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1.发明授权VSB modulator symbol clock processing to reduce jitter/phase noise and sampling artifacts 失效VSB调制器符号时钟处理，以减少抖动/相位噪声和采样伪影公开(公告)号：US06980255B2
公开(公告)日：2005-12-27
申请号：US10279319
申请日：2002-10-24
摘要： A translator demodulates a received digital television signal so as to produce a digital data stream, a symbol clock, and a byte clock, wherein the symbol clock and the byte clock are corrupted by phase noise. The digital data stream is written into a buffer in response to the corrupted byte clock. The corrupted symbol clock is applied to a frequency/phase locked loop having a narrowband loop filter. The frequency/phase locked loop produces a regenerated symbol clock having substantially no phase noise. The digital data stream is read from the buffer in response to the regenerated symbol clock. The digital data stream read from the buffer and the regenerated symbol clock are applied to a modulator for re-broadcasting of the received digital television signal.
摘要翻译： 译码器解调所接收的数字电视信号，以产生数字数据流，符号时钟和字节时钟，其中符号时钟和字节时钟被相位噪声破坏。 响应于损坏的字节时钟，将数字数据流写入缓冲器。 损坏的符号时钟被施加到具有窄带环路滤波器的频率/锁相环路。 频率/锁相环产生基本上没有相位噪声的再生符号时钟。 响应于再生的符号时钟，从缓冲器读取数字数据流。 从缓冲器和再生的符号时钟读取的数字数据流被应用于用于重新广播所接收的数字电视信号的调制器。
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公开(公告)号：US5325025A
公开(公告)日：1994-06-28
申请号：US34920
申请日：1993-03-19
CPC分类号： H04N3/27
摘要： A multiple frequency horizontal scan system includes a scan frequency compensation system which detects horizontal scan frequency changes by frequency detecting the horizontal sync pulses. A frequency responsive switching system couples the appropriate reactive components to the horizontal defection yoke and horizontal output transformer in response to sync pulse frequency. The system further supplies alternative voltages for the scan system operating supply in response to horizontal sync pulse frequency. In addition, the system provides a convenient source of frequency dependent switching signal which may be utilized to operate additional auxiliary elements in response to changes of horizontal scan system frequency.
摘要翻译： 多频水平扫描系统包括通过频率检测水平同步脉冲来检测水平扫描频率变化的扫描频率补偿系统。 响应于同步脉冲频率，频率响应开关系统将适当的无功分量耦合到水平偏转磁轭和水平输出变压器。 该系统还响应于水平同步脉冲频率为扫描系统工作电源提供替代电压。 此外，该系统提供了一个方便的频率依赖切换信号源，可以用来响应水平扫描系统频率的变化来操作额外的辅助元件。
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公开(公告)号：US4408269A
公开(公告)日：1983-10-04
申请号：US389744
申请日：1982-06-18
申请人： Philip J. Nowaczyk
发明人： Philip J. Nowaczyk
IPC分类号： H02M7/06
CPC分类号： H02M7/062
摘要： A balanced, constant current power supply having two rectifying bridges coupled in parallel is energized by an AC source for generating a plurality of DC output voltages. The parallel arrangement of diode rectifying bridges permits the use of low cost, polar electrolytic capacitors in the power supply and results in a balanced circuit capable of generating a plurality of parallel DC outputs. The AC-driven, DC power supply of the present invention operates without a transformer and, in combination with a plurality of shunt regulators, is capable of providing a plurality of well-regulated DC output voltages.
摘要翻译： 具有并联耦合的两个整流桥的平衡恒定电流电源由用于产生多个DC输出电压的AC源激励。 二极管整流桥的并联布置允许在电源中使用低成本的极性电解电容器，并且产生能够产生多个并联DC输出的平衡电路。 本发明的AC驱动的直流电源在没有变压器的情况下工作，并且与多个分流调节器组合能够提供多个良好调节的DC输出电压。
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公开(公告)号：US5216412A
公开(公告)日：1993-06-01
申请号：US620504
申请日：1990-11-30
IPC分类号： H04N3/223
CPC分类号： H04N3/223
摘要： A display monitor includes a conventional CRT and associated display drive circuitry together with conventional horizontal and vertical deflection systems. A high voltage system is operated in response to the horizontal deflection system to produce a CRT accelerating potential. A display size control responds to changes of high voltage system current to produce an error signal which is used to produce compensating amplitude changes of vertical and horizontal deflection currents in order to maintain substantially constant image size.
摘要翻译： 显示器监视器包括常规CRT和相关联的显示驱动电路以及传统的水平和垂直偏转系统。 响应于水平偏转系统操作高电压系统以产生CRT加速电位。 显示尺寸控制响应于高压系统电流的变化，以产生用于产生垂直和水平偏转电流的补偿幅度变化的误差信号，以便保持基本恒定的图像尺寸。
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公开(公告)号：US4005344A
公开(公告)日：1977-01-25
申请号：US589639
申请日：1975-06-23
CPC分类号： H02H11/006 , H02H3/24 , H02H7/18
摘要： A rechargeable battery provides a source of operating potential for an electronic circuit load. An operator controlled on-off switch connects the battery to a relay, and through the normally open relay contacts, to the electronic circuit. The relay winding is returned to ground through a capacitor. When the switch is closed the relay is momentarily energized by the current which charges the capacitor. A transistor has its collector-emitter path in parallel with the capacitor and its base coupled to the movable tap on a voltage divider connected across the load. In the absence of a low voltage condition across the load, the transistor conducts maintaining relay closure for normal circuit operation.
摘要翻译： 可充电电池为电子电路负载提供工作电源。 操作员控制开关开关将电池连接到继电器，并通过常开继电器触点连接到电子电路。 继电器绕组通过电容器返回到地。 当开关闭合时，继电器由电容器充电的电流瞬间通电。 晶体管的集电极 - 发射极路径与电容器并联，并且其基极耦合到跨过负载连接的分压器上的可移动抽头。 在负载不存在低电压条件的情况下，晶体管导通保持继电器闭合以进行正常电路操作。
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公开(公告)号：US5059873A
公开(公告)日：1991-10-22
申请号：US621672
申请日：1990-12-03
摘要： A display monitor includes a conventional cathode ray tube display and display drive. A conventional horizontal deflection system and high voltage system are operable to provide horizontal scan of the cathode ray tube and a high voltage potential therefor. A vertical deflection system suitable for multiple frequency and normal or expanded modes of operation includes a vertical oscillator and vertical amplifier driving a vertical deflection yoke. A sample of the vertical deflection signal is detected by an amplitude detector and compared to a reference amplitude to produce an error signal operative upon the vertical scan system. Individual reference voltages corresponding to normal and expanded modes of operation are selectively coupleable to the reference voltage portion of the system by a selector switch.
摘要翻译： 显示器监视器包括常规的阴极射线管显示和显示驱动器。 常规的水平偏转系统和高压系统可操作以提供阴极射线管的水平扫描和高电压电位。 适用于多频率和正常或扩展工作模式的垂直偏转系统包括垂直振荡器和驱动垂直偏转线圈的垂直放大器。 垂直偏转信号的样本由振幅检测器检测并与基准振幅进行比较，以产生在垂直扫描系统上操作的误差信号。 对应于正常和扩展操作模式的单个参考电压通过选择器开关选择性地耦合到系统的参考电压部分。
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公开(公告)号：US4652987A
公开(公告)日：1987-03-24
申请号：US809988
申请日：1985-12-17
CPC分类号： H02M3/1563
摘要： A regulator for compensating for the IR drop of a rectifier coupled between the secondary winding of a transformer and a load circuit includes a pass transistor connected between the load circuit and the rectifier. A DC reference voltage is developed by a circuit connected across the secondary winding that is not subject to current fluctuations. A differential amplifier is supplied with the reference voltage as one input and the load voltage as another input. The output of the differential amplifier controls the conductivity of the pass transistor. A current limiting transistor is included in the base circuit of the pass transistor and, in turn, is controlled by another differential amplifier supplied with potentials representative of the IR drop across the rectifier. A shut down transistor is provided for cutting of the pass transistor in the event the load circuit voltage drops below a predetermined level.
摘要翻译： 用于补偿耦合在变压器的次级绕组和负载电路之间的整流器的IR降低的调节器包括连接在负载电路和整流器之间的通过晶体管。 直流参考电压由连接在次级绕组上的电路产生，不受电流波动的影响。 差分放大器的参考电压作为一个输入，负载电压作为另一个输入。 差分放大器的输出控制传输晶体管的电导率。 限流晶体管包括在传输晶体管的基极电路中，并且由另一差分放大器控制，该差分放大器提供表示整流器上的IR降的电势。 在负载电路电压低于预定电平的情况下，提供关断晶体管用于切断传输晶体管。
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公开(公告)号：US4331978A
公开(公告)日：1982-05-25
申请号：US212371
申请日：1980-12-03
申请人： Philip J. Nowaczyk
发明人： Philip J. Nowaczyk
摘要： Video display distortion in a television receiver introduced by input voltage excursions is compensated for by a voltage regulation circuit which tracks the changing input line voltage while automatically switching to an active filter mode once the line voltage has decreased to a predetermined level. This permits the removal of AC transients from the fluctuating input signal and avoids display degradation resulting therefrom.
摘要翻译： 通过输入电压偏移引入的电视接收机中的视频显示失真由电压调节电路补偿，该电压调节电路跟踪变化的输入线电压，一旦线电压降低到预定电平，则自动切换到有源滤波器模式。 这允许从波动的输入信号中去除AC瞬变，并避免由此引起的显示器劣化。
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公开(公告)号：US4331977A
公开(公告)日：1982-05-25
申请号：US216692
申请日：1980-12-15
CPC分类号： H04N5/63
摘要： An electronic switch is provided for use in a battery-powered portable television receiver which eliminates power supply current drain when the television receiver is turned off. Coupled transistors are rendered conductive by means of either a clock or a manually switched input signal to provide a direct voltage battery output to television receiver circuitry. Also disclosed in an electronic switch combination for selectively controlling the audio output for the entire television receiver either manually or automatically.
摘要翻译： 提供电子开关用于电池供电的便携式电视接收机，其在电视接收机关闭时消除电源电流消耗。 通过时钟或手动切换输入信号使耦合的晶体管导通，以向电视接收器电路提供直接电压电池输出。 还公开在电子开关组合中，用于以手动或自动方式选择性地控制整个电视接收机的音频输出。
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公开(公告)号：US5220251A
公开(公告)日：1993-06-15
申请号：US583789
申请日：1990-09-17
摘要： A display monitor includes a conventional cathode ray tube display together with conventional display drive circuitry. Vertical and horizontal deflection systems are operative to provide raster scanning of the cathode ray tube. High voltage apparatus produce the required CRT beam accelerating potential. A scan modulator is coupled to the horizontal deflection system and is operative to provide stable control of the amplitude of horizontal deflection signal. A modulator drive control responds to the amplitude of horizontal deflection signal and produces a control signal utilized by the modulator in maintaining stable horizontal scan amplitude. A scan selection network is coupled to the modulator drive control to selectively alter the operating point of the scan modulator and thereby produce different scan widths for normal and expanded view operation.
摘要翻译： 显示器监视器包括与常规显示驱动电路一起的常规阴极射线管显示器。 垂直和水平偏转系统可操作以提供阴极射线管的光栅扫描。 高压设备产生所需的CRT光束加速电位。 扫描调制器耦合到水平偏转系统，并且可操作地提供水平偏转信号的振幅的稳定控制。 调制器驱动控制响应于水平偏转信号的幅度，并产生调制器利用的控制信号，以维持稳定的水平扫描振幅。 扫描选择网络耦合到调制器驱动控制，以选择性地改变扫描调制器的工作点，从而为正常和扩展的视图操作产生不同的扫描宽度。
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