Abstract: Image sensor, which comprises a plurality of pixels arranged as a pixel array with rows and columns and at least one read-out arrangement for reading out the pixels row by row. The columns are grouped into blocks with a certain number N of columns. Each read-out arrangement comprises N column read out circuits and an addressing circuit for with at least two groups of addressing lines for addressing the blocks. The blocks are selectively addressed by the groups of addressing lines in a way that a read-out sequence of blocks addressed by the groups is continuous across all blocks.

Abstract: The invention relates to a method for setting an operating parameter in a peripheral IC. In this method, the operating parameter is transmitted from a central IC via a bus connection to the peripheral IC. The method is characterized in that the operating parameter is initially buffered in a preregister in the peripheral IC, and in that the buffered operating parameter is transferred into a working register only if a transfer signal is sent from the central IC via the bus connection. This method has the advantage that, for example in the case of rapidly changing receive conditions in a send/receive unit, adjustment of the send or receive gain setting is very flexible, and it is easy to avoid an incorrect setting due to a detected signal fluctuation. The invention also relates to a device for carrying out said method.

Abstract: In a data bus with asynchronous data transmission via a clock and a data line, the transmitted data are ascertained by sampling with a multiple of the data rate of the data bus. Sampling is done in this case with a clock which is not synchronous with the asynchronous clock of the data bus. For avoiding interferences which develop due to the unnecessary operation of the interface circuit with a high frequency clock when no data are currently transmitted, a control circuit is provided for detecting the beginning and the end of a data transmission. Only at the beginning of a data transmission, the interface circuit will be supplied with the required clock. After the end of the data transmission, the clock for the interface circuit will be switched off again. The control circuit is preferably designed as a state machine which reacts, without the need for clock signals, to the states on the data and clock line of the data bus.

Abstract: Image sensor, which comprises a plurality of pixels arranged as a pixel array with rows and columns and at least one read-out arrangement for reading out the pixels row by row. The columns are grouped into blocks with a certain number N of columns. Each read-out arrangement comprises N column read out circuits and an addressing circuit for with at least two groups of addressing lines for addressing the blocks. The blocks are selectively addressed by the groups of addressing lines in a way that a read-out sequence of blocks addressed by the groups is continuous across all blocks.

Abstract: In a data bus with asynchronous data transmission via a clock and a data line, the transmitted data are ascertained by sampling with a multiple of the data rate of the data bus. Sampling is done in this case with a clock which is not synchronous with the asynchronous clock of the data bus. For avoiding interferences which develop due to the unnecessary operation of the interface circuit with a high frequency clock when no data are currently transmitted, a control circuit is provided for detecting the beginning and the end of a data transmission. Only at the beginning of a data transmission, the interface circuit will be supplied with the required clock. After the end of the data transmission, the clock for the interface circuit will be switched off again. The control circuit is preferably designed as a state machine which reacts, without the need for clock signals, to the states on the data and clock line of the data bus.

Abstract: The present invention relates to a method and a device for detecting the type of wobble on an optical recording medium. According to the invention, a programmable digitally tuned oscillator is provided for detecting the wobble at different frequencies and the wobble signal is converted to the base band. Favorably the consistency of the phase of the wobble together with the amplitude of the wobble is used for verifying the presence of the wobble. For this purpose a Cartesian to Polar converter is provided.

Abstract: The invention relates to a method for setting an operating parameter in a peripheral IC. In this method, the operating parameter is transmitted from a central IC via a bus connection to the peripheral IC. The method is characterized in that the operating parameter is initially buffered in a preregister in the peripheral IC, and in that the buffered operating parameter is transferred into a working register only if a transfer signal is sent from the central IC via the bus connection. This method has the advantage that, for example in the case of rapidly changing receive conditions in a send/receive unit, adjustment of the send or receive gain setting is very flexible, and it is easy to avoid an incorrect setting due to a detected signal fluctuation. The invention also relates to a device for carrying out said method.

Abstract: The present invention relates to a method and a device for detecting the type of wobble on an optical recording medium. According to the invention, a programmable digitally tuned oscillator is provided for detecting the wobble at different frequencies and the wobble signal is converted to the base band. Favorably the consistency of the phase of the wobble together with the amplitude of the wobble is used for verifying the presence of the wobble. For this purpose a Cartesian to Polar converter is provided.

Abstract: The invention relates to a method for converting a digital signal an analogue signal and to a digital to analogue converter comprising means for converting a digital signal to a thermometer coded signal, means for randomizing the thermometer coded signal, means for controlling the means for randomizing based on the digital signal and means for converting the randomized signal to analogue.

Abstract: A method for generating display correction waveforms for a CRT display comprises the steps of selecting one of a plurality of trace portions for forming part of a correction waveform, the trace portions having different average values. Completing each of the correction waveform by combining each selected trace portion with a respective retrace portion such that all completed correction waveforms have a predetermined average value. The correction waveforms may have vertical and/or horizontal rates.

Abstract: The invention relates to a method for converting a digital signal an analogue signal and to a digital to analogue converter comprising means for converting a digital signal to a thermometer coded signal, means for randomising the thermometer coded signal, means for controlling the means for randomising based on the digital signal and means for converting the randomised signal to analogue.

Abstract: A Circuit for conditioning sync signals for devices for the line-by-line Display of video signals includes, a first input for horizontal sync signals (H1sync, H2sync), a second input for vertical sync signals (Vsync), and a delay stage. The delay stage outputs a signal (Vshift) which is delayed relative to the vertical sync signal (Vsync) by a specific delay time (reg). The circuit determines the timing of the horizontal sync signals (H1sync, H2sync) relative to the vertical sync signal (Vsync) and/or relative to the delayed signal (Vshift). The delay stage is designed in such a way that the delay time (reg) is adjustable.

Abstract: A memory and a switchable digital filter supply different numbers of digital distortion correction values. The supplied distortion correction values are converted to an analog distortion correction signal. A passive, analog low pass filter for the analog distortion correction signal generates an analog deflection signal. The low pass filter is optimized only for those of the analog deflection signals having a given sample rate. A controller varies the different numbers of the supplied distortion correction values to maintain the given sample rate of the analog deflection signal for different horizontal scanning rates. The controller selectively implements respective operating modes for different horizontal scanning frequencies in which no interpolated distortion correction values are supplied or different numbers of interpolated distortion correction values are supplied.

Abstract: In a video display, correction data for a digital convergence arrangement are stored in a first non-volatile memory. During power turn on procedure, the correction data are read out of and stored in a volatile memory. During each deflection cycle, the data stored in the volatile memory are successively read out and applied to an auxiliary convergence winding. When a parity error is detected in the read out data, an output and/or an input of a convergence amplifier is actively disabled to prevent a disturbance of a screen of the cathode ray tube.

Abstract: A circuit for correction of deflection errors in a television set, in which a correction current having alternate forward-sweep and flyback periods is supplied to a correction coil for an error parameter. An amplitude of the correction current is reduced during a time window which corresponds to the flyback period and in which no visible picture is displayed.

Abstract: In a video display, correction data for a digital convergence arrangement are stored in a first non-volatile memory. During power turn on procedure, the correction data are read out of and stored in a volatile memory. During each deflection cycle, the data stored in the volatile memory are successively read out and applied to an auxiliary convergence winding. When a parity error is detected in the read out data, an output and/or an input of a convergence amplifier is actively disabled to prevent a disturbance of a screen of the cathode ray tube.

Abstract: A method for convergence correction in a television receiver and to a television receiver, in particular a projection television receiver having in each case one monochromatic picture tube for the three primary colours, red, green and blue, improves the quality of convergence correction. Each picture tube is assigned a correction device which comprises a convergence circuit. The convergence circuit is assigned a memory in which correction values for the convergence correction of the three picture tubes are stored. In accordance with the correction values, the convergence circuit generates output signals, which are output to a correction device, which in each case comprise at least one correction coil and, for each correction coil, one driver circuit. A correction current is applied to the associated correction coil in order to correct image defects of a picture tube.

Abstract: A switchable digital filter interpolates distortion correction values. The distortion correction values together with interpolated distortion correction values are supplied as an output. Proper operation of the digital filter is disturbed by transient signals occurring during horizontal retrace. The digital output is converted to an analog convergence correction signal. The digital to analog converter has an operating frequency and generates a transient signal during horizontal retrace as the operating frequency increases due to an increased horizontal scanning rate. A low pass filter receives the analog convergence correction signal and generates an analog deflection signal. An auxiliary deflection coil is driven by the analog deflection signal. The digital filter is switched off during the horizontal retrace. The digital filter is thus protected from disturbance by the transient signal and the digital to analog converter is protected from exceeding a maximum operating frequency.

Abstract: The invention relates to a television receiver, in particular a projection television receiver having red, green and blue monochromatic picture tubes, the images of which are projected onto a picture screen. Each picture tube is assigned a correction device comprising a convergence circuit. The convergence circuit is assigned a memory in which correction values for the convergence correction of the three picture tubes are stored. In accordance with the correction values, the convergence circuit generates control signals, which are output to at least one correction coil where each correction coil has one driver circuit. A correction current is applied to the associated correction coil to correct image defects visible on each picture tube.

Abstract: A method and apparatus for obtaining correction values for convergence setting in video projection devices includes calculating the correction values for the individual video lines at least in part by interpolation between correction interpolation point values. The correction interpolation point values are in this case distributed in the form of a grid over the screen area of the video projection device. During the calculation of correction values for the video lines of a first field of the video frame, a respective set of two intermediate or final values for the interpolation is calculated, which set is applicable to neighbouring lines in different video fields, but in each case only one intermediate or final value is used for the convergence correction in the current video line. As a result, optimal convergence correction can be set for each video line without a high memory outlay and without high computing complexity.