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    • 22. 发明授权
    • Receiver and transmitter-receiver
    • 接收机和发射机 - 接收机
    • US06259895B1
    • 2001-07-10
    • US09141854
    • 1998-08-28
    • Yoshishige YoshikawaYoshio HoriikeHisashi AdachiHiroaki Kosugi
    • Yoshishige YoshikawaYoshio HoriikeHisashi AdachiHiroaki Kosugi
    • H04B138
    • H04B1/403H04B1/44
    • In the receiver using a PLL synthesizer, there is a limit in reducing boot-up time or frequency switching time, which shortens battery life. A first local frequency L01 from a multiplier 22 and a receiving signal are input to a first frequency converter 10 to convert it to a first intermediate frequency IF1. The first intermediate frequency IF1 is converted in a second frequency converter 12 by a frequency L02 of an N1 frequency divider 24 to a second intermediate frequency IF2. Also, the outputs of the N1 frequency divider 24 and N2 frequency divider 26 are mixed in the frequency converter for transmission 34, and L04 and the local frequency L01 are added to a lower-side-band cancel mixer 50 to extract the upper side band of the transmission frequency. With the configuration in which a frequency may be varied by one channel interval by varying the frequency division number of the N1 frequency divider 24 by one, switching of frequency division number permits channel switching for both transmission and reception.
    • 在使用PLL合成器的接收机中,减少启动时间或频率切换时间有限制,这缩短了电池寿命。来自乘法器22的第一本地频率L01和接收信号被输入到第一变频器10至 将其转换为第一中间频IF1。 第一中频IF1在第二频率转换器12中被N1分频器24的频率L02转换到第二中频IF2。 此外,N1分频器24和N2分频器26的输出在变频器34中混合,用于变速器34,并且将L04和本地频率L01相加到下侧带取消混频器50以提取上侧频带 的传输频率。 通过将N1分频器24的分频数改变1,频率可以变化一个信道间隔的配置,分频数的切换允许发送和接收的信道切换。
    • 24. 发明授权
    • Radio receiver apparatus of orthogonal detection type comprising local
oscillator means with improved automatic frequency control arrangement
    • 包括具有改进的自动频率控制装置的本地振荡器装置的无线电接收装置
    • US5548619A
    • 1996-08-20
    • US374915
    • 1995-01-19
    • Yoshio HoriikeYasuo YoshimuraYoshiyuki YokoajiroTerue MatsumuraMakoto HasegawaMasahiro Mimura
    • Yoshio HoriikeYasuo YoshimuraYoshiyuki YokoajiroTerue MatsumuraMakoto HasegawaMasahiro Mimura
    • H04B1/26H04L27/152H04L27/227H04L27/06
    • H04L27/1525H04L27/2273
    • In a radio receiver apparatus of an orthogonal detection type, a voltage controlled first local oscillator generates a first local oscillation signal, and mixers mix an inputted reception signal with the first local oscillation signal and a 90.degree. shifted signal thereof, respectively, the mixed signals respectively being passed through first and second band-pass filters to obtain desired first intermediate frequency signals. Further, a second local oscillator generates a second local oscillation signal. Further mixers mixes the first intermediate frequency signals from the first and second band-pass filters with the second local oscillation signal and a 90.degree. shifted signal thereof, respectively. Then there is calculated either one of a sum of and a difference between the resulting mixed signals, the calculated signal being passed through a third band-pass filter to obtain a second intermediate frequency signal to be demodulated. Furthermore, an average frequency detector detects an average frequency of the second intermediate frequency signal for a predetermined time interval, and a frequency correction circuit controls the first local oscillation frequency of the first local oscillation signal based on the detected average frequency.
    • 在正交检测型的无线电接收机装置中,电压控制的第一本地振荡器产生第一本地振荡信号,并且混频器将输入的接收信号与第一本地振荡信号及其90°移位信号分别混合,混合信号 分别通过第一和第二带通滤波器以获得期望的第一中频信号。 此外,第二本地振荡器产生第二本地振荡信号。 另外的混频器将来自第一和第二带通滤波器的第一中频信号与第二本地振荡信号和其90度移位信号分别混合。 然后,计算得到的混合信号之和的和之一,计算出的信号通过第三带通滤波器以获得待解调的第二中频信号。 此外,平均频率检测器以预定时间间隔检测第二中频信号的平均频率,并且频率校正电路基于检测到的平均频率来控制第一本地振荡信号的第一本地振荡频率。
    • 26. 发明授权
    • 4-Channel stereophonic demodulating system
    • 4通道立体声解调系统
    • US3985964A
    • 1976-10-12
    • US517610
    • 1974-10-24
    • Tsuneo OhkuboYoshio Horiike
    • Tsuneo OhkuboYoshio Horiike
    • H04H20/89H04S3/02H04H5/00H04R5/00
    • H04H20/89H04S3/02
    • A 4-channel stereophonic demodulating system based on a switching mode, which comprises a plurality of switching means for demodulating a received 4-channel stereophonic composite signal under control by a first and a second switching signals obtained from a pilot signal, means to separately derive four stereophonically related signals at the respective output terminals of said switching means, and adding means to add plural output signals from at least one switching means to each other. The signal levels of the individual channel signal components are adjustable by said adding means relative to one another to enable separation adjustment, so that in each of the four stereophonically related signals which appear at respective output terminals of the system, cross-talk due to the other signals is reduced.
    • 一种基于切换模式的4声道立体声解调系统,包括多个切换装置,用于通过由导频信号获得的第一和第二切换信号进行控制来解调所接收的4声道立体声复合信号,分别导出 在所述开关装置的各个输出端子处的四个立体声相关信号,以及相加装置,用于将来自至少一个开关装置的多个输出信号彼此相加。 各个通道信号分量的信号电平可由所述相加装置相对于彼此调节,以使得能够进行分离调整,使得在出现在系统的相应输出端的四个立体声相关信号的每一个中,由于 其他信号减少。