products
Abstract
A communication system is provided with a power supply budget such that portions of a phone line side circuit are powered from the TIP and RING phone lines while using standard electronic devices for the hookswitch circuits and the diode bridge circuit. For example, low voltage converters in the phone line side circuit are powered from the phone line. The low voltage converters operate off a low voltage power supply of approximately 2.5 V or less, more preferably operate off a low voltage power supply of approximately 2.0 V or less, and in one embodiment 1.9 V converters are utilized. In one embodiment, the communication system further includes a capacitive isolation barrier system for isolating the phone line side circuitry.
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Citations
27 Claims
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1. A communication system, comprising:
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phone line side circuitry configured to be coupled to phone lines;
powered side circuitry configured to be coupled to the phone line side circuitry through an isolation barrier; and
low voltage circuits in an integrated portion of the phone line side circuitry, the low voltage circuits having at least one low voltage power supply level generated from the phone line and the low voltage circuits operating at sufficiently low voltage level so as not to require low voltage drop hookswitch devices and low voltage drop diode bridge diodes to couple the integrated portion of the phone line side circuitry to the phone line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of providing a communication system to be coupled to a phone line, comprising:
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coupling an isolation barrier between powered circuitry and phone line side circuitry; and
operating low voltage circuits in an integrated portion of the phone line side circuitry, the low voltage circuits having a low voltage power supply level generated from power supplied from the phone line at a sufficiently low voltage level so as not to require low voltage drop hookswitch devices and low voltage drop diode bridge diodes to couple the integrated portion of the phone line side circuitry to the phone line. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. Phone line communication circuitry connectable to a phone line, comprising:
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phone line side circuitry configured to communicate with a phone line and configured to communicate with powered side circuitry through an isolation barrier; and
at least one low voltage circuit within a phone line side integrated circuit and coupled to the phone line, the low voltage circuit being a converter circuit that has at least one low voltage power supply level generated from the phone line, wherein the low voltage circuit is supplied with power through a node coupled to the phone line, the node having a voltage level of 2.5 V or less. - View Dependent Claims (18, 19, 20, 21)
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22. A method of powering at least a portion of a phone line communication circuit for use in terminating a phone line, comprising:
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providing a phone line side integrated circuit configured to communicate with a powered side integrated circuit through an isolation barrier;
coupling a low voltage circuit within the phone line side integrated circuit to at least one external device, the low voltage circuits having a low voltage power supply level;
coupling the at least one external device to TIP and RING phone lines; and
supplying a voltage from the TIP and RING phone lines to the low voltage circuit, the voltage being at a level of 2.5 V or less at an input to the low voltage circuit. - View Dependent Claims (23, 24, 25, 26, 27)
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Specification