Lane Lee Smith

US Patent:

6389110, May 14, 2002

Filed:

Jun 13, 2000

Appl. No.:

09/592864

Inventors:

Jonathan H. Fischer - Blandon PA
Donald R. Laturell - Allentown PA
Lane A. Smith - Easton PA

Assignee:

Agere Systems Guardian Corp. - Orlando FL

International Classification:

H04M 124

US Classification:

379 104, 379 2202, 379 30, 324520

Abstract:

Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an inexpensive tuned circuit such as a ceramic resonator forms a telecom service resonator ID device which is placed across a telephone line, either at the central office or at the customer premises. Injection of a test current at a predetermined frequency, and a suitable amplitude of the same indicates to the technician aspects of telecom service to that particular telephone line (e. g. , the existence of POTS, ISDN, and/or xDSL) and or use of the telephone line by a home network such as HPNA. In another embodiment, a telecom service transponder ID device is formed to provide line service identification to an interrogating line technician. The telecom service transponder ID device is activated when the test signal including an appropriate frequency is present to cause excitation in the telecom service transponder ID device. The resonator and transponder devices preferably have very high impedances at all frequencies except at the desired resonant frequency, and thus avoids violation of telephone service standards.

US Patent:

6404780, Jun 11, 2002

Filed:

Dec 23, 1998

Appl. No.:

09/219775

Inventors:

Donald Raymond Laturell - Allentown PA
Lane A. Smith - Easton PA
Tony S. El-kik - Allentown PA

Assignee:

Agere Systems Guardian Corp. - Orlando FL

International Classification:

H04J 306

US Classification:

370510, 370514, 370498, 375365

Abstract:

The present invention provides a synchronizing data protocol comprising one or more serial input-output (SIO) control word(s) and data passed across a high voltage interface, to allow the elimination of a frame synchronization signal (and corresponding AC coupling capacitors). The present invention has particular applicability to, e. g. , time division multiplexed (TDM) data, serial data communication devices, or synchronous serial communication interfaces in general, and to the communication between a controller and a codec in an audio codec device in accordance with the AC 97 Specification, i. e. , the AC Link. The synchronizing data protocol is implemented over a transmit data signal line to provide occasional synchronization (i. e. , not frame-by-frame synchronization) between the two communicating devices. The master device includes a preamble insertion module to insert a predetermined preamble code word into the transmitted data stream.

US Patent:

6466650, Oct 15, 2002

Filed:

Jun 13, 2000

Appl. No.:

09/592863

Inventors:

Jonathan H. Fischer - Blandon PA
Donald R. Laturell - Allentown PA
Lane A. Smith - Easton PA

Assignee:

Agere Systems Guardian Corp. - Orlando FL

International Classification:

H04M 124

US Classification:

379 2701, 379 2202, 379 2703, 379 2901, 379 2903, 379 31, 324520, 3405721

Abstract:

Telephone line service type identification is provided to a telephone technician in the field by the placement of one or more tuned circuit(s) across the telephone line. In one embodiment, an inexpensive tuned circuit such as a ceramic resonator forms a telecom service resonator ID device which is placed across a telephone line, either at the central office or at the customer premises. Injection of a test current at a predetermined frequency, and a suitable amplitude of the same indicates to the technician aspects of telecom service to that particular telephone line (e. g. , the existence of POTS, ISDN, and/or xDSL) and or use of the telephone line by a home network such as HPNA. In another embodiment, a telecom service transponder ID device is formed to provide line service identification to an interrogating line technician. The telecom service transponder ID device is activated when the test signal including an appropriate frequency is present to cause excitation in the telecom service transponder ID device. The resonator and transponder devices preferably have very high impedances at all frequencies except at the desired resonant frequency, and thus avoids violation of telephone service standards.

US Patent:

6621904, Sep 16, 2003

Filed:

Sep 29, 1999

Appl. No.:

09/407444

Inventors:

Jonathan Herman Fischer - Blandon PA
Keith Eugene Hollenbach - Kutztown PA
Donald Raymond Laturell - Allentown PA
Lane A. Smith - Easton PA
Weilin Zhu - Allentown PA

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H04M 100

US Classification:

37941301, 37939901, 37939501, 379403, 375297

Abstract:

A circuit provides a modulation signal to an input terminal of a line modulator which places a line current modulated in accordance with the modulation signal on a telephone line. An amplifier of the circuit amplifies an analog input signal to provide the modulation signal at an output terminal. A first resistor and a first capacitor are coupled in series between a first input terminal of the amplifier and the line, and a second resistor and a second capacitor are coupled in series between a second input terminal of the amplifier and the line. First and second precharge amplifiers are used to precharge the first and second capacitors, respectively, to reduce DC setup time.

US Patent:

6625278, Sep 23, 2003

Filed:

Aug 24, 1999

Appl. No.:

09/379603

Inventors:

Paul D. Hendricks - Coopersburg PA
Donald R. Laturell - Allentown PA
Lane A. Smith - Easton PA
Steven B. Witmer - Spring Township, Berks County PA

Assignee:

Agere Systems Guardian Corp. - Allentown PA

International Classification:

H04M 100

US Classification:

379398, 379394, 37939901

Abstract:

An AC impedance matching architecture which provides programmable AC impedance matching in a given range using a digital filter to filter a signal fed back from the impedance matched line to generate an AC impedance emulation control signal. The AC impedance emulation control signal is combined with a transmit signal (if desired) and drives a voltage controlled current source, which is in parallel with a reference impedance. A voltage is developed across the reference impedance to drive, e. g. , the telephone line. The reference impedance is chosen based on a desired maximum AC impedance. The gain of the digital filter, a first order sigma delta filter in the disclosed embodiment, is chosen based on the desired value of the AC impedance. The transfer function of the digital filter is derived based on a desired AC impedance.

US Patent:

6665403, Dec 16, 2003

Filed:

May 11, 1999

Appl. No.:

09/310021

Inventors:

Jonathan Herman Fischer - Blandon PA
Donald Raymond Laturell - Allentown PA
Lane A. Smith - Easton PA

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H04M 100

US Classification:

379413, 379324, 379394, 379398

Abstract:

A digital device for controlling the DC line current on a telephone line which includes a digital device that utilizes a digital filter for setting the DC line current. By controlling the DC line current digitally, software can be used to set the DC line current in accordance with predefined characteristics. Predefined characteristics can be set to accommodate varying country specifications instead of using switches to control resistors and capacitors. In addition, changes in a countrys requirements can be accomplished through software, instead of changing components or redesigning a circuit board. The device also incorporates a method for maintaining DC current level during changes in digital filter characteristics. The use of software results in increased flexibility by allowing an infinite number of settings via software or software updates, and allowing changes to be made quickly and easily throughout the world.

US Patent:

6674856, Jan 6, 2004

Filed:

Sep 23, 1999

Appl. No.:

09/401995

Inventors:

Paul D. Hendricks - Coopersburg PA
Donald R. Laturell - Allentown PA
Lane A. Smith - Easton PA
Steven B. Witmer - Spring Township, Berks County PA

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H04M 100

US Classification:

37939901, 379 9305, 379402, 375254, 375285, 375296

Abstract:

The present invention provides a digital pre-distortion filter in arrangement with a data access arrangement (DAA) on the component side (e. g. , in a modem chipset). This arrangement of the pre-distortion filter outside of the DAA allows digital processes such as digital emulation of the central office impedance to remain unaffected by the pre-distortion in the transmitted signal, allowing the dynamic range of the transmitted signal to be flattened to minimize return loss without complicating the transfer function of the digital emulation of the central office complex load. In the case of a digital emulation filter, placement of a digital pre-distortion filter outside of an analog-to-digital (A/D) digital-to-analog (D/A) loop also minimizes the noise otherwise associated with the use of a pre-distortion filter. Thus, benefits of a pre-distortion filter can be gained without interfering with emulation of impedance, and without causing a significant amount of noise in the transmitted signal.

US Patent:

6674857, Jan 6, 2004

Filed:

Oct 8, 1999

Appl. No.:

09/414568

Inventors:

Jonathan H. Fischer - Blandon PA
Donald R. Laturell - Allentown PA
Lane A. Smith - Easton PA
Michael S. Toth - Allentown PA
Keith E. Hollenbach - Kutztown PA
Weilin Zhu - Allentown PA

Assignee:

Agere Systems Inc. - Allentown PA

International Classification:

H04M 100

US Classification:

379413, 379 9336, 37939501, 37939902

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.