Patent application number | Description | Published |
20080310616 | METHOD AND SYSTEM FOR SUBSCRIBER LINE INTERFACE CIRCUIT - A subscriber line interface circuit apparatus includes a linefeed circuit and a subscriber line control circuit (SLCC). In an embodiment, the linefeed circuit includes a signal conversion circuit which provides a differential mode signal and a common mode signal in response to at least a tip signal and a ring signal from the subscriber loop. The linefeed circuit includes a tip control circuit and a ring control circuit. In an embodiment, the SLCC is provided in a single integrated circuit chip and is coupled to the linefeed circuit which isolates the SLCC from the tip or ring signals. The SLCC includes a first and a second differential mode inputs for receiving the differential mode signal, and a common-mode input for receiving the common-mode signal. In an embodiment, the SLCC also provides various tip control signals and ring control signals to the tip control circuit and the ring control circuit, respectively. | 12-18-2008 |
20080310655 | PROGRAMMABLE INTEGRATED MICROPHONE INTERFACE CIRCUIT - An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. In an embodiment, the integrated circuit includes a bias circuit, an amplifier circuit and two feedback circuits. The amplifier circuit includes a first input, a second input, and an output. The first input receives either the input signal or a feedback signal, depending upon mode control signals. The second input receives either the feedback signal or the input signal depending upon the mode control signals. The first feedback circuit is in communication with the output and the first input of the amplifier and includes a first resistor and a first capacitor connected in parallel. The second feedback circuit includes an integrator circuit and provides the feedback signal. The mode control signals can be set in a programmable mode control register. | 12-18-2008 |
20090110213 | PROGRAMMABLE INTEGRATED MICROPHONE INTERFACE CIRCUIT - An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. The integrated circuit includes a bias circuit, an amplifier circuit, and two feedback circuits. The bias circuit provides a microphone bias signal to the microphone and provides a sensed microphone signal. The amplifier circuit includes a first input, a second input, and an output. The first input is configured to receive the sensed microphone signal, a first feedback signal, and a second feedback signal. The second input is configured to receive a first reference signal. The feedback circuits are in communication with the output and the first input of the amplifier circuit. In a specific embodiment, the first feedback circuit includes an RC circuit and the second feedback circuit includes an integrator. | 04-30-2009 |
20100086121 | METHOD AND SYSTEM FOR SUBSCRIBER LINE INTERFACE CIRCUIT HAVING A HIGH-VOLTAGE MOS LINEFEED CIRCUIT - A subscriber line interface circuit apparatus includes a linefeed circuit and a subscriber line control circuit (SLCC). In an embodiment, the linefeed circuit includes a signal conversion circuit having cross-coupled first and second MOSFETs for providing a differential mode signal and a common mode signal in response to at least a tip signal and a ring signal from the subscriber loop. The linefeed circuit includes a tip control circuit and a ring control circuit, each having two or more MOSFETs. In an embodiment, the SLCC is provided in a single integrated circuit chip and is coupled to the linefeed circuit which isolates the SLCC from the tip or ring signals. The SLCC includes a first and a second differential mode inputs for receiving the differential mode signal, and a common-mode input for receiving the common-mode signal. | 04-08-2010 |
20100148851 | LOW VOLTAGE ANALOG CMOS SWITCH - A CMOS analog switch circuit includes an NMOS switch transistor, a PMOS switch transistor, and a bias circuit. In an embodiment, the bias circuit includes a first and a second native bias transistors having their gate terminals coupled to a first and a second terminals of the CMOS switch circuit, respectively. The source terminals of the first and the second native bias transistors are coupled together and are also coupled to the body terminal of the PMOS switch transistor. In an configuration, the first and the second native bias transistors are characterized by substantially 0V threshold voltages, and the PMOS switch transistor is configured to exhibit a lower on-resistance in response to the greater of the voltages of the first terminal and the second terminal of the CMOS analog switch circuit. | 06-17-2010 |
20150340187 | ELECTRICALLY RESETTABLE FUSE DEVICE - An integrated circuit is provided that includes an electrically resettable fuse device. The electrically resettable fuse device has a plurality of resettable fuse modules coupled in parallel. Each resettable fuse module including a fuse element characterized by a first and a second impedance states. The plurality of resettable fuse modules are configured such that when the fuse element is in the first impedance state, and a current flowing through each fuse element in a first direction exceeds a current limit, the fuse element enters into the second impedance state. When the fuse element is in the second impedance state and, in response to a global reset signal and a local reset signal, a current is applied to the fuse element in a second direction opposite the first direction, the fuse element is reset to the first impedance state. | 11-26-2015 |
Patent application number | Description | Published |
20130300500 | METHOD AND APPARATUS FOR FILTER-LESS CLASS D AUDIO AMPLIFIER EMI REDUCTION - An audio system includes a speaker and a class D amplifier with a class-D PWM (pulse width modulation) modulator configured for generating first and second PWM signals, each with three differential output levels. The class-D amplifier also has a differential output driver configured for driving a first and a second output signals onto a first and a second output terminals in response to the first and the second PWM signals, wherein each of the first and the second output signals has three differential output levels. An inverse common-mode signal generator is coupled to first and second output signals for providing an inverse common-mode signal. The audio system also includes one or more output terminals for providing the inverse common mode signal, and further includes a wire or a trace on a PCB (printed circuit board) inverse common mode signal. | 11-14-2013 |
20140125411 | METHOD AND APPARATUS FOR FILTER-LESS ANALOG INPUT CLASS D AUDIO AMPLIFIER CLIPPING - An integrated circuit (IC) chip has a class D PWM (pulse width modulation) amplifier configured for generating first and second PWM signals. The class-D PWM modulator includes a differential output driver configured for driving a first and a second output signals in response to the first and the second PWM signals. A clipping detection circuit is configured to turn on a clipping indication signal when one or both of the first PWM signal and the second PWM signal maintain the same state between two consecutive edges of the oscillator clock signal. The clipping detection circuit is also configured to turn off the clipping indication signal when both the first PWM signal and the second PWM signal change states between two consecutive edges of the oscillator clock signal. | 05-08-2014 |
20150063585 | METHOD AND APPARATUS FOR REDUCING CROSSTALK IN AN INTEGRATED HEADSET - An audio system has a first channel for receiving a first input signal and driving a first speaker and a second channel for receiving a second input signal and driving a second speaker. A first feedforward circuit couples an input of the second channel circuit to an input of the first channel circuit. A second feedforward circuit couples an input of the first channel circuit to an input of the second channel circuit. Circuit parameters of the first and the second feedforward circuits are determined such that a first detected output signal is zero when the first input signal is non-zero and the second input signal is zero, and a second detected output signal is zero when the second input signal is non-zero and the first input signal is zero. The audio system is configured to operate using the determined circuit parameters for the first and the second feedforward circuits. | 03-05-2015 |
20150098579 | METHOD AND APPARATUS FOR AN INTEGRATED HEADSET SWITCH WITH REDUCED CROSSTALK NOISE - An integrated audio signal processing circuit is described for reducing crosstalk noise in an integrated headset switch for a headset having two speakers, a microphone sharing a common ground. The audio signal processing circuit includes two audio amplifiers and also has two terminals configured to be either a microphone connection terminal or a headset ground connection terminal, respectively, depending on the type of the headset. An audio amplifier reference node is coupled to inputs of the audio amplifiers. The audio signal processing circuit has a first switch device responsive to a headset ground selection signal and configured to connect the audio amplifier reference node to the detected headset ground connection terminal. The audio signal processing circuit also has a second switch device responsive to the headset ground selection signal and configured to couple the detected headset ground connection terminal to a ground terminal of the audio processing circuit. | 04-09-2015 |
Patent application number | Description | Published |
20090019772 | Method for Limiting the Excess Force of a Closing Part Which is Actuated by an External Force - In a method for limiting the excess force of a closing part of an adjusting device, the closing part is actuated by external force. An anti-jamming system determines, during an adjusting operation, current adjusting force values at least within a partial area of the adjusting path and respectively, in predetermined positions of the closing part, and compares the values to adjusting force comparative values which are already stored in a storage device. At least one of the stored adjusting force comparative values are adapted to mechanical technical conditions of the adjusting device and the extent of the adaptation is predetermined according to the service life. | 01-22-2009 |
20100097026 | METHOD AND DEVICE FOR TRACKING THE POSITION OF A COMPONENT DRIVEN BY AN ELECTRIC MOTOR - In order to track the position of a component driven by an electric motor, wherein rotational movements of the electric motor are detected and used for a position count, deviations from an anticipated position count are determined and added to the position given by the position count as an uncertainty region. | 04-22-2010 |
20100138046 | METHOD AND UNIT FOR OPERATING AN ELECTROMECHANICAL ADJUSTING DEVICE - In a method for operating an electromechanical adjusting device, having an actuating part driven by a controller controlled motor, and which can be adjusted according to a manual specification for a controller operating element between a first and a second end position, the controller detects the precise position of a blockage of an adjusting movement from fed sensor signals, wherein user action performed on the operating element adjusts the actuating part by a first movement directed toward the end position to a position at which mechanical blockage occurs in order to determine a reference position, and adjusts the actuating part by a second movement into the second end position to examine the validity of the previously determined reference position by a test program which decides whether an automatic operating mode, in which an actuating process runs automatically, is activated, or blocked, as a function of the test result. | 06-03-2010 |
20100223025 | METHOD AND DEVICE FOR BALANCING PRODUCTION-RELATED INACCURACIES OF THE MAGNETIC WHEEL OF AN ELECTROMOTIVE DRIVE OF A VEHICLE - In a method and a device for balancing production related inaccuracies of the magnetic wheel of an electromotive drive of a vehicle, correction factors are used, the initial value of which is factory preset, and which are modified in the course of an adaption process until the production-related inaccuracies of the magnetic wheel have been balanced as much as possible. | 09-02-2010 |
20100283417 | METHOD AND DEVICE FOR IDENTIFYING A REVERSING OPERATION IN AN ELECTRIC ACTUATING UNIT OF A VEHICLE - In a method and a device for identifying a reversing operation in an electric actuating unit of a vehicle, once a trapped object is detected, the rotational direction of the electromotive drive is commutated. Sequential pulse interval counter values, derived from a sensor system or data derived from the values is or are written to a ring buffer store and compared with pre-defined reference data patterns. If a match is found, the counter reading of the position counter is corrected in accordance with the pre-defined reference data pattern. This ensures that the counter reading of the position counter is correct even after a reversing operation. | 11-11-2010 |
20110046856 | METHOD AND DEVICE FOR COMPUTER-AIDED DETECTION OF JAMMING OF AN OBJECT - In a computer-aided detection of the jamming of an object, wherein, when adjusting a component of a motor vehicle using an adjusting drive ( | 02-24-2011 |