Patents Assigned to Dialogic (US) Inc.
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Patent number: 9929590Abstract: Circuits and methods providing a electronic power supply applicable to any dual supply rail systems, which require a smooth and uninterrupted output supply and a replica power path and autonomous mode of operation from the system power supply are disclosed. In a preferred embodiment of the invention the power supply is applied to a real time clock. An Innovative Replica Power Path concept and circuit implementation ensures the smooth and uninterrupted transfer of power from one input source to the other. The circuit features a Latched Supply Comparator that guarantees the commutation to the Replica Power Path only happens after the voltage is settled. Zero power consumption from the back-up energy source is achieved in the presence of an alternative higher voltage source. The generated RTC supply voltage does not suffer from abrupt changes when the voltage level of the main system power source (battery or charger) is connected or disconnected.Type: GrantFiled: December 23, 2014Date of Patent: March 27, 2018Assignee: Dialog Semiconductor GmbHInventors: Ludmil Nikolov, Carlos Calisto
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Patent number: 9917510Abstract: A system and method of increasing the efficiency in multi-stage power converters by providing an open loop charge pump stage which reacts in part based on information from a closed loop multi-phase buck converter stage.Type: GrantFiled: July 21, 2016Date of Patent: March 13, 2018Assignee: DIALOG SEMICONDUCTOR (UK) LIMITEDInventors: Ershad Ahmed, Sorin Laurentiu Negru, Chi-Man Ng, Alin Gherghescu
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Patent number: 9917519Abstract: A switching power converter is configured to control switching noise by implementing a plurality of pulse width modulation modes of operation. The peak current in each pulse width modulation mode of operation is controlled so that an output power for the switching power converter is continuous with regard to transitions between the pulse width modulation modes.Type: GrantFiled: January 25, 2016Date of Patent: March 13, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: John Shi, John Kesterson, Cong Zheng, Kai-Wen Chin
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Patent number: 9912142Abstract: One embodiment of a disclosed cable protection device connected between the positive and negative wires of the cable that provides an efficient method of protection from overheating of the device due to changes in temperatures with minimal power dissipation. The cable protection device includes a temperature monitoring device that continuously senses the temperature of the cable and device to check for overheating. A controller connected to the temperature monitor sends out an alarm message and a control signal to either an actuator circuit or a crowbar function circuit. The actuator circuit can send out current pulses to the adapter indicating the adapter to lower its current limit, so that the device can still keep charging and is not over heated. The crowbar function circuit causes the adapter to turn off power to the cable in order to provide burning of the device or connector due to overheating.Type: GrantFiled: April 30, 2015Date of Patent: March 6, 2018Assignee: Dialog Semiconductor, Inc.Inventors: Athar Zaidi, Andrey B. Malinin
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Patent number: 9906151Abstract: A switching power converter may include a power switch coupled to a primary winding of a transformer, and a primary controller configured to turn on and off the power switch, a synchronous rectifier switch coupled to a secondary winding of a transformer, and a synchronous rectifier controller configured to turn on and off the synchronous rectifier switch. The synchronous rectifier controller may monitor a voltage across the synchronous rectifier switch. The synchronous rectifier controller may detect a fault condition responsive to the voltage reaching a turn-off voltage threshold before a minimum on-time timer expires. The synchronous rectifier controller may detect a fault condition responsive to the synchronous rectifier switch being turned off at the same time, immediately after, or within a timing guardband after the minimum on-time timer expires. The synchronous rectifier controller may adaptively increase a minimum off-time period for the synchronous rectifier switch.Type: GrantFiled: August 25, 2015Date of Patent: February 27, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Pengju Kong, Wenbo Liang
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Patent number: 9907131Abstract: An arbitrary alignment is provided for a series of pulses controlling a switch that in turn controls a current in an LED. Each pulse is generated according to a target time responsive to a reference time in a corresponding cycle of a synchronization clock. Each pulse has a leading portion that precedes its target time and a trailing portion subsequent to its target time. The arbitrary alignment defines the relative size of the leading portion to the trailing portion such that these relative sizes are incrementally changed across successive ones of the pulses.Type: GrantFiled: June 6, 2017Date of Patent: February 27, 2018Assignee: DIALOG SEMICONDUCTOR INC.Inventors: Lingxin Kong, Nailong Wang, Ze Han
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Patent number: 9887535Abstract: A power providing circuit which is configured to provide a current at an output voltage to a load at an output of the power providing circuit is described. The power providing circuit comprises a power transistor which is configured to draw the current from a supply voltage, wherein a resistance of the power transistor is controlled using a control voltage which is applied to a control port of the power transistor. Furthermore, the power providing circuit comprises short circuit protection circuitry which is configured to couple the control port of the power transistor with a first port of the power transistor to put the power transistor in an off-state, subject to a drop of the output voltage.Type: GrantFiled: August 31, 2015Date of Patent: February 6, 2018Assignee: Dialog Semiconductor (UK) LimitedInventors: Ambreesh Bhattad, Frank Kronmueller, Christian Meindl, Anthony Clowes
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Patent number: 9887674Abstract: A multi-stage amplifier, comprising a first amplifier stage is presented. The output of the first amplifier stage is coupled to a first terminal of a capacitor having a controllable capacitance. The input of a second amplifier stage is coupled to the output of the first amplifier stage and the first terminal of the capacitor. The output of the second amplifier stage is coupled to a second terminal of the capacitor and an output of the multi-stage amplifier. The input of a current sensing circuit is coupled with the output of the multi-stage amplifier. A control signal generator is coupled between the output of the current sensing circuit and a control terminal of the capacitor. The control signal generator provides a control signal to the capacitor in order to control or vary the capacitance of the capacitor.Type: GrantFiled: August 9, 2016Date of Patent: February 6, 2018Assignee: Dialog Semiconductor (UK) LimitedInventors: Carlos Zamarreno Ramos, Ambreesh Bhattad, Frank Kronmueller
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Patent number: 9887625Abstract: A circuit and method for providing an improved current monitoring circuit for a switching regulator. A circuit providing switching regulation with an improved current monitor, comprising a pulse width modulation (PWM) controller configured to provide P- and N-drive signals, an output stage connected to said PWM controller and configured to provide switching, comprising a high-side and low-side transistor, driven by said P- and N-drive signals, respectively, a sense circuit configured to provide output current sensing from the output stage during a sampling period when the N-drive signal is active, and a sampling timing generator configured to provide a an n-sampling signal, nsample, to the sense circuit, wherein a start of the n-sampling signal is delayed by a first delay after the sampling period and the n-sampling signal is ended prior to an end of the sampling period by a second delay.Type: GrantFiled: July 9, 2015Date of Patent: February 6, 2018Assignee: Dialog Semiconductor (UK) LimitedInventor: Seiichi Ozawa
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Patent number: 9882563Abstract: The present disclosure relates to methods and circuits to lowering the signal range of switching or logic circuits below supply range. The circuits may have one or more stages. The supply levels can be set individually for each stage. This may realize amplifiers/attenuators, both digitally and analogically controlled, based on progression and/or modulation in the supply range from stage to stage. A chain of stages can provide the desired power gain by setting the supply progression according to the nature of the incoming signals. The signal levels are lowered by generic device networks comprising voltage sources providing voltages independent of currents flowing through. Decoupling the signal amplitude from DC biasing allows for the signal swing to be lower than threshold voltages of the active devices.Type: GrantFiled: March 29, 2013Date of Patent: January 30, 2018Assignee: Dialog Semiconductor B.V.Inventors: Michele Ancis, Rahul Todi
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Patent number: 9880787Abstract: A patching system and a patching circuit provide a type of patching entry which can replace several sequential memory positions with hardcoded and dynamically configured assembly instructions, thus injecting a small piece of code. The operation of the injected code can be for any purpose, but as an example may be used to seamlessly redirect the execution flow of a processing unit.Type: GrantFiled: August 6, 2015Date of Patent: January 30, 2018Assignee: Dialog Semiconductor B.V.Inventor: Konstantinos Ninos
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Patent number: 9880573Abstract: A low dropout (LDO) device with improved linear mode comprising an error amplifier, a programmable attenuation factor circuit coupled to said error amplifier, a feedback network whose input is electrically connected to said programmable attenuation factor circuit and whose output is electrically coupled to the negative input of said error amplifier, a high side (HS) pre-drive circuit whose input is a high impedance (HiZ) mode signal, a low side (LS) pre-drive circuit whose input is a low pull-down input mode signal, a high side (HS) output stage element electrically coupled to said high side (HS) pre-drive circuit, a low side (LS) output stage element electrically coupled to said low side (LS) pre-drive circuit, and a high side sense (HSENSE) output stage element whose gate is electrically coupled to said high side (HS) pre-drive circuit, and whose gate and source are electrically connected to the output of said error amplifier.Type: GrantFiled: January 6, 2014Date of Patent: January 30, 2018Assignee: Dialog Semiconductor GmbHInventors: Zakaria Mengad, Mykhaylo Teplechuk
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Patent number: 9882477Abstract: A variable efficiency and response buck converter is achieved. The device includes a multi-phase switch, the coupled coils, the filter capacitor, and the load. The multi-phase switch includes the phase control inputs, the circuit common reference, at least two pairs of complementary switches with each switch containing one upper switch and one lower switch, at least two phase control outputs from the complementary switches. The coupled inductive coils are coupled to the phase control outputs to enable weak couplings and strong couplings. Based on the working mode, equivalently the coupled coils can provide strong mutual inductances and weak mutual inductances. The filter capacitors connected to the output of the coupled coils provide high efficiency output to the load.Type: GrantFiled: April 28, 2014Date of Patent: January 30, 2018Assignee: Dialog Semiconductor (UK) LimitedInventor: Mark Childs
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Patent number: 9877367Abstract: An LED lamp comprises one or more LEDs and an LED driver receiving an input signal from a dimmer switch indicative of an amount of dimming for the LED lamp. The LED driver controls regulated current through the one or more LEDs based on the input signal such that an output light intensity of the one or more LEDs substantially corresponds to the amount of dimming for the LED lamp. A regulated output provides operating power for the LED driver. A controller regulates the regulated output to power the LED driver. The controller selects a power source for charging the regulated output from two or more power sources, and the regulated output is charged using the power source selected by the controller.Type: GrantFiled: April 26, 2017Date of Patent: January 23, 2018Assignee: Dialog Semiconductor Inc.Inventors: Chuanyang Wang, Chenglong Zhang, Nan Shi, Clarita C. Knoll, Guang Feng
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Patent number: 9875260Abstract: Systems and methods of provisioning data storage and runtime configuration in telecommunications systems and devices. The systems and methods employ at least one decentralized revision control system as a data repository for storing data, such as configuration data, and at least one data provisioning component as an interface for accessing the configuration data stored in the data repository. By employing the decentralized revision control system in conjunction with the data provisioning component, the systems and methods can provide a data storage and runtime configuration provisioning framework that is data agnostic, application agnostic, and user agnostic, while further providing at least the capability of tracking and maintaining the version history of the configuration data.Type: GrantFiled: January 21, 2016Date of Patent: January 23, 2018Assignee: Dialogic CorporationInventors: Romolo Raffo, Kamlakar N. Patil, Thien Nguyen
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Patent number: 9871946Abstract: Forward error correction is implemented in a facsimile transmission using adaptive redundancy. The depth of redundancy can change based on a number of factors, including lost packet counts, transport type, facsimile modulation type, call history or facsimile engine state changes. Separate redundancy depths can be implemented for image and for control phases of the facsimile call. Redundancy depth can be increased or decreased during a facsimile call, and may be maintained at an increased level once encountered transmission impediments are overcome. Variable redundancy can be provided for specific portions of the call, such as temporarily increased redundancy during control phases. Adaptive redundancy may be implemented at one or more endpoints or nodes in a packet-switched communication network through which the facsimile call passes. The adaptive redundancy contributes to improving successful facsimile call completion in communication networks that may be prone to error losses.Type: GrantFiled: April 13, 2012Date of Patent: January 16, 2018Assignee: Dialogic CorporationInventors: Allan Ashmore, Michael J. Rus
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Patent number: 9864386Abstract: A regulator for providing a load current at a regulator output voltage to a load at an output of the regulator is described. The regulator has a differential input stage to provide a differential output voltage based on a reference voltage and based on the regulator output voltage. Furthermore, the regulator has an output driver to generate a control signal based on the differential output voltage. In addition, the regulator has a pass transistor to provide the load current in dependence of the control signal. The regulator also has clamping circuitry to sense an overvoltage indication which indicates that the pass transistor is being turned off. Furthermore, the clamping circuitry clamps the differential output voltage to a clamping voltage, if the overvoltage indication indicates that the pass transistor is being turned off.Type: GrantFiled: April 5, 2016Date of Patent: January 9, 2018Assignee: Dialog Semiconductor (UK) LimitedInventors: Hande Kurnaz, Ambreesh Bhattad, Frank Kronmueller
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Patent number: 9866123Abstract: A power converter with a dynamic preload. The power converter includes a magnetic component coupled between an input and an output of the power converter. The output of the power converter has an output voltage for providing power to a load. A switch is adapted to control current through the magnetic component according to on and off times of the switch. A dynamic preload circuit is coupled to the output of the power converter. The dynamic preload has loading characteristics that are adjusted responsive to a signal indicative of an output voltage at the output of the power converter.Type: GrantFiled: October 29, 2014Date of Patent: January 9, 2018Assignee: Dialog Semiconductor Inc.Inventors: Jianming Yao, Yimin Chen, Dickson T. Wong, Yong Li
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Patent number: 9863981Abstract: A circuit and a method for sensing a current flowing from a supply voltage into an electric load are presented. The current sensing circuit comprises a first circuit branch connected between the supply voltage and the electric load, a second circuit branch connected between the supply voltage and ground, and an equalization circuit for equalizing a first voltage drop across a first resistive element and a second voltage drop across a second resistive element and for generating an indication of a current flowing through the second circuit branch.Type: GrantFiled: August 23, 2016Date of Patent: January 9, 2018Assignee: Dialog Semiconductor (UK) LimitedInventor: Thomas Jackum
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Patent number: 9857817Abstract: A voltage regulator is described. It includes an amplification stage to control a voltage level of a first gain node and of a second gain node in response to an input voltage, to activate a first and a second output stage, respectively. It further includes the first output stage to source a current at an output node of the voltage regulator from a first potential. The voltage regulator includes the second output stage to sink a current at the output node to a second potential. The voltage regulator includes a first operating point control circuit to set the voltage level of the first gain node such that a first maintenance current is sourced by the first output stage; and/or a second operating point control circuit to set the voltage level of the second gain node such that a second maintenance current is sunk by the second output stage.Type: GrantFiled: January 17, 2017Date of Patent: January 2, 2018Assignee: Dialog Semiconductor (UK) LimitedInventors: Frank Kronmueller, Ambreesh Bhattad