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公开(公告)号：US4390902A
公开(公告)日：1983-06-28
申请号：US315617
申请日：1981-10-28
IPC分类号： H04N5/50
CPC分类号： H04N5/50
摘要： A television (TV) receiver which receives TV signals in a plurality of TV frequency bands includes apparatus for developing an accentuated and uncontaminated on-screen tuning indication. Specifically, a blanking device is responsive to a tuning signal for eliminating the display of a portion of the TV picture for the duration of a pulse signal. The pulse signal is delayed in time relative to a deflection signal by a time related to the tuning signal so that a blanked bar is generated in the TV picture. A tuning indicator device causes a predetermined display unaffected by the TV picture during the blanked portion of the TV picture.
摘要翻译： 在多个TV频带中接收电视信号的电视（TV）接收机包括用于开发突出和未受污染的屏幕上调谐指示的装置。 具体地，消隐装置响应于调谐信号，以消除在脉冲信号的持续时间内的TV图像的一部分的显示。 脉冲信号相对于偏转信号在时间上延迟与调谐信号相关的时间，使得在TV图像中产生消隐的条。 调谐指示器装置在电视画面的空白部分期间引起不受TV图像影响的预定显示。
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2.发明授权Signal-seeking tuning system with automatic bandswitching for a television receiver 失效信号调谐系统，具有电视接收机的自动频带切换功能
公开(公告)号：US4398303A
公开(公告)日：1983-08-09
申请号：US326173
申请日：1981-11-30
摘要： A signal-seeking tuning system for a television receiver scans the VHF and UHF signal bands until a present TV channel signal is detected. Tuning voltage is developed by a digital-to-analog converter in response to a binary word stored in an up/down counter. The value of the binary word increases when a scan-up signal is applied and decreases when a scan-down signal is applied. Band signals are automatically sequenced to the next higher frequency band when the binary word "rolls-over" from a maximum to a minimum value, or to the next lower frequency band when the binary word rolls-over from its minimum to its maximum value. Scanning is stopped by inhibiting changing of the binary word when a valid sequence of AFT signals is detected.Thereafter, the tuning voltage is compensated for drifts by incrementing or decrementing the binary word whenever the AFT signal departs from a predetermined condition. This correction is inhibited, however, when the binary word is at its minimum or maximum value so that unwanted bandswitching is avoided.
摘要翻译： 用于电视接收机的信号寻找调谐系统扫描VHF和UHF信号频带，直到检测到当前TV信道信号。 响应于存储在上/下计数器中的二进制字，由数 - 模转换器开发调谐电压。 当施加扫描信号时，二进制字的值增加，并且当施加扫描信号时，该值减小。 当二进制字从最大值转换到最小值时，当二进制字“滚转”时，频带信号自动排序到下一个较高频带，或者当二进制字从最小值翻转到最大值时，到下一个较低频带。 当检测到AFT信号的有效序列时，禁止二进制字的改变来停止扫描。 此后，只要AFT信号偏离预定条件，通过递增或递减二进制字来对调谐电压进行补偿。 然而，当二进制字处于其最小值或最大值时，该校正被禁止，从而避免了不期望的频带切换。
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公开(公告)号：US4536797A
公开(公告)日：1985-08-20
申请号：US541075
申请日：1983-10-12
IPC分类号： H04N5/445 , H04N5/50 , H04N21/485 , H04N5/44 , H04N5/22
CPC分类号： H04N21/485 , H04N5/44513 , H04N5/50
摘要： As a signal seeking tuner tunes through a number of channels to locate the next active (useable) channel, the display screen of a television receiver is blanked when the receiver is tuned between channels or to an inactive (unuseable) channel for which video signal information is substantially absent. Superimposed over the blanked screen background is a moveable tuning indicator bar, the position of which indicates the channel to which the receiver is tuned. The blanking of the screen prevents the tuning indication from being obscured by background noise.
摘要翻译： 当信号寻求调谐器通过多个通道调谐以定位下一个有效的（可用的）信道时，当接收机在信道之间调谐时，电视接收机的显示屏幕被消隐，或者到视频信号信息的无效（不可用）信道 基本上不存在。 在空白屏幕背景上叠加的是可移动的调谐指示条，其位置指示接收器被调谐到的通道。 屏幕的消隐可防止调谐指示被背景噪音遮蔽。
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4.发明授权Signal-seeking tuning system with signal loss protection for a television receiver 失效用于电视接收机的信号丢失保护的信号寻呼调谐系统
公开(公告)号：US4429415A
公开(公告)日：1984-01-31
申请号：US326171
申请日：1981-11-30
CPC分类号： H03J7/28
摘要： A signal-seeking tuning system for a television receiver scans the VHF and UHF signal bands until a present TV channel signal is detected. Tuning voltage is developed by a digital-to-analog converter in response to a binary word stored in an up-down counter. The value of the binary word increases when a scan-up signal is applied and decreases when a scan-down signal is applied. Scanning is stopped by inhibiting changing of the binary word when a valid sequence of AFT signals is detected.Thereafter, the tuning voltage is compensated for drifts by incrementing or decrementing the binary word whenever the AFT signal departs from a predetermined condition. This correction is inhibited, however, when the RF carrier signal is lost so that the desired tuning is not also lost, whereby the selected channel is still tuned when the RF carrier signal reappears.
摘要翻译： 用于电视接收机的信号寻找调谐系统扫描VHF和UHF信号频带，直到检测到当前TV信道信号。 响应于存储在升降计数器中的二进制字，数字 - 模拟转换器产生调谐电压。 当施加扫描信号时，二进制字的值增加，并且当施加扫描信号时，该值减小。 当检测到AFT信号的有效序列时，禁止二进制字的改变来停止扫描。 此后，只要AFT信号偏离预定条件，通过递增或递减二进制字来对调谐电压进行补偿。 然而，当RF载波信号丢失时，该校正被禁止，使得期望的调谐不会丢失，由此当RF载波信号重新出现时所选择的信道仍被调谐。
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5.发明授权Channel identification apparatus useful in a multiband sweep type tuning system 失效信道识别装置，用于多波段扫描型调谐系统
公开(公告)号：US4254506A
公开(公告)日：1981-03-03
申请号：US43765
申请日：1979-05-30
CPC分类号： H03J1/0033 , H03J5/0263 , H03J7/20
摘要： In a tuning system for generating a tuning voltage for tuning a television receiver, channel identification apparatus includes a memory for storing binary signals representing boundary voltages having magnitudes corresponding to magnitudes of the tuning voltage between tuning voltage ranges for respective adjacent channels within a band. Because the tuning voltage characteristics associated with conventional television receivers include separated portions corresponding to respective frequency bands in which the television channels are located, boundary voltages corresponding to the boundaries of the tuning voltage ranges of the highest and lowest frequency channels in each band are also stored. As the memory locations are addressed, the boundary voltages are compared to the tuning voltages. Control apparatus causes the memory location associated with the next boundary voltage to be addressed and causes channel number apparatus to generate binary signals representing the next channel number when the magnitude of a predetermined one of the boundary voltage associated with an addressed one of the memory locations and the tuning voltage exceeds the magnitude of the other one. Display apparatus displays the channel number represented by the binary signals generated by the channel number apparatus. Because the boundary voltages are utilized, the channel identification apparatus, as disclosed, is particularly well suited for use in a signal seeking system.
摘要翻译： 在用于产生用于调谐电视接收机的调谐电压的调谐系统中，信道识别装置包括用于存储二进制信号的存储器，该二进制信号表示具有与频带内各个相邻信道的调谐电压范围之间的调谐电压的幅度相对应的幅度的边界电压。 由于与常规电视接收机相关联的调谐电压特性包括对应于电视频道所在频带的分离部分，所以与每频带中最高和最低频率信道的调谐电压范围边界对应的边界电压也被存储 。 当寻址存储器位置时，将边界电压与调谐电压进行比较。 控制装置使得与下一边界电压相关联的存储器位置被寻址，并且当与所寻址的一个存储器位置相关联的边界电压的预定的一个的幅度和当存储器位置相关联的边界电压的大小时，使得通道编号装置产生表示下一个通道号的二进制信号 调谐电压超过另一个的幅度。 显示装置显示由通道编号装置产生的二进制信号表示的通道号。 由于利用边界电压，如所公开的那样，信道识别装置特别适用于信号搜索系统。
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6.发明授权
公开(公告)号：US4291413A
公开(公告)日：1981-09-22
申请号：US80105
申请日：1979-09-28
CPC分类号： H03J7/22 , H03J1/0033
摘要： A signal seeking tuning system includes provisions for allowing the direct selection of channels. It includes a memory for storing lower and upper boundaries of a tuning control voltage range for each channel which may be selected. When a channel is selected, a microcomputer causes the memory location corresponding to one of the boundaries associated with the selected channel to be addressed and causes a tuning voltage generator to change the magnitude of the tuning control voltage in the direction of the boundary. A comparator determines when the tuning control voltage reaches the boundary. Thereafter, the microcomputer controls a signal seeking operation between the boundaries to tune the RF carrier associated with the selected channel.
摘要翻译： 信号搜索调谐系统包括允许直接选择频道的规定。 它包括用于存储可以选择的每个通道的调谐控制电压范围的下边界和上边界的存储器。 当选择通道时，微型计算机使得与所选通道相关联的边界之一对应的存储器位置被寻址，并使调谐电压发生器改变沿着边界方向的调谐控制电压的大小。 比较器确定调谐控制电压何时到达边界。 此后，微机控制边界之间的信号寻找操作，以调谐与所选频道相关联的RF载波。
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7.发明授权
公开(公告)号：US4387401A
公开(公告)日：1983-06-07
申请号：US305688
申请日：1981-09-25
CPC分类号： H03J5/0263 , H03J1/0033 , H03J7/20
摘要： In a sweep type tuning system capable of sweeping through a desired range of carrier frequencies selectively in one of two directions, a carrier detector includes a discriminator for generating a discriminator signal as the frequency range is swept which has a first amplitude portion when the frequency of a tuned carrier is less than a predetermined nominal value and a second amplitude portion when the frequency of the tuned carrier is greater than the predetermined nominal value. A sequence detector determines the sequence of generation of the first and second portions of the discriminator signal to generate a signal indicating the presence of the tuned carrier. The presence indicating signal is generated when the sweeping takes place in a first direction if the first and then the second portions are sequentially generated and when the sweeping takes place in the second direction if the second and then first portion are sequentially generated.
摘要翻译： 在能够在两个方向中的一个方向上选择性扫描期望范围的载波频率的扫描型调谐系统中，载波检测器包括用于产生鉴频器信号的鉴频器，当频率范围被扫描时，该频率范围具有第一振幅部分，当频率 当调谐载波的频率大于预定标称值时，调谐载波小于预定标称值和第二振幅部分。 序列检测器确定鉴别器信号的第一和第二部分的产生序列，以产生指示调谐载波的存在的信号。 如果顺序地产生第一和第二部分，并且当依次产生第二部分和第二部分时在第二方向上进行扫描，则在第一方向上进行扫描时，产生存在指示信号。
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公开(公告)号：US4402089A
公开(公告)日：1983-08-30
申请号：US302853
申请日：1981-09-16
CPC分类号： H03J3/28 , H03J5/0263
摘要： A television (TV) receiver tuning system for selecting one of a plurality of receivable TV channels comprises a frequency selective radio frequency device including trimming elements for receiving TV signals, a local oscillator controlled by a first control signal and a mixer in which the TV signals and the local oscillator signal are heterodyned to develop an intermediate frequency signal. A first control device develops the first control signal in response to the selection of a TV channel to control the local oscillator frequency so that the mixer shifts the selected TV channel signal to the IF frequency. A second control device including a PROM trims the frequency selectivity of the RF device using its trimming elements unaffected by selection of the TV channel whereby mechanical alignment of the TV tuning system can be avoided. In other aspects of the invention, the second control device develops signals for adjusting tunable circuits in the IF amplifier, for adjusting the tracking of the local oscillator frequency in relation to its control signal, and, in a double-conversion tuner, for adjusting the frequency of a second local oscillator.
摘要翻译： 用于选择多个可接收TV频道中的一个的电视（TV）接收机调谐系统包括：频率选择性射频设备，包括用于接收TV信号的修整元件，由第一控制信号控制的本地振荡器和其中TV信号 并且本地振荡器信号被外差以产生中频信号。 第一控制装置响应于选择TV信道来开发第一控制信号以控制本地振荡器频率，使得混频器将所选择的TV信道信号移位到IF频率。 包括PROM的第二控制装置使用其修整元件修改RF装置的频率选择性，而不受TV选择的影响，从而可以避免TV调谐系统的机械对准。 在本发明的其他方面，第二控制装置产生用于调整IF放大器中的可调谐电路的信号，用于相对于其控制信号调整本地振荡器频率的跟踪，并且在双转换调谐器中，用于调整 第二本地振荡器的频率。
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公开(公告)号：US4181916A
公开(公告)日：1980-01-01
申请号：US890883
申请日：1978-03-27
申请人： John G. N. Henderson
发明人： John G. N. Henderson
摘要： The channel number display apparatus for a television receiver includes a liquid crystal device. A lamp is positioned with respect to the liquid crystal display device to selectively illuminate it under low ambient light conditions. The lamp is automatically turned on in response to a signal generated by an ambient light sensing circuit which is also utilized to control the contrast and color level characteristics of the receiver in response to ambient light conditions.
摘要翻译： 电视接收机的频道号显示装置包括液晶装置。 相对于液晶显示装置定位灯，以在低环境光条件下选择性地照亮它。 响应于由环境光检测电路产生的信号，灯被自动地接通，其也被用于响应于环境光条件来控制接收器的对比度和色彩水平特性。
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公开(公告)号：US20100045528A1
公开(公告)日：2010-02-25
申请号：US12612483
申请日：2009-11-04
申请人： John G. N. Henderson , Carl Scarpa
发明人： John G. N. Henderson , Carl Scarpa
IPC分类号： H01Q3/00
CPC分类号： H01Q1/007 , H01Q1/24 , H01Q3/2611 , H01Q7/005
摘要： Antennas with steerable antenna patterns and techniques for using such antennas are described. In accordance with the invention, antenna patterns with one or more NULLs are used. Through the use of digital control signals the antenna pattern is steered so that a source of signal interference, e.g., a multipath signal, will be located in a NULL. In this manner the received signal's S/N ratio can be maximized thereby facilitating demodulation. The techniques of the invention can be applied to television, computer devices, mobile devices and a wide range of other systems. Digital commands to control an antenna may include multiple information fields, e.g., a direction field, a channel field, a gain field and a polarity field. Antennas incapable of supporting the specified fields disregard information in fields which are not supported. Information in each supported field is decoded and used to adjust the corresponding antenna characteristic.
摘要翻译： 描述了具有可导向天线方向图和使用这种天线的技术的天线。 根据本发明，使用具有一个或多个NULL的天线方向图。 通过使用数字控制信号，导航天线方向图，使得诸如多路径信号的信号干扰源将位于空值中。 以这种方式，可以使接收信号的S / N比最大化，从而便于解调。 本发明的技术可以应用于电视，计算机设备，移动设备以及各种其他系统。 用于控制天线的数字命令可以包括多个信息字段，例如方向字段，信道字段，增益字段和极性字段。 无法支持指定字段的天线无视不支持的字段中的信息。 每个支持的字段中的信息被解码并用于调整相应的天线特性。
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