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1. 发明授权

US4130829A Apparatus for adjusting operating conditions of a cathode ray tube 失效
标题翻译：用于调节阴极射线管的操作条件的装置
公开(公告)号：US4130829A
公开(公告)日：1978-12-19
申请号：US871321
申请日：1978-01-23
申请人： George H. Kam , Robert P. Logan
发明人： George H. Kam , Robert P. Logan
IPC分类号： H04N17/04 , H04N9/62 , H04N9/20
CPC分类号： H04N17/04
摘要： Cathode ray tube adjusting apparatus in a color television receiver includes a matrix and amplifier circuit coupled to a chrominance signal source, selectively coupled by a "service-normal" switch to a luminance or reference signal source. The matrixing and amplifying circuit includes a control grid DC bias potential development circuit and a cathode DC bias potential adjusting circuit, and is coupled to a cathode ray tube. In the "service" switching position, the DC bias potential adjusting circuit is varied to provide the proper cut-off potential conditions for the cathode ray tube. In the "normal" switchingposition, chrominance and luminance signals are matrixed and luminance signal drive is adjusted to provide the proper color temperature appearing on a viewing screen of the cathode ray tube.
摘要翻译：彩色电视接收机中的阴极射线管调节装置包括耦合到色度信号源的矩阵和放大器电路，通过“服务正常”开关选择性地耦合到亮度或参考信号源。矩阵化和放大电路包括控制栅极DC偏置电位显影电路和阴极直流偏置电位调节电路，并耦合到阴极射线管。在“服务”切换位置，直流偏置电位调整电路发生变化，为阴极射线管提供适当的截止电位条件。在“正常”切换位置中，将色度和亮度信号进行矩阵化，并调整亮度信号驱动以提供出现在阴极射线管的观察屏幕上的适当色温。

2. 发明授权

US4245186A Tuning voltage interface circuit for electronic tuners 失效
标题翻译：电子调谐器调谐电压接口电路
公开(公告)号：US4245186A
公开(公告)日：1981-01-13
申请号：US968068
申请日：1978-12-11
申请人： Rangaswamy Arumugham , George H. Kam
发明人： Rangaswamy Arumugham , George H. Kam
IPC分类号： H03J3/18 , G05F3/20
CPC分类号： H03J3/185
摘要： A high input impedance, low output impedance, temperature-stable tuning voltage interface circuit with substantial ripple rejection and negligible DC offset. The circuit comprises two transistors of opposite conductivity types, the first being coupled through a resistor to a supply voltage and through a temperature-stabilizing, DC-offsetting diode to the output of the second transistor. The rejection of the ripple voltage superimposed on the supply voltage is determined by the ratio of the value of the resistor to the effective resistance of the diode.
摘要翻译：高输入阻抗，低输出阻抗，温度稳定的调谐电压接口电路，具有显着的纹波抑制和可忽略的直流偏移。电路包括两个相反导电类型的晶体管，第一个通过电阻器耦合到电源电压，并通过温度稳定的DC偏置二极管耦合到第二晶体管的输出端。叠加在电源电压上的纹波电压的抑制取决于电阻值与二极管的有效电阻的比值。

3. 发明授权

US4019160A Signal attenuator circuit for TV tuner 失效
标题翻译：用于电视调谐器的信号衰减器电路
公开(公告)号：US4019160A
公开(公告)日：1977-04-19
申请号：US638144
申请日：1975-12-05
申请人： George H. Kam
发明人： George H. Kam
IPC分类号： H03G1/00 , H03G3/30 , H03H7/24 , H03G3/00 , H04N5/52
CPC分类号： H03H7/24 , H03G1/0052 , H03G3/3057
摘要： In a tuner for a television receiver, an attenuator circuit coupling a signal input to a signal output network includes a series connected controllable impedance and amplifier stage connected to a source of AGC potential whereby increased signal strength causes an increased AGC potential which reduces current flow through and increases the impedance of the controllable impedance while reducing the gain, and consequently the noise, of the amplifier stage coupled to the signal output network.In another aspect of the invention, a second attenuator circuit includes a second controllable impedance series coupling a signal input to the attenuator circuit and a third controllable impedance coupling the junction of the first and second controllable impedances to circuit ground for effecting an additional increased attenuation of a received signal.
摘要翻译：在用于电视接收机的调谐器中，将信号输入耦合到信号输出网络的衰减器电路包括连接到AGC电位源的串联可控阻抗和放大器级，由此增加的信号强度导致增加的AGC电位，其减小电流流过并且增加可控阻抗的阻抗，同时降低耦合到信号输出网络的放大器级的增益，并因此降低噪声。

4. 发明授权

US4218720A Television receiver picture tube protection circuit 失效
标题翻译：电视接收机显像管保护电路
公开(公告)号：US4218720A
公开(公告)日：1980-08-19
申请号：US13851
申请日：1979-02-22
申请人： George H. Kam , John D. Lovely
发明人： George H. Kam , John D. Lovely
IPC分类号： H04N3/20 , H02H3/08
CPC分类号： H04N3/20
摘要： A protection circuit for television receiver picture tubes and related components which includes a diode which is forward biased during normal operation to provide coupling of the tube control grid to ground or reference potential and which is reverse biased during operation at excessively large beam currents, the reverse biasing of the diode causing the beam current to flow through a large grid-cathode resistor thereby effectively limiting electron beam current.
摘要翻译：一种用于电视接收机显像管和相关部件的保护电路，其包括在正常操作期间正向偏置的二极管，以提供管控电网与接地或参考电位的耦合，并且在过大的束电流下在反向偏置二极管的偏置导致光束电流流过大栅极 - 阴极电阻器，从而有效地限制电子束电流。

5. 发明授权

US4153914A Network for applying a plurality of control voltages to a common control terminal 失效
标题翻译：用于将多个控制电压施加到公共控制终端的网络
公开(公告)号：US4153914A
公开(公告)日：1979-05-08
申请号：US892118
申请日：1978-03-31
申请人： Rangaswamy Arumugham , George H. Kam
发明人： Rangaswamy Arumugham , George H. Kam
IPC分类号： H03J7/12 , H04N5/50 , H03K5/00 , H04B1/16
CPC分类号： H03J7/12
摘要： A network for combining a switchable and variable tuning voltage with an AFC voltage so as to effect a change in the tuning control voltage at a tuner's tuning control terminal is disclosed. The network compensates for time delays associated with the AFC time-constant in a manner such that the tuning control voltage responds in proportion to and substantially instantaneously with changes in the tuning voltage. The compensation reduces the probability of AFC false-locking phenomena when, for example, switching from one channel of a television receiver to another.
摘要翻译：公开了一种用于将可切换和可变调谐电压与AFC电压组合以便在调谐器调谐控制端子处实现调谐控制电压变化的网络。网络补偿与AFC时间常数相关的时间延迟，使得调谐控制电压与调谐电压的变化成比例地且基本上瞬时地响应。当例如从电视接收机的一个频道切换到另一个频道时，该补偿降低了AFC假锁定现象的可能性。

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