公开(公告)号：US4163943A

公开(公告)日：1979-08-07

申请号：US804461

申请日：1977-06-07

申请人： Sukeichi Miki ,  Shuichi Ninomiya ,  Shin Fukuda ,  Yukio Sugimoto

发明人： Sukeichi Miki ,  Shuichi Ninomiya ,  Shin Fukuda ,  Yukio Sugimoto

IPC分类号： H03J1/04 ,  H04B1/26 ,  H04B1/16

CPC分类号： H04B1/26 ,  H03J1/04

摘要： A short wave broadcasting receiver which can receive accurately and stably the desired station is formed with a local oscillator which comprises a variable frequency oscillator, reference frequency oscillators, premixers and band pass filters, frequency converter and an 1F amplifier. By adding a frequency counter unit comprising a frequency counter block and digital display block, the received frequency can be digitally displayed stably and correctly by using a cheap low speed frequency counter.

摘要翻译： 能够准确，稳定地接收期望的站的短波广播接收机由本地振荡器形成，该振荡器包括可变频率振荡器，参考频率振荡器，预混合器和带通滤波器，变频器和1F放大器。 通过添加包括频率计数器块和数字显示块的频率计数器单元，可以通过使用便宜的低速频率计数器来稳定和正确地数字显示所接收的频率。

公开(公告)号：US4041244A

公开(公告)日：1977-08-09

申请号：US628733

申请日：1975-11-04

申请人： Osamu Yamazaki ,  Sukeichi Miki ,  Tsuneo Takezaki

发明人： Osamu Yamazaki ,  Sukeichi Miki ,  Tsuneo Takezaki

IPC分类号： H03C1/04 ,  H04H20/89 ,  H04H5/00

CPC分类号： H04H20/88 ,  H04H20/89

摘要： A stereophonic signal generator for generating a composite signal for effectively attenuating undesired spurious signals in a modulated signal, e.g., in a four channel stereophonic signal. In the generator, the main spurious signal, which is a spurious signal most closely adjacent to a given or desired frequency band for a necessary signal, is cancelled by a cancellation signal which is in a compensation relationship with the main spurious signal. Thus, residual spurious signals are attenuated easily by simple filters without degrading the necessary signals.

摘要翻译： 一种立体声信号发生器，用于产生复合信号，用于有效地衰减调制信号中的不想要的寄生信号，例如在四声道立体声信号中。 在发生器中，作为与必要信号的给定或期望频带最接近的寄生信号的主寄生信号被与主寄生信号处于补偿关系的抵消信号抵消。 因此，残留寄生信号通过简单的滤波器容易地衰减，而不会降低必要的信号。