公开(公告)号：US4641064A

公开(公告)日：1987-02-03

申请号：US728657

申请日：1985-04-29

申请人： William J. Testin ,  Michael P. French

发明人： William J. Testin ,  Michael P. French

IPC分类号： H04N5/63 ,  H01J29/70 ,  H04N5/68

CPC分类号： H04N5/63 ,  H02M2001/0032 ,  Y02B70/16

摘要： In a power-up mode, the power supply of a television receiver generates the normal operating level of an energizing voltage. An overload detector generates a first control signal to shutdown the power supply and remove the energizing voltage when an overload condition occurs. A control circuit periodically samples the level of the energizing voltage. When the level is lower than normal, the control circuit generates a second control signal that maintains the power supply in the shut-down mode so as to prevent the power supply from attempting to restart. A third control signal inhibits the generation of the second control signal when an input alternating current voltage that supplies the power to the power supply suffers a voltage drop or blackout for only a short duration.

摘要翻译： 在上电模式下，电视接收机的电源产生通电电压的正常工作电平。 过载检测器产生第一控制信号以关闭电源，并在发生过载情况时消除通电电压。 控制电路周期性地对供电电压的电平进行采样。 当电平低于正常值时，控制电路产生将电源维持在关闭模式的第二控制信号，以防止电源重启。 当向电源供电的输入交流电压在短时间内遭受电压降或停电时，第三控制信号禁止产生第二控制信号。

公开(公告)号：US4358791A

公开(公告)日：1982-11-09

申请号：US211704

申请日：1980-12-01

申请人： Michael P. French

发明人： Michael P. French

IPC分类号： H04N5/50

CPC分类号： H04N5/50

摘要： In a phase locked loop PLL tuning control system for a voltage controlled local oscillator of the type wherein an automatic fine tuning voltage is selectively applied to the local oscillator after a PLL configuration has obtained lock at the nominal frequency value for the selected channel so as to accommodate frequency translated RF carriers, a circuit selectively activated by the average level of composite synchronization pulses indicative of improper tuning clamps the AFT voltage at a predetermined level. The predetermined level is selected to force the local oscillator frequency to be driven to an offset value at which an offset detector causes reinitiation of PLL control at discrete frequency step from the nominal value for the selected channel.

摘要翻译： 在用于这种类型的电压控制本地振荡器的锁相环PLL调谐控制系统中，其中在PLL配置已经获得锁定在所选频道的标称频率值之后，自动微调电压被选择性地施加到本地振荡器，从而 容纳频率转换的RF载波，由平均电平的复合同步脉冲选择性地激活的电路，其指示不正确的调谐将AFT电压钳位在预定水平。 选择预定电平以迫使本地振荡器频率被驱动到偏移值，在偏移值处，偏移检测器引起来自所选频道的标称值的离散频率步长的PLL控制的重新启动。

公开(公告)号：US4405947A

公开(公告)日：1983-09-20

申请号：US261450

申请日：1981-05-08

申请人： Juri Tults ,  Michael P. French

发明人： Juri Tults ,  Michael P. French

IPC分类号： H03J7/28 ,  H04N5/50 ,  H04B1/16

CPC分类号： H03J7/285 ,  H04N5/50

摘要： A signal seeking tuning control system of a television receiver is first caused to operate in a first mode to search a frequency range surrounding a selected channel in accordance with predetermined conditions of a picture synchronization signal, and thereafter caused to operate in a second mode to search essentially the same frequency range but this time in response to predetermined conditions of an automatic fine tuning signal.

摘要翻译： 首先使电视接收机的信号搜索调谐控制系统按照第一模式进行操作，以根据图像同步信号的预定条件搜索所选频道周围的频率范围，然后使其以第二模式进行搜索 基本上相同的频率范围，但这次是响应于自动微调信号的预定条件。

公开(公告)号：US4656399A

公开(公告)日：1987-04-07

申请号：US728661

申请日：1985-04-29

申请人： William J. Testin ,  Michael P. French

发明人： William J. Testin ,  Michael P. French

IPC分类号： H04N3/20 ,  H01J29/70

CPC分类号： H04N3/20

摘要： A power supply for a television deflection apparatus is turned-on by a user initiated turn-on command. A fault detection circuit samples a voltage derived from the deflection circuit at the end of a predetermined interval that follows the turn-on command. The fault detection circuit issues a turn-off command to immediately shutdown the power supply, if such voltage is below a predetermined level indicative of a fault condition.

摘要翻译： 电视机偏转装置的电源由用户发起的接通指令打开。 故障检测电路在接通命令之后的预定间隔结束时对从偏转电路得到的电压进行采样。 如果这种电压低于指示故障状态的预定电平，则故障检测电路发出关闭命令以立即关闭电源。

公开(公告)号：US4544924A

公开(公告)日：1985-10-01

申请号：US452115

申请日：1982-12-22

申请人： Michael P. French

发明人： Michael P. French

IPC分类号： H03K3/282 ,  H03K17/60 ,  H04Q9/00 ,  G06F1/00

CPC分类号： H03K3/2826 ,  H03K17/60 ,  Y10T307/944

摘要： In a battery operated, remote transmitter for a consumer instrument, a microprocessor controls operation of the transmitter. The collector current path of an on-off transistor is coupled between the battery and a voltage supply terminal of the microprocessor. To power up the microprocessor, a keyboard switch in the transmitter is depressed to activate a separate latch that is coupled to the base of the on-off transistor. Base current flows to the latch to turn on the transistor and apply the battery voltage to the voltage supply terminal of the microprocessor. After completion of the transmitter signaling, the microprocessor switches an output port to the ground state. The output port is coupled to a control terminal of the latch and bypasses holding current from a portion of the latch to initiate the regenerative deactivation of the latch. With the latch deactivated, conduction of the on-off transistor is cut off. The voltage supply terminal of the microprocessor is disconnected from the battery to power down the remote transmitter.

摘要翻译： 在电池供电的情况下，用于消费者仪器的遥控发射器，微处理器控制发射器的操作。 开关晶体管的集电极电流路径耦合在电池和微处理器的电压供应端子之间。 为了加电微处理器，发射器中的键盘开关被按下以激活耦合到开 - 关晶体管的基极的单独锁存器。 基极电流流向锁存器以导通晶体管，并将电池电压施加到微处理器的电压端。 发射机信号完成后，微处理器将输出端口切换到接地状态。 输出端口耦合到锁存器的控制端，并且绕过来自锁存器的一部分的保持电流以启动锁存器的再生去激活。 在锁存器停用时，导通晶体管的导通被切断。 微处理器的电源端子与电池断开连接，以使远程变送器断电。

公开(公告)号：US4364094A

公开(公告)日：1982-12-14

申请号：US261449

申请日：1981-05-08

申请人： Michael P. French ,  Juri Tults

发明人： Michael P. French ,  Juri Tults

IPC分类号： H04N5/44 ,  H03J7/18 ,  H04N5/50 ,  H04N7/02

CPC分类号： H03J7/18

摘要： A detector for determining the validity of a composite synchronization signal to indicate the presence of a picture carrier includes two threshold comparators set just below and just above the maximum and minimum amplitude excursions, respectively, of the synchronization pulses. The output pulses of the threshold comparators are counted during a reference interval to determine if the frequency of the synchronization pulses is correct. Due to the threshold comparators, noise transients are detected and counted so as to cause an incorrect frequency indication. In addition, reference pulses are counted during the duration of the output pulses generated by one of the threshold comparators to determine if the width of the synchronization pulses is correct. The number of incorrect counts of the frequency or width is counted during a measurement interval. If the number of incorrect counts exceeds a predetermined limit, the composite synchronization signal is not a valid one. Hysteresis is also provided to prevent sporadic transitions of sync presence indication.

摘要翻译： 用于确定用于指示图像载体的存在的复合同步信号的有效性的检测器包括分别设置在同步脉冲的最大和最小幅度偏移之下的刚好在正上方的两个阈值比较器。 在参考间隔期间对阈值比较器的输出脉冲进行计数，以确定同步脉冲的频率是否正确。 由于阈值比较器，噪声瞬变被检测和计数，从而导致不正确的频率指示。 此外，在由阈值比较器之一产生的输出脉冲的持续时间内对参考脉冲进行计数，以确定同步脉冲的宽度是否正确。 频率或宽度的不正确计数的数量在测量间隔期间进行计数。 如果错误计数的数量超过预定限制，则复合同步信号不是有效的。 还提供迟滞以防止同步存在指示的偶发转变。

公开(公告)号：US4357632A

公开(公告)日：1982-11-02

申请号：US261448

申请日：1981-05-08

申请人： Michael P. French

发明人： Michael P. French

IPC分类号： H03J7/28 ,  H04N5/50

CPC分类号： H03J7/285 ,  H04N5/50

摘要： A signal seeking tuning system of a television receiver includes a composite synchronization detector which generates a logic "0" when various parameters of the composite synchronization signal is correct and a logic "1" when they are incorrect as the local oscillator frequency is being decreased. After a transition detector determines when a transition from a "0" to "1" occurs, indicating the location of a picture carrier, the frequency of the local oscillator is stopped from changing.

摘要翻译： 电视接收机的信号搜索调谐系统包括复合同步检测器，当复合同步信号的各种参数正确时，其产生逻辑“0”，当本地振荡器频率正在减小时它们不正确时逻辑“1”。 在转换检测器确定何时发生从“0”到“1”的转变时，指示图像载体的位置，停止本地振荡器的频率改变。