Energy based pulse position detector for telephone wire networks
First Claim
1. A pulse position detector in a telephone wire network, comprising:
- an input circuit for receiving an incoming pulse signal,an integrator for integrating over time a receive signal supplied from said input circuit to produce an integrated signal representing energy of the incoming pulse signal, anda slicing circuit for producing a pulse position signal representing a position in time of the incoming pulse signal when the integrated signal reaches a threshold level.
3 Assignments
0 Petitions
Accused Products
Abstract
A system for detecting a pulse position is provided in a telephone wire network. An absolute value detector determines the absolute value of a received pulse signal supplied from a telephone wire, and produces a waveform envelope. A low-pass filter filters out high frequency components of the envelope. An integrator performs the time integration of the filtered envelope to produce an integrated waveform representing the energy of the received pulse signal. A slicing circuit determines when the integrated waveform crosses threshold level to detect the time position corresponding to the arrival time of the received pulse signal. The arrival time position is translated into a digital value representing data received form the telephone wire.
8 Citations
20 Claims
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1. A pulse position detector in a telephone wire network, comprising:
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an input circuit for receiving an incoming pulse signal, an integrator for integrating over time a receive signal supplied from said input circuit to produce an integrated signal representing energy of the incoming pulse signal, and a slicing circuit for producing a pulse position signal representing a position in time of the incoming pulse signal when the integrated signal reaches a threshold level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A telephone wire network for providing data communications over telephone line wiring in a building, comprising:
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a pulse position detector responsive to an incoming pulse supplied from the telephone line wiring for detecting position in time of said pulse and producing a digital value representing said position in time, and a media access controller responsive to said digital value for providing an addressee with incoming data, said pulse position detector including; an input circuit coupled to the telephone line wiring, an integrator for performing integration in time of a receive signal supplied from said input circuit to produce an integrated signal representing energy of said incoming pulse, a slicing circuit for producing a time indication signal when said integrated signal reaches a preset threshold level, and an output circuit responsive to said time indication signal for producing said digital value transferred to said media access controller. - View Dependent Claims (15, 16, 17, 18, 19)
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20. In a telephone wire network for providing data communications over telephone line wiring in a building, a method of detecting position in time of an incoming pulse supplied from the telephone line wiring, comprising the steps of:
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producing an envelope representing the absolute value of incoming pulse amplitude, integrating the envelope over time to produce an integrated signal proportional to energy of the incoming pulse, and detecting a position in time when the integrated signal reaches a preset threshold level to indicate a position in time corresponding to arrival of the incoming pulse.
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Specification