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公开(公告)号：JP2001186270A
公开(公告)日：2001-07-06
申请号：JP2000309803
申请日：2000-10-10
Applicant: LUCENT TECHNOLOGIES INC
Inventor： JONATHAN HERMAN FISHER , HOLLENBACH KEITH EUGENE , DONALD RAYMOND RATORERU , RENE A SMITH , TOTH MICHAEL S , ZHU WEILIN
Abstract: PROBLEM TO BE SOLVED: To provide an inexpensive and reliable digital access arrangement(DAA) which can be fed with power at least partially by an available line current provided by various countries. SOLUTION: This DAA adaptively enables an operation that is suitable as a condition guarantee by power supplied from the telephone line and meanwhile, satisfies relevant required conditions of many countries. In a line powered codec, a startup procedure for an international line powered codec uses register setting, for instance, register setting of a specified country, and the register setting is fed with power from the low voltage side (e.g. a PC or modem side) of the line powered codec and maintained. Thus, a state in which the line powered codec is programmed can be maintained even during a low line power state, so the line powered codec does not always return to a default state by resetting due to a power loss in the telephone line.
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公开(公告)号：CA2469329C
公开(公告)日：2007-08-21
申请号：CA2469329
申请日：2000-10-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FISCHER JONATHAN HERMAN , LATURELL DONALD RAYMOND , SMITH LANE A , HOLLENBACH KEITH EUGENE , TOTH MICHAEL S , ZHU WEILIN
Abstract: The present invention relates to a line powered COder/DECoder (codec). T he codec is comprised of a fine powered analog-to-digital converter and a line powered digital-to-analog converter. A DC current measurement module is provided to determine an amount of current available for use from a telephone line in an off-hook condition. The analog-to-digital converter and the digital-to-analog convert er are each adapted to be maintained in a reset condition when the DC current measuremen t module determines that insufficient current is available from the telephone line in the off-hook condition.
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Patent Agency Ranking
公开(公告)号：DE60037230T2
公开(公告)日：2008-10-09
申请号：DE60037230
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FISCHER JONATHAN HERMAN , HOLLENBACH KEITH EUGENE , LATURELL DONALD RAYMOND , SMITH LANE A , TOTH MICHAEL S , ZHU WEILIN
Abstract: A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.
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公开(公告)号：CA2469329A1
公开(公告)日：2001-04-08
申请号：CA2469329
申请日：2000-10-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： SMITH LANE A , FISCHER JONATHAN HERMAN , ZHU WEILIN , LATURELL DONALD RAYMOND , TOTH MICHAEL S , HOLLENBACH KEITH EUGENE
Abstract: The present invention relates to a line powered COder/DECoder (codec). The codec is comprised of a fine powered analog-to-digital converter and a line powered digital-to-analog converter. A DC current measurement module is provided to determine an amount of current available for use from a telephone line in an off-hook condition. The analog-to-digital converter and the digital-to-analog converter are each adapted to be maintained in a reset condition when the DC current measurement module determines that insufficient current is available from the telephone line in the off-hook condition.
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公开(公告)号：DE60037230D1
公开(公告)日：2008-01-10
申请号：DE60037230
申请日：2000-10-03
Applicant: LUCENT TECHNOLOGIES INC
Inventor： FISCHER JONATHAN HERMAN , HOLLENBACH KEITH EUGENE , LATURELL DONALD RAYMOND , SMITH LANE A , TOTH MICHAEL S , ZHU WEILIN
Abstract: A line powered data access arrangement (DAA) is disclosed which adaptively allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage device such as a charge capacitor is charged from a charge pump formed from a differential clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of an off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the first power rail or second power rail as line power conditions and on-hook/off-hook conditions warrant.
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公开(公告)号：CA2322252C
公开(公告)日：2005-04-19
申请号：CA2322252
申请日：2000-10-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： LATURELL DONALD RAYMOND , FISCHER JONATHAN HERMAN , TOTH MICHAEL S , ZHU WEILIN , SMITH LANE A , HOLLENBACH KEITH EUGENE
Abstract: A line powered data access arrangement (DAA) is disclosed which adaptive ly allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage devi ce such as a charge capacitor is charged from a charge pump formed from a differenti al clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of a n off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the firs t power rail or second power rail as line power conditions and on-hook/off-hook condition s warrant.
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公开(公告)号：CA2322252A1
公开(公告)日：2001-04-08
申请号：CA2322252
申请日：2000-10-04
Applicant: LUCENT TECHNOLOGIES INC
Inventor： HOLLENBACH KEITH EUGENE , SMITH LANE A , LATURELL DONALD RAYMOND , FISCHER JONATHAN HERMAN , TOTH MICHAEL S , ZHU WEILIN
Abstract: A line powered data access arrangement (DAA) is disclosed which adaptive ly allows proper operation with power supplied from a telephone line as conditions warrant, while at the same time satisfying the relevant requirements of many countries. In the line powered codec, a startup procedure for the international line powered codec uses register settings, e.g., country-specific register settings, which are powered and maintained from the low voltage side (e.g., from the PC or modem side) of the line powered codec. In this way, even during low line power conditions the programmed state of the line powered codec can be maintained, thus a default condition will not necessarily returned to by the line powered codec upon reset due to a power loss in the telephone line. In another aspect, a charge storage devi ce such as a charge capacitor is charged from a charge pump formed from a differenti al clock signal from the low voltage side. A current and voltage detection module in the line powered codec is always powered from the telephone line. Upon detection of a n off-hook signal or a power down condition, the current detection module determines if/when the current and voltage on the telephone line is sufficient to power certain circuits on the line powered codec. If sufficient power is not present, the line powered codec does not power up. However, the line powered codec will power up if sufficient current is detected. In another aspect, a plurality of power rails may be provided. A first power rail may be associated with the line power, a second power rail may be associated with a low voltage side power source, e.g., a charge storage device. A third (and other) power rails may be switchably connected to either the firs t power rail or second power rail as line power conditions and on-hook/off-hook condition s warrant.
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