公开(公告)号：US3688031A

公开(公告)日：1972-08-29

申请号：US3688031D

申请日：1971-05-18

Applicant: RCA CORP

Inventor： FITZGERALD WILLIAM VINCENT JR ,  WILMARTH PAUL CARLETON

IPC: H04N3/20 ,  H04N5/44

CPC classification number: H04N3/20

Abstract: Pending U.S. Pat. Applications Ser. Nos. 103,713 and 121,250 disclose high voltage protection circuits which change the frequency of the horizontal oscillator of a television receiver in response to an indication of increase in the ultor potential developed for its picture tube which could cause danger of Xradiation. Whereas the circuits of such disclosures operate to change a voltage in the horizontal oscillator to which a capacitor is required to charge in establishing the oscillator frequency, the circuit of the instant invention operates to vary a resistance which, together with a capacitor of this type, sets the time constant which determines such frequency.

Abstract translation: 待批美国专利 应用系列 第103,713和121,250号公开了高电压保护电路，其响应于为其显像管产生的阳光阳极电位的增加的指示改变电视接收机的水平振荡器的频率，这可能导致X辐射的危险。 尽管这些公开的电路在建立振荡器频率时改变要求电容器充电的水平振荡器中的电压，但是本发明的电路操作以改变电阻，其与这种类型的电容器一起， 设定确定这种频率的时间常数。

公开(公告)号：US3692932A

公开(公告)日：1972-09-19

申请号：US3692932D

申请日：1971-05-18

Applicant: RCA CORP

Inventor： WILMARTH PAUL CARLETON

IPC: H04N3/20 ,  H04N5/44

CPC classification number: H04N3/20

Abstract: Concurrently filed United States Patent application Ser. No. 144,457, entitled ''''HORIZONTAL OSCILLATOR DISABLING CIRCUIT'''' describes a means of shifting the frequency of the horizontal oscillator of a television receiver in the presence of high voltage increases which could cause X-radiation problems. As therein described, a negative direct voltage indicative of the developed ultor potential for its cathode-ray tube is combined with a relatively stable positive direct voltage to change the bias on a control transistor and the effective resistance in the time constant network determining the oscillator frequency. The present invention provides a further positive direct voltage to the transistor from the brightness control network of the receiver, so as to control the point at which the oscillator goes off frequency as a function of picture tube beam current. Such further voltage will be seen to reduce the criticality in determining the point at which the frequency shifting is to occur and the point at which the reproduced picture becomes unviewable.

Abstract translation: 同时提交的美国专利申请 标题为“水平振荡器消除电路”的第144,457号描述了在存在可能引起X辐射问题的高电压增加的情况下，移动电视接收机的水平振荡器的频率的方法。 如上所述，指示其阴极射线管的开发的高阳电势的负直流电压与相对稳定的正直流电压组合以改变控制晶体管上的偏置，并且确定时间常数网络中的有效电阻确定振荡器频率 。 本发明从接收器的亮度控制网络向晶体管提供进一步的正直接电压，以便根据显像管束电流来控制振荡器关闭频率的点。 将看到这种进一步的电压可以降低确定频移发生的点的重要性以及再现图像变得不可见的点。

公开(公告)号：US3863164A

公开(公告)日：1975-01-28

申请号：US41082273

申请日：1973-10-29

Applicant: RCA CORP

Inventor： SEIBERT WILLIAM LOUIS ,  WILMARTH PAUL CARLETON

IPC: H02M7/06 ,  H04N5/63 ,  H01J19/16

CPC classification number: H02M7/064 ,  H02M2001/0032 ,  H04N5/63 ,  Y02B70/16

Abstract: In a television receiver employing vacuum tubes, and which includes a full-wave bridge rectifier circuit for developing the required direct operating potential for the circuits, and for energizing the filaments, a standby circuit delivers one-half wave rectified voltage to the filaments of the vacuum tubes during standby operation by means of an additional diode in one leg of the bridge rectifier. A switch and a further diode disconnects the bridge rectifier from the power supply filter during standby operation thereby preventing the application of the operating potential to the circuits during the standby operating mode. The circuit delivers full-wave rectified voltage to the filaments during normal operation.

Abstract translation: 在采用真空管的电视接收机中，其包括全波桥式整流电路，用于开发电路所需的直接工作电位，并为灯丝通电，备用电路将二分之一波整流电压输送到 通过在桥式整流器的一个支路中的附加二极管在待机操作期间的真空管。 在待机操作期间，开关和另外的二极管将桥式整流器与电源滤波器断开，从而防止在待机操作模式期间对电路施加工作电位。 该电路在正常工作期间向灯丝提供全波整流电压。