公开(公告)号：US4195314A

公开(公告)日：1980-03-25

申请号：US898867

申请日：1978-04-21

申请人： Willy Minner ,  Paul Sieber ,  Ibolya Haraszti

发明人： Willy Minner ,  Paul Sieber ,  Ibolya Haraszti

IPC分类号： H03J5/02 ,  H04N5/44

CPC分类号： H03J5/0263

摘要： A tuning circuit for tuning a high frequency receiving apparatus with residual sideband modulation, especially a television receiver, with a counter for forming encoded values of tuning voltage, with a store for the digital storing of the encoded values of tuning voltage, with a D/A converter for generating the analog tuning voltages from the encoded values and with a circuit for automatic fine tuning to the required position of a received transmitter. In such tuning circuit means are provided which so alter the value of the tuning voltage before or during writing into the store or after or during reading out from the store that this value corresponds not to the required tuning position but to a tuning position shifted into the fully transmitted sideband. The exact tuning ot the transmitter to the required position is effected by the circuit for fine tuning.

摘要翻译： 一种调谐电路，用于对具有残余边带调制的高频接收装置，特别是电视接收机，具有用于形成调谐电压的编码值的计数器，用于存储用于数字存储调谐电压的编码值的D / A转换器，用于从编码值产生模拟调谐电压，并且具有用于自动微调到所接收的发射机的所需位置的电路​​。 在这种调谐电路中，提供了这样一种方式，即在写入商店之前或期间，在存储之前或之后或从读存储器读出调整电压的值，该值不对应于所需的调谐位置，而是调整到调谐位置 完全传输边带。 发射机到所需位置的精确调谐由微调电路实现。

公开(公告)号：US4220970A

公开(公告)日：1980-09-02

申请号：US856975

申请日：1977-12-02

申请人： Ibolya Haraszti ,  Peter Lackner ,  Willy Minner

发明人： Ibolya Haraszti ,  Peter Lackner ,  Willy Minner

IPC分类号： H03J7/18 ,  H04N5/44 ,  H04N7/08 ,  H04N5/19

CPC分类号： H04N5/44 ,  H03J7/18

摘要： The circuitry is used, for identifying television transmitters, in a television set receiving synchronizing signals and line flyback pulses characteristic of television transmitters, particularly for television receivers including a station finder circuit. The circuitry, during the time period of the line flyback pulses, derives samples of those signals appearing above the black level of the video signal, from the demodulated input signal. The number of amplitude jumps determined during the time period of the line flyback pulses is utilized as the criterion for identification of a television transmitter. The signals appearing above the black level of the video signal are inverted and then combined, in an AND circuit, with the line flyback pulses, and the output of the AND circuit is connected to a digital counter circuit to supply the output pulses thereto as counting pulses, with the flyback pulses being supplied to the digital counter circuit as gate pulses. An inverter is connected to the output of the counter circuit and a logic "1" potential appears at the output of the inverter only in the case where a single pulse has been delivered to the counter circuit during the gate time, with a logic "0" potential appearing at the output of the inverter in all other cases. The output of the inverter is connected, through an integrating circuit, to a threshold circuit providing an output signal which indicates whether a television transmitter has been identified.

摘要翻译： 该电路用于识别电视机中的电视机，该电视机接收电视发射机特性的同步信号和线路反激脉冲，特别是用于包括测站仪电路的电视接收机。 在线路反激脉冲的时间段期间，电路从解调的输入信号中导出出现在视频信号的黑电平之上的那些信号的采样。 在线路反激脉冲的时间段期间确定的振幅跳数被用作电视发射机的识别标准。 出现在视频信号的黑电平上方的信号被反相，然后在AND电路中与线回扫脉冲相结合，AND电路的输出连接到数字计数器电路，以将输出脉冲提供给计数 脉冲，其中回扫脉冲作为门脉冲被提供给数字计数器电路。 反相器连接到计数器电路的输出端，只有在栅极时间内单个脉冲输送到计数器电路的情况下，逻辑“1”电位出现在反相器的输出端，逻辑“0” “在所有其他情况下，逆变器的输出出现电位。 逆变器的输出通过积分电路连接到提供指示电视发射机是否被识别的输出信号的阈值电路。