Device for use in communication systems
AssigneeAnalog Devices, Inc.
InventorsJames Wilson, Colm Prendergast
Life of this patent
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Abstract
A first device receives and processes signals from a communication link that supports a plurality of signal protocols. The device comprises a converter, coupled to the communication link, that outputs a sampled data stream, and a digital filter that filters the sampled data stream to separate signals associated with different signal protocols. A second device receives a first input sampled data stream representative of a first signal to be transmitted and associated with a first signal protocol and a second input sampled data stream representative of a second signal to be transmitted and associated with a second signal protocol, and combines the data streams into an output data stream which may be coupled to the communication link.
Claims14
A device that receives and processes signals from a telephone line and supports a plurality of telephone signal protocols, comprising:
- a converter circuit that digitizes input signals received on the telephone line, the converter circuit providing a digital signal having components associated with the plurality of telephone signal protocols;
- and
- a digital filter circuit, coupled to the converter circuit to receive the digital signal, the digital filter circuit adapted to convert a sample rate of the digital signal, the digital filter circuit comprising:
- a first sample rate converter to convert the sample rate of the digital signal in support of a first of the plurality of the telephone signal protocols to provide a first converted digital signal;
- and
- a second sample rate converter to convert the sample rate of the digital signal by an amount that is capable of being varied during the operation of the device in response to at least one control signal to provide a second converted digital signal having a variable sample rate, the second converted digital signal associated with a second of the plurality of telephone signal protocols.
A device that processes signals to be provided over a communication link in support of a plurality of signal protocols, the device comprising:
- a first sample-rate converter that converts a sample rate of a first digital signal associated with a first protocol of the plurality of signal protocols to provide a first converted digital signal, the first sample rate converter converting the sample rate of the first digital signal by an amount that is capable of being varied during operation of the device according to at least one control signal received by the first sample-rate converter;
- a second sample-rate converter that converts a sample rate of a second digital signal associated with a second protocol of the plurality of signal protocols to provide a second converted digital signal;
- and
- a digital to analog converter configured to receive a combined digital signal formed from the first converted digital signal and the second converted digital signal and to convert the combined digital signal to a single analog signal associated with both the first protocol and the second protocol.
A device that receives and processes signals from a communication link and supports a plurality of signal protocols, comprising:
- an analog to digital (A/D) converter, coupled to the communication link, that receives an analog input signal indicative of a signal on the communication link and outputs a digital signal representative of the analog input signal, the digital signal having components associated with the plurality of signal protocols;
- and
- a digital filter, coupled to the A/D converter, the digital filter comprising:
- a first decimation filter that receives the digital signal and converts a sample rate of the digital signal by an amount that is capable of being varied during the operation of the device according to at least one control signal received by the first decimation filter to provide a first sample-rate converted digital signal having a first sample rate, the first sample-rate converted digital signal associated with a first of the plurality of protocols;
- and
- a second decimation filter that receives the digital signal and converts the sample rate of the digital signal to provide a second sample-rate converted digital signal having a second sample rate, the second sample-rate converted digital signal associated with a second of the plurality of protocols.
Dependencies are inferred from the claim text.