Integrated modem and line-isolation circuitry with data flow control and associated method
First Claim
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1. An integrated modem and line-isolation circuit, comprising:
- system-side line-isolation circuitry capable of being coupled to an external device and to an isolation barrier to communicate digital information through the isolation barrier for ultimate communication with a phone line;
digital signal processing (DSP) circuitry integrated with the system-side line-isolation circuitry on the same integrated circuit, the DSP circuitry having a modem processor for modem data and a digital processor for system-side circuitry, the modem processor being configured to generate modem processed data as an output for the external device;
isolation interface circuitry within the system-side line-isolation circuitry adapted to be coupled to the isolation barrier to provide an interface through which digital information is sent to and received from the isolation barrier;
an analog input within the integrated circuit configured to receive an external analog input signal representative of voice information; and
digital path control circuitry within the integrated circuit coupled to the analog input through an analog-to-digital converter, coupled to the isolation interface through the isolation interface circuitry and coupled to the DSP circuitry, the digital path control circuitry having a control signal as an input that determines how digital data flows within the integrated circuit between the analog input, the isolation interface and the DSP circuitry, the digital path control circuitry thereby providing a plurality of selectable modes of operation for the integrated circuit based upon the input control signal.
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Abstract
An improved modem architecture and associated method are disclosed that integrate modem functionality and line-side isolation functionality while also providing flow control of internal data between an isolation interface, digital-signal-processor (DSP) circuitry, and an analog input. The integrated modem and line-isolation circuit may also have an analog output for which data flow control is also provided.
35 Citations
30 Claims
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1. An integrated modem and line-isolation circuit, comprising:
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system-side line-isolation circuitry capable of being coupled to an external device and to an isolation barrier to communicate digital information through the isolation barrier for ultimate communication with a phone line;
digital signal processing (DSP) circuitry integrated with the system-side line-isolation circuitry on the same integrated circuit, the DSP circuitry having a modem processor for modem data and a digital processor for system-side circuitry, the modem processor being configured to generate modem processed data as an output for the external device;
isolation interface circuitry within the system-side line-isolation circuitry adapted to be coupled to the isolation barrier to provide an interface through which digital information is sent to and received from the isolation barrier;
an analog input within the integrated circuit configured to receive an external analog input signal representative of voice information; and
digital path control circuitry within the integrated circuit coupled to the analog input through an analog-to-digital converter, coupled to the isolation interface through the isolation interface circuitry and coupled to the DSP circuitry, the digital path control circuitry having a control signal as an input that determines how digital data flows within the integrated circuit between the analog input, the isolation interface and the DSP circuitry, the digital path control circuitry thereby providing a plurality of selectable modes of operation for the integrated circuit based upon the input control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for controlling data flow in an integrated modem and line-isolation circuit, comprising:
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providing a system-side line-isolation integrated circuit including digital-signal-processing (DSP) circuitry having a modem processor for modem data and a digital processor for system-side circuitry, the modem processor being configured to generate modem processed data as an output for an external device;
providing isolation interface circuitry within the system-side line-isolation circuitry adapted to be coupled to an isolation barrier to provide an interface through which digital information is sent to and received from the isolation barrier for ultimate communication with a phone line;
providing an analog input within the integrated circuit coupled to an analog-to-digital converter and configured to receive an external analog input signal representative of voice information; and
controlling the flow of data between the analog input, the isolation interface and the DSP circuitry to provide a plurality of selectable modes of operation for the integrated circuit based upon an input control signal. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification