Patent application number | Description | Published |
20080198985 | Audio processing apparatus - Audio processing systems and corresponding methods are disclosed, wherein the audio processing system comprises at least one of an analog portion and a digital portion. | 08-21-2008 |
20090154691 | Control circuit for controlling a DC supply voltage for a terminal - A control device for controlling a supply voltage which can be switched between a constant line current operation and a constant line voltage operation, wherein a line current, which consists of a direct current for supplying the terminal and of an alternating current for transmitting information, flows via a subscriber line of a terminal, comprising a sensing circuit for sensing an analogue input voltage dependent on the line current, a subtractor which, in the constant line current operation, subtracts an analogue feedback voltage dependent on an adjustable nominal direct-current value from the sensed input voltage for generating an analogue difference voltage, an analogue/digital converter for converting the generated analogue difference voltage into a digital difference voltage value, a digital low-pass filter for filtering a sequence of control error values out of the generated sequence of difference voltage values, a controller for generating a control value in dependence on the filtered-out sequence of control error values, and comprising a first digital/analogue converter which, in the constant line current operation, converts the control value in each case generated by the controller into the analogue direct voltage for supplying the terminal. | 06-18-2009 |
20100232578 | Line Testing - Embodiments related to line testing are described and depicted. | 09-16-2010 |
20110025343 | Line Testing - Embodiments related to line testing are described and depicted. | 02-03-2011 |
20120063499 | Line Testing - Embodiments related to line testing are described and depicted. A digital subscriber line testing apparatus comprises a plurality of resistors and a switching device. The switching device comprises first and second signal inputs to couple the switching device to a signal generator output, and a plurality of wire terminals. The switching device is configured to switch the plurality of resistors into a first switching state and a second switching state. | 03-15-2012 |
20120099724 | Device for Controlling a Supply Voltage for a Terminal - A control device includes a circuit operable to sense an analogue input voltage dependent on a line current flowing via a communication line of a terminal generate an analogue difference voltage in a constant line current operation based on a difference between the sensed analogue input voltage and an analogue feedback voltage which depends on an adjustable nominal direct-current value and filter a sequence of control error values from a sequence of digital difference voltage values converted from the generated analogue difference voltage. The circuit is further operable to convert a control value generated from the sequence of control error values in the constant line current operation to an analogue direct voltage for supplying the terminal and convert the nominal direct-current value into the analogue feedback voltage in the constant line current operation. | 04-26-2012 |
20120155632 | Codec circuit for POTS system - A CODEC circuit for POTS system comprises a digital circuit for outputting a digital control signal having a first bit width, the digital control signal being indicative of a voltage to be applied to a POTS subscriber line pair. Further, the CODEC comprises a noise shaper coupled to an output of the digital circuit for generating a noise-shaped control signal and a digital-to-analog converter coupled to an output of the noise shaper, the input of the digital-to-analog converter having a second bit width being larger than 1 and smaller than the first bit width. | 06-21-2012 |
20130027055 | COMMUNICATION LINE TESTING WITH PROTECTIVE DEVICES IN PLACE - A system and method for testing a transmission line to a protected system includes measuring voltages between a tip-side node of an overcurrent protection device and the protected system, between a ring-side node of the overcurrent protection device and the protected system, between the tip of the transmission line and the protected system, and between the ring of the transmission line and the protected system. Using the measured voltages, the status of the overcurrent protection device and the overvoltage device may be recognized, and the magnitude of a voltage surge on either of the tip and ring wires may be determined. | 01-31-2013 |
20140328476 | DC/DC Converter For A Subscriber Line Interface Circuit, System, Method & Apparatus - A subscriber line interface circuit (SLIC) is herein described. In accordance with one aspect of the present proffered solution, the SLIC includes a first interface circuit operably coupled to a first subscriber loop and a second interface circuit operably coupled to a second subscriber loop. The SLIC further includes a power supply circuit that is coupled to the first and second interface circuits to provide first and second output voltages to the respective interface circuits. The power supply circuit includes a switching power converter that is operably supplied with an input voltage and is configured to provide an intermediate voltage signal at an intermediate circuit node. At least a first and a second output branch are connected to the intermediate circuit node. Each output branch includes an output capacitor that is coupled to the intermediate circuit node and that provides an output voltage signal that depends on the intermediate voltage signal. The switching power converter is configured to repeatedly set the signal level of the intermediate voltage signal to a high voltage level for a first time interval and to a low voltage level when the first time interval has elapsed. | 11-06-2014 |