Assignee: Dialog Semiconductor GmbH

Location: Kirchheim/teck-Nabern, DE
No. of patents: 64

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Number	Title	Issue Date
8164382	Concept, method and apparatus of improved distortion switched-mode amplifier Systems and methods for switched-mode amplifiers having improved harmonic distortion are disclosed. High order in-band filtering is enabled without undue trade-off of distortion due to intermodulation/aliasing. A pre-modulation block is introduced, deployed between ...	04/24/2012
8159299	Duplicate feedback network in class D amplifiers A circuit and a method are provided for suppressing the pop and click noise during the power on and power off of Class D amplifiers. The technique also suppresses pops and clicks when the Class D amplifier enters or exits standby mode. A duplicate feedback network i...	04/17/2012
8149250	Gamma curve correction for TN and TFT display modules A circuit and methods eliminating production related luminance variations of electronic display applies to all display technologies that require gamma adjustment or also adjustment of other display parameters e.g. brightness or contrast as e.g. LCD or OLED display m...	04/03/2012
8143953	Self-trim and self-test of on-chip values A self-trim circuit provides a technique to trim a CUT (circuit under trim) using a LSB offset to determine the best digital value to trim the CUT. The self-trim circuit is also used to self-test the digital and analog portions of the self-trim circuitry, whereby th...	03/27/2012
8130022	Ultra-low current push-button switch interface circuit Circuits and methods to achieve a switch interface circuit for a single pole, single throw (SPST) momentary push-button switch consuming a few tens of nanoamps whilst the push-button switch is closed, having low impedance input path when the switch is open in order ...	03/06/2012
8097853	Infrared photocurrent front-end ADC for rain-sensing system with ambient light compensation Systems and methods for a front-end circuit receiving a current from a photodiode receiving a signal light and ambient light have been disclosed. In a preferred embodiment the front-end circuit accommodates a photo diode current, generated by a signal light from an ...	01/17/2012
8060771	Glitch-free clock suspend and resume circuit Circuits and methods to provide a digital clock signal, which can be instantly halted without glitches and then resumes under control of an asynchronous suspend signal with whole width clock pulses has been achieved. The circuit suspends the clock output in either a...	11/15/2011
8058942	Dual reference oscillator phase-lock loop A phase-locked loop has a stable high frequency reference oscillator to provide a stable high frequency reference signal that has reference frequency that is a small submultiple of a generated frequency of a voltage controlled oscillator within the phase-locked loop...	11/15/2011
8044707	VDD/5 or VDD/6 charge-pump Systems and methods to achieve a charge pump for generating from single supply voltage energy efficient supply voltages having a value of ±⅙ Vdd, ±⅕ Vdd, ±¼ Vdd, ±⅓ Vdd, ±½ Vdd or ±1 Vdd that are symmetrical around ground voltage have been disclosed. T...	10/25/2011
8044706	Reduced capacitor charge-pump Systems and methods to achieve a charge pump for generating from single supply voltage energy efficient supply voltages that are symmetrical around ground voltage have been disclosed. The charge pump requires two flying capacitors only. The charge pump generates pos...	10/25/2011
7995021	Combined gamma and phase table data in memory for LCD CSTN displays Methods and systems to optimize the adaptation of gamma curve and phase table data to a color LCD STN display anytime by storing these data in a same memory are disclosed. The gamma curve and phase table data are stored in a same read/write memory element; hence all...	08/09/2011
7991104	Modular low power gray code counter A modular Gray code counter of arbitrary bit length having identical Gray code counter cells in every bit position. Each cell comprises a Toggle Flop and logic which triggers the Toggle Flop and sets the state of the Gray code counter cell. The two outputs of a cell...	08/02/2011
7965138	Concept, method and apparatus of improved distortion switched-mode amplifier Systems and methods for switched-mode amplifiers having improved harmonic distortion are disclosed. High order in-band filtering is enabled without undue trade-off of distortion due to intermodulation/aliasing. A pre-modulation block is introduced, deployed between ...	06/21/2011
7960982	Supply current based testing of CMOS output stages A CMOS driver test configuration, which allows both leakage current and load current testing, using a single monitor, or current meter, located in a power lead of a tester connected to a power pad servicing the driver circuits. Both leakage testing and load current ...	06/14/2011
7936292	Diode smart track Systems and methods to achieve a logarithmic digital-to-analog converter (DAC), which is easy to be implemented, and requiring reduced chip space have been disclosed. The logarithmic DAC is created by a simple and easy to scale linear DAC, which is linearly scaling ...	05/03/2011
7932735	Probeless DC testing of CMOS I/O circuits A method and implementation is described by which I/O input and output circuitry of a CMOS chip are measured without the need to probe the chip. Output driver transistors are used to provide marginal voltages to test input circuits, and the output driver transistors...	04/26/2011
7876151	R/2R programmable gate array Systems and methods to achieve an IC audio volume control requiring minimum silicon area and having an accurate volume control gain setting are disclosed. A resistive element in form of a R/2R ladder is deployed between an output node of an operational amplifier and...	01/25/2011
7843251	HVNMOS/HVPMOS switched capacitor charge pump having ideal charge transfer An integrated circuit for a charge pump with a charge stage and a pump stage and a single High-Voltage PMOS (HVPMOS) transistor as the main switch for each stage and two times two minimum HVPMOS transistors in series as a bulk switch with fixed bulk connections, whe...	11/30/2010
7830197	Adjustable integrator using a single capacitance An integrating amplifier on an IC, which comprises a feedback loop using an external device as an integrating capacitor, has added a second feedback loop that provides an additional current to the input of the amplifier, which current can be used to increase the inp...	11/09/2010
7812753	Tri-level dynamic element matcher allowing reduced reference loading and DAC element reduction Systems and methods using the same to achieve a tri-level multi-bit delta-sigma DAC having reduced power consumption and voltage droop have been achieved. A new rotation-based first order noise-shaping Dynamic Element Matcher (DEM) technique for use with 3-level uni...	10/12/2010
7804282	Buck converter with inductor pre-energizing Circuits and methods to achieve a buck-boost converter, capable to achieve a constant output voltage by pre-charging of an inductor if the input voltage is close to the output voltage has been achieved. The prior art problem of output voltage variations occurring wh...	09/28/2010
7791179	Integrated battery pack with lead frame connection An integrated battery package, that contains semiconductor chips, for example to control and regulate battery charging and to monitor the package operation, uses a single lead frame to interconnect several internal chips, to internally connect said control chips to ...	09/07/2010
7746036	Load current dependent reduction of charge battery current Circuits and methods to charge batteries of a portable device simultaneously with supplying power to the device for its operation, using a power source with limited maximum current, as e.g. an USB port, have been achieved. The system invented relies upon digital con...	06/29/2010
7684833	Micro-controller controlled power management chip Novel power-management chips (PMCS) and a related method to increase the flexibility of power-management chips and to disburden a main controller of mobile electronic devices, such as e.g. a mobile phone, have been achieved. Key of the invention is to implement a mi...	03/23/2010
7626444	Autonomous control of multiple supply voltage generators for display drivers Circuits and methods to operate an arrangement of one or more charge pumps with two or more power supplies where each supply is able to vary over a range of voltages, and where any one supply can be of a higher or lower voltage than any of the others have been achie...	12/01/2009
7609079	Probeless DC testing of CMOS I/O circuits A method and implementation is described by which I/O input and output circuitry of a CMOS chip are measured without the need to probe the chip. Output driver transistors are used to provide marginal voltages to test input circuits, and the output driver transistors...	10/27/2009
7583127	High Q linear controlled variable capacitor using translinear amplifier A voltage controlled variable capacitor, formed of a larger number of fixed capacitor segments and a corresponding number of switching elements, uses translinear amplifiers to control each switching element. Each translinear amplifier linearly switches from the full...	09/01/2009
7514999	Voltage-to-current converter Circuits and methods to achieve a voltage-to-current converter having low noise and a high linearity are disclosed. In a preferred embodiment the converter has been used as a Gm integrator. The core of the invention is an operational transconductance amplifier (OTA)...	04/07/2009
7514989	Dynamic matching of current sources A new system including circuit and methods are given to realize a dynamic matching of current sources, which are arranged as arrays of sets of current sources with added piecewise switchable trim bit transistors. The matching is achieved during an programmed calibra...	04/07/2009
7509113	Monolithic optical autocompensation read-out circuit for precise reflection measurements of distances A circuit and method are given, to realize a loudness control for mobile phone earpieces and speakers with the help of a proximity sensor, which is realized as an infrared photo-electric guard circuit, where only very few external parts are needed. As a novelty here...	03/24/2009
7499855	Delay free noise suppression An apparatus, a circuit and a method are given, to realize very effective noise suppression for speech signals. Using thereby novel calculation methods allow for a real-time operation without any remarkable delay. Also a significant reduction of the overall processi...	03/03/2009
7483418	Data and voice transmission within the same mobile phone call A method is described by which digital data can be sent between mobile phones concurrent with speech during a same phone call. The digital data can be from a digital camera that is integrated with the mobile, or cellular, phone. The discontinuous transmission system...	01/27/2009
7477044	Voltage regulator output stage with low voltage MOS devices Circuits and methods to provide an LDO output stage implemented with low-voltage devices and still allowing higher voltage levels have been achieved. The output stage has been built using two low voltage MOS devices in series. During the time the regulator is in act...	01/13/2009
7477043	Voltage regulator output stage with low voltage MOS devices Circuits and methods to provide an LDO output stage implemented with low-voltage devices and still allowing higher voltage levels have been achieved. The output stage has been built using two low voltage MOS devices in series. During the time the regulator is in act...	01/13/2009
7474291	Relative brightness adjustment for LCD driver ICs Circuits and methods to adjust the brightness of LCD displays have been achieved. The invention applies for LCD systems having a single or multiple display screens. The technique applied makes use of the property of LCDs where each pixel responds to the applied RMS ...	01/06/2009
7446776	Display controller with DRAM graphic memory A system, a circuit and a method are given, to realize a display control and driver interface with graphic display memory, whereby the use of dynamic RAM rather than static RAM for this graphic display memory is new. This has the advantage, that for a given size of ...	11/04/2008
7433477	Audio superpositioning A circuit, which is enabling the superpositioning of different audio signals such as voice, music or ringer signals in a audio output device is achieved. The individual superpositioning can be activated and performed by a combination of resistors and switches withou...	10/07/2008
7391201	Regulated analog switch Circuits and methods to achieve a regulated analog switch being capable to provide an output-voltage not exceeding a defined limit are disclosed. In a preferred embodiment a car battery provides a supply voltage up to 40 Volts, wherein a load must not have an output...	06/24/2008
7388955	Combine audio and ringing mode A circuit where the same amplifiers and the same volume adjustment circuitry are used for the ringer mode as well as for the audio mode of a mobile phone is achieved. The volume adjustment in the audio and ringer mode is provided by a precise amplitude setting via t...	06/17/2008
7332363	Integrated battery pack with lead frame connection An integrated battery package, that contains semiconductor chips, for example to control and regulate battery charging and to monitor the package operation, uses a single lead frame to interconnect several internal chips, to internally connect said control chips to ...	02/19/2008

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Assignee: Dialog Semiconductor GmbH