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61. 发明专利

DE602006017653D1 Sigma-Delta-Modulator 未知
公开(公告)号：DE602006017653D1
公开(公告)日：2010-12-02
申请号：DE602006017653
申请日：2006-03-20
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： KILLAT DIRK , ADLER ANDREAS
IPC分类号： H03M3/02

62. 发明专利

AT485633T 未知
公开(公告)号：AT485633T
公开(公告)日：2010-11-15
申请号：AT06392004
申请日：2006-03-20
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： KILLAT DIRK , ADLER ANDREAS
IPC分类号： H03M3/02
摘要： Circuits and methods for eliminating charge errors caused by parasitic capacitances of delta sigma modulators, which comprises - provide in a modulation stage a first switching means for both positive and negative connections between an output of a differential Gm integrator and a correspondent integration capacitor and two buffer amplifiers in series with a second switching means wherein a first buffer amplifier is parallel to said positive connection and a second buffer amplifier is parallel to said negative connection; - open said first switching means and close said second switching means a short period of time before the chopper at the output of said Gm integrator switches; - precharge output nodes of the Gm integrator using said buffer amplifiers tracking the voltage on the capacitor nodes; and - close said first switching means and open said second switching means.

63. 发明专利

DE602004024294D1 未知
公开(公告)号：DE602004024294D1
公开(公告)日：2010-01-07
申请号：DE602004024294
申请日：2004-06-14
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： ARIGLIANO ANTONELLO
IPC分类号： G05F1/00 , G01R27/28 , G01R31/02 , G01R31/28
摘要： Circuits and related methods to detect efficiently a short-circuit condition of a pad of an IC device efficiently using a comparator and a current mirror configuration have been achieved. The IC device to be tested is free floating. The current mirror configuration comprises four branches, a biasing branch, a first comparator branch, a second comparator branch and a measurement branch. The measurement branch is connected to a pad of the IC device and a measurement current is charged on to the pad. Said measurement current is mirrored from the current of the biasing branch and the measurement current is mirrored to the second comparator branch. Furthermore the current of the biasing branch is mirrored to the first comparator branch using a scale that the current of the first comparator branch is smaller than the current of the biasing branch. In case of a short-circuit the current of the measurement branch can flow and correspondently the current of the second comparator branch is larger than the current of the first comparator branch and hence the comparator, comparing both currents, can indicate a short-circuit situation.

64. 发明专利

AT449993T 未知
公开(公告)号：AT449993T
公开(公告)日：2009-12-15
申请号：AT04392030
申请日：2004-06-14
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： ARIGLIANO ANTONELLO
IPC分类号： G05F1/00 , G01R27/28 , G01R31/02 , G01R31/28
摘要： Circuits and related methods to detect efficiently a short-circuit condition of a pad of an IC device efficiently using a comparator and a current mirror configuration have been achieved. The IC device to be tested is free floating. The current mirror configuration comprises four branches, a biasing branch, a first comparator branch, a second comparator branch and a measurement branch. The measurement branch is connected to a pad of the IC device and a measurement current is charged on to the pad. Said measurement current is mirrored from the current of the biasing branch and the measurement current is mirrored to the second comparator branch. Furthermore the current of the biasing branch is mirrored to the first comparator branch using a scale that the current of the first comparator branch is smaller than the current of the biasing branch. In case of a short-circuit the current of the measurement branch can flow and correspondently the current of the second comparator branch is larger than the current of the first comparator branch and hence the comparator, comparing both currents, can indicate a short-circuit situation.

65. 发明专利

DE60225113T2 未知
公开(公告)号：DE60225113T2
公开(公告)日：2009-02-19
申请号：DE60225113
申请日：2002-04-16
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： SEXAUER EDGAR , GRAEF KLAUS
IPC分类号： H03G3/00 , H04R3/00 , H03F1/34 , H03F3/181 , H03G3/12
摘要： 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 without the need of an additional mixing amplifier as in prior art. One common output stage is used for all the signals activated and superpositioned. The adjustment of the amplitude of the output signal, which can be used for the volume adjustment of a loudspeaker, is provided by a precise amplitude setting via the gain control stages of an inverting voltage amplifier through a current-voltage conversion. Said current-voltage conversion is performed by a string of resistors activated by a string of correspondent switches. This circuit reduces the power consumption, the chip area required and the offset and improves the power supply rejection rate (PSSR).

66. 发明专利

DE602004016961D1 未知
公开(公告)号：DE602004016961D1
公开(公告)日：2008-11-20
申请号：DE602004016961
申请日：2004-05-07
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： COFFEY ANTHONY , SOMERVILLE ALAN
IPC分类号： H02M3/07 , H02M3/156 , H02M3/18
摘要： A DC-to-DC voltage converter having an active charge/discharge circuit enabling the definition of any output voltage within its operating range has been achieved. A comparator compares the output voltage of a voltage converter with a defined reference voltage. This reference voltage can be easily modified within its operating range. In case the output voltage of the voltage converter is higher than said reference voltage a "reservoir" capacitor at the output of said voltage is discharged via an active charge/discharge circuit until the output voltage equals said reference voltage. Said active charge/discharge circuit is activated via a latch by said comparator. The invention is applicable for any type of DC-to-DC converters, such as e.g. charge pumps, buck converters and boost converters.

67. 发明专利

DK1326487T3 未知
公开(公告)号：DK1326487T3
公开(公告)日：2008-11-10
申请号：DK02368001
申请日：2002-01-03
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： KILLAT DIRK
IPC分类号： H05B41/392 , H02M3/02
摘要： A method to control the illumination intensity of a gas discharge lamp is achieved. The method comprises, first, converting an analog lamp illumination signal into a digital lamp illumination signal. The analog lamp illumination signal is a function of the illumination intensity of a gas discharge lamp. Second, digital target signal is subtracted from the digital lamp illumination signal to create a digital error signal. Third, a digital frequency set point is adjusted from a current value to a new value based on the digital error signal. The digital frequency set point is a high resolution digital value. Fourth, the current value and the new value are averaged by a digital delta sigma modulator to create a smoothed frequency set point. The smoothed frequency set point is a medium resolution value. Finally, an oscillating voltage signal is generated with a drive frequency based on the smoothed frequency set point. The drive frequency determines the illumination intensity of the gas discharge lamp.

68. 发明专利

DE60228962D1 未知
公开(公告)号：DE60228962D1
公开(公告)日：2008-10-30
申请号：DE60228962
申请日：2002-10-02
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： LENNARTSON LARS , NILSON JOHAN , KNOEDGEN HORST
IPC分类号： H03F3/217 , H04L1/00 , H03M3/00 , H03M3/02
摘要： The circuit has a sigma delta modulator (22) to convert pulse code modulated (PCM) into power control pulses. An H-Bridge (23) drive voltage into an output load e.g. loud-speaker (24). An algorithm in digital signal processor calculates pulse area error, which is the difference between real and ideal pulse area. An independent claim is also included for a method for compensating the pulse area error in a class-D power amplifier.

69. 发明专利

AT408929T 未知
公开(公告)号：AT408929T
公开(公告)日：2008-10-15
申请号：AT02368108
申请日：2002-10-02
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： LENNARTSON LARS , NILSON JOHAN , KNOEDGEN HORST
IPC分类号： H03F3/217 , H04L1/00 , H03M3/00 , H03M3/02
摘要： The circuit has a sigma delta modulator (22) to convert pulse code modulated (PCM) into power control pulses. An H-Bridge (23) drive voltage into an output load e.g. loud-speaker (24). An algorithm in digital signal processor calculates pulse area error, which is the difference between real and ideal pulse area. An independent claim is also included for a method for compensating the pulse area error in a class-D power amplifier.

70. 发明专利

DE60227479D1 未知
公开(公告)号：DE60227479D1
公开(公告)日：2008-08-21
申请号：DE60227479
申请日：2002-01-03
申请人： DIALOG SEMICONDUCTOR GMBH
发明人： KILLAT DIRK
IPC分类号： H05B41/392 , H02M3/02
摘要： A method to control the illumination intensity of a gas discharge lamp is achieved. The method comprises, first, converting an analog lamp illumination signal into a digital lamp illumination signal. The analog lamp illumination signal is a function of the illumination intensity of a gas discharge lamp. Second, digital target signal is subtracted from the digital lamp illumination signal to create a digital error signal. Third, a digital frequency set point is adjusted from a current value to a new value based on the digital error signal. The digital frequency set point is a high resolution digital value. Fourth, the current value and the new value are averaged by a digital delta sigma modulator to create a smoothed frequency set point. The smoothed frequency set point is a medium resolution value. Finally, an oscillating voltage signal is generated with a drive frequency based on the smoothed frequency set point. The drive frequency determines the illumination intensity of the gas discharge lamp.

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