• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a digital video signal processing system including a kinescope for displaying a video image, a video signal digital-to-analog converter receives input digital video signals and provides high level output analog video signals with a magnitude suitable for directly driving an intensity control electrode (e.g., cathode) of the kinescope.
    公开号:SU1382413A3
    申请号:SU853930799
    申请日:1985-07-23
    公开日:1988-03-15
    发明作者:Хинн Вернер
    申请人:Рка Корпорейшн (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to the production of textiles, specifically to a device for producing video-based digital processing.
    The purpose of the invention is to simplify the device by eliminating buffer and output amplifiers and improving the stabilization of the output signal level.
    Figure 1 shows the structural electrical circuit of the proposed digital video signal processing device; figure 2 - part of the electrical circuit.
    The digital video signal processing device contains a video signal source 1, an analog-digital converter 2, a video processor 3, a digital-to-analog converter, A-2 and 4-3, a color cathode-ray tube 5, an interface 6, the first load resistor 7, the second load resistor 8 , ground bus 9, weight sources 10-1,.,., 10-p dc, switches 11-1, ..., 11-p current, adjustable amplifiers 12-1, .. 12-p, vf The source 13 of the negative reference voltage, source 1A of the positive reference voltage, auxiliary voltage An adjustable variable amplifier 15, made on the MOC transistor, an ogreation amplifier 1, a capacitor 17, an additional source 18 of the reference voltage, a voltage divider 19,
    Digital video processing device operates as follows.
    The analog color image signal from video source 1 is fed to analog-to-digital converter 2, from which the digital color image signal is output to video processor 3, in which several color image signals are generated, each of which is represented as an eight-bit digital signal in binary form. These digital signals are fed to the binary inputs of the corresponding digital-to-digital converters (4-1, 4-2, D-3) from which high-level analog output signals are sent to the corresponding color electron cathodes (1-beam tube 5.
    An 1-1 analog converter 4-1 (a CLP included in a digital video signal processing device works as follows. An eight-bit binary digital signal passes through interface 6, which provides logical matching (compatibility) by shifting the logical levels of digital signals from the video processor to the logical levels matched with the parameters of other schemes. Digital output signals from the interface go to the control inputs of switches 11-1, ..., 11-current, to the information inputs of the The signals from the weight sources 10-1, ..., 10-p of the direct current connected to the source of the negative reference voltage 13 are outputted to each other. The output signals from the switches 11-1, ..., the current of 11-p are supplied respectively, to the first load resistor 7 and to the inputs of the corresponding adjustable amplifiers 12-1, ..., 12-n made on the MOC transistors, the signals from the output of which are fed to the corresponding cathodes of the color cathode ray tube, while the gates of the MOS transistors adjustable amplifiers are supplied from source 14 positive to prine
    Digital video processing device (figure 2) works as follows.
    Operational amplifier 16, when triggered, enters a conducting state during each interval of the damping pulse. Under the action of a trigger pulse, the operational amplifier compares the input voltage from an additional source 18 of the reference voltage with the input voltage from the voltage divider 19. (The error signal corresponding to the amplitude mismatch at the inputs of the operational amplifier 16 is remembered by the capacitor 17 and fed to an additional adjustable amplifier, 15, made on the MOS transistor. The error signal changes the conductivity of the specified amplifier 15, made on the MOS transistor, corresponds to 1 nei {no causing a change in current in volts (a load resistor 8 in the direction of minimizing the mismatch between the input voltage levels of the operational amplifier 16, in.cht; ri e c is ensured blanking the beam in burn -inin LL11 n niogo constant level and so the output voltage on the additional registration uliruemogo amplifier 15, formed on the MOS transistor.
    权利要求:
    Claims (2)
    [1]
    1. A digital video signal processing device containing serially connected video signal sources, an analog-to-digital converter (ADC) and a video processor, the outputs of which are connected to the inputs of the corresponding digital-to-analog converters (DAL) of the R, G, and B signals, as well as a color cathode ray tube (CRT), in this case each DAC contains an INT interface, the inputs of which are co-THF inputs of the DAC, characterized in that, in order to simplify the device by excluding buffer and output amplifiers, the first output of each The D / A signals of R, G, and B are connected to an inputted first load resistor and a color CRT control electrode, and a second output to a second loaded load resistor, the other output of which is connected to the ground bus, with N constant power sources introduced into each DAC. current, n current switches and n adjustable current amplifiers, made on MOS transistors, the inputs of the weight current sources are combined and connected to the negative voltage source, the outputs to the information inputs of the corresponding switch current switches,
    the first inputs of which are combined and are the second output of the LIP, the upper inputs are connected to the corresponding outputs of the interLase, the second output of each current switch is connected to the source of the MOSFET of the corresponding adjustable current amplifier, the gates of which are combined and connected to the source of the positive reference voltage and the MOSFET drains are combined and are the first output of the ADC.
    [2]
    2. A digital device according to claim 1, characterized in that, in order to increase the stabilization of the output signal level, an additional reference voltage source is introduced, an adjustable amplifier made on a MOS transistor, the gate of which is combined with the output of the inserted operational amplifier and connected to one from the capacitor plates of the compressor, the other one of which is connected to the ground bus, while in the additional reference voltage source the first input is connected to the grounded output of the interface, the reference voltage, and the output, to the inverting input of the operational amplifier, the non-inverting input of which is connected to the midpoint of the voltage divider, the first output of which is combined with the first output of the AMS, and the second output is combined with the second output of the second load resistor.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2015160A1|1969-04-01|1970-11-12|Mobil Oil Corp., New York, N.Y. |Video display system|
    US4387405A|1971-01-26|1983-06-07|Rca Corporation|Automatic kinescope bias control system with digital signal processing|
    ES8303868A1|1981-01-26|1983-02-01|Rca Corp|Arrangement for automatically controlling the bias voltage of a picture tube|
    JPS5945319B2|1979-01-31|1984-11-05|Fuji Denko Kk|
    US4240039A|1979-06-11|1980-12-16|National Semiconductor Corporation|MOS Differential amplifier|
    US4257068A|1979-11-29|1981-03-17|Rca Corporation|System for periodically reversing the order of video data in a flat panel display device|
    US4364073A|1980-03-25|1982-12-14|Rca Corporation|Power MOSFET with an anode region|
    DE3126084C2|1981-07-02|1990-07-12|Philips Patentverwaltung Gmbh, 2000 Hamburg|Circuit arrangement for producing analog television signals with amplitude adjustment|
    FR2520177B1|1982-01-15|1986-05-23|Pierre Jutier|DEVICE FOR INPUT AND REALTIME IN REAL TIME OF AN IMAGE FORMED OF SUCCESSIVE FRAMES OF SCANNING LINES|
    GB2121658A|1982-05-28|1983-12-21|Linotype Paul Ltd|Mapping ram for a modulated display|
    JPH0420314B2|1982-08-25|1992-04-02|Sony Corp|
    JPS632490B2|1982-09-22|1988-01-19|Hitachi Ltd|
    US4503454A|1982-11-26|1985-03-05|Rca Corporation|Color television receiver with a digital processing system that develops digital driver signals for a picture tube|
    JPS59151510A|1983-02-18|1984-08-30|Hitachi Ltd|C-mos load type amplifier|
    US4528585A|1983-03-30|1985-07-09|Rca Corporation|Television receiver having picture magnifying apparatus|
    US4556900A|1983-05-25|1985-12-03|Rca Corporation|Scaling device as for quantized B-Y signal|
    EP0135274A3|1983-08-12|1987-12-16|Trw Inc.|Digital-to-analog converter|
    GB2145903A|1983-08-30|1985-04-03|Rca Corp|Sampled data signal processing apparatus|US4603319A|1984-08-27|1986-07-29|Rca Corporation|Digital-to-analog converter with reduced output capacitance|
    JPH06105961B2|1985-04-03|1994-12-21|株式会社日立製作所|Amplifier circuit|
    JPH06105962B2|1985-04-03|1994-12-21|株式会社日立製作所|Amplifier circuit|
    US4942397A|1988-07-26|1990-07-17|Signal Processing Technologies, Inc.|Elimination of linearity superposition error in digital-to-analog converters|
    JP3062035B2|1995-03-31|2000-07-10|インターナショナル・ビジネス・マシーンズ・コーポレ−ション|D / A converter|
    JP4804275B2|2006-08-30|2011-11-02|新電元工業株式会社|Amplifier circuit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/644,398|US4641194A|1984-08-27|1984-08-27|Kinescope driver in a digital video signal processing system|
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