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    Radio receiver station-seeker stop-signal generator
    21.
    发明授权
    Radio receiver station-seeker stop-signal generator 失效
    无线电接收站 - 寻线者停止信号发生器

    公开(公告)号：US5506906A

    公开(公告)日：1996-04-09

    申请号：US218660

    申请日：1994-03-28

    Applicant: Matthias Herrmann

    Inventor： Matthias Herrmann

    IPC: H03J7/18 ,  H03J1/00 ,  H04B1/16 ,  H04H5/00 ,  H04B1/18

    CPC classification number: H03J1/0091

    Abstract: Radio receivers which scan through a predetermined band of the radio spectrum, in a station-seeking mode, must independently detect whether the currently tuned frequency is the central frequency of the transmitting station and whether this transmitter provides a signal whose strength is sufficient, i.e. whose strength exceeds a predetermined threshold value. Once these two conditions are satisfied, the radio generates a "stop" signal which terminates the station-seeking mode, i.e. keeps the tuning circuit set to the frequency which provided the sufficiently strong signal. The present invention provides an unusually simple way to determine whether these two conditions are satisfied, by using a Finite-Impulse-Response digital filter (2) to extract a d.c. component of the demodulated signal (MPX), for comparison (6) with a predetermined maximum value, and by filtering (10) a field strength signal (FST), for comparison (11) with a predetermined minimum value. When both conditions are satisfied, a simple AND-gate (8) generates the stop-signal.

    Abstract translation: 在寻站模式下扫描无线电频谱的预定频带的无线电接收机必须独立地检测当前调谐的频率是否是发射台的中心频率，以及该发射机是否提供强度足够的信号，即其的 强度超过预定阈值。 一旦满足这两个条件，无线电产生终止寻站模式的“停止”信号，即将调谐电路设置为提供足够强的信号的频率。 本发明通过使用有限脉冲响应数字滤波器（2）提取直流电压来提供用于确定这两个条件是否满足的非常简单的方法。 解调信号（MPX）的分量，用于具有预定最大值的比较（6），并且通过对场强（10）进行滤波（10），以使其具有预定的最小值。 当满足两个条件时，简单的与门（8）产生停止信号。

    Circuit arrangement for frequency conversion of a digital signal
    22.
    发明授权
    Circuit arrangement for frequency conversion of a digital signal 失效
    数字信号频率转换的电路布置

    公开(公告)号：US5204676A

    公开(公告)日：1993-04-20

    申请号：US808336

    申请日：1991-12-16

    Applicant: Matthias Herrmann

    Inventor： Matthias Herrmann

    IPC: H04J3/00 ,  H03H17/06 ,  H04B14/04 ,  H04L7/00 ,  H04L13/08

    CPC classification number: H03H17/0275 ,  H03H17/0628

    Abstract: A circuit arrangement for converting a digital signal of a first frequency into a signal of a second frequency and including an interpolator/decimator is characterized, notably for asynchronous first and second clock signals, in that there is provided at least one multiplexer arrangement which includes a first register which is clocked at the inverted first clock frequency and a second register which is clocked at the second clock frequency, and also includes a multiplexer, the input signal of the multiplexer arrangement being applied to the first register and to a first input of the multiplexer whose second input is coupled to the output of the first register, there also being provided a control circuit which alternately switches the signals applied to the two inputs of the multiplexer to its output in such a manner that at the instants at which this signal is written into the second register a valid signal is always present at the output of the multiplexer.

    Abstract translation: 用于将第一频率的数字信号转换为第二频率的信号并且包括内插器/抽取器的电路装置的特征在于特别地用于异步的第一和第二时钟信号，因为提供了至少一个多路复用器装置，其包括： 以倒置的第一时钟频率计时的第一寄存器和以第二时钟频率计时的第二寄存器，并且还包括多路复用器，多路复用器装置的输入信号被施加到第一寄存器和第一寄存器的第一输入端 多路复用器，其第二输入耦合到第一寄存器的输出，还提供了一个控制电路，其以施加到多路复用器的两个输入的信号交替地切换到其输出，使得在该信号为 写入第二个寄存器中，有效信号始终存在于多路复用器的输出端。

    Method and receiver for receiving a radio broadcast signal having encoded contents
    28.
    发明授权
    Method and receiver for receiving a radio broadcast signal having encoded contents 失效
    用于接收具有编码内容的无线电广播信号的方法和接收机

    公开(公告)号：US06961558B1

    公开(公告)日：2005-11-01

    申请号：US09913376

    申请日：1999-12-21

    Applicant: Matthias Herrmann

    Inventor： Matthias Herrmann

    IPC: G10L19/00 ,  H04B1/16 ,  H04H60/23 ,  H04H60/91 ,  H04K1/00 ,  H04L9/08 ,  H04L9/32 ,  H04N5/60 ,  H04M1/66

    CPC classification number: H04K1/00 ,  H04H60/23 ,  H04H60/91 ,  H04N5/602 ,  H04N21/41422 ,  H04N21/6334 ,  H04N21/8106

    Abstract: A receiver for a radio broadcast signal, in particular a car radio, and a method for receiving a radio broadcast signal, including a signal decoder for decoding an audio signal contained in the radio broadcast signal in encoded form, and/or for decoding a data signal contained in the radio broadcast signal in encoded form, the signal decoder being operable so that the encoded signal is only decoded, when the signal decoder obtains an external authentication signal, which is received via an external transmission path that is different from the transmission path of the radio broadcast signal.

    Abstract translation: 用于无线电广播信号的接收机，特别是汽车无线电台，以及用于接收无线电广播信号的方法，包括用于解码编码形式的无线电广播信号中包含的音频信号的信号解码器和/或解码数据 信号包含在编码形式的无线电广播信号中，信号解码器可操作，使得编码信号仅被解码，当信号解码器获得经由外部传输路径接收的外部认证信号时，该外部认证信号不同于传输路径 的无线电广播信号。

    Digital filter
    29.
    发明授权
    Digital filter 失效
    数字滤波器

    公开(公告)号：US5717726A

    公开(公告)日：1998-02-10

    申请号：US522300

    申请日：1995-09-05

    Applicant: Matthias Herrmann ,  Jurgen Kaesser

    Inventor： Matthias Herrmann ,  Jurgen Kaesser

    IPC: H03H17/04 ,  H03H17/02 ,  H04B1/10 ,  H04B1/16 ,  H04B1/26 ,  H04B1/64 ,  H04H20/88

    CPC classification number: H03H17/0294 ,  H03H2017/0295

    Abstract: The digital filter includes a first multiplier (2) receiving an input signal, an adder (3) connected to the first multiplier (2) to receive its output signal, a delay element (6) connected to the adder (3) to receive its output signal, a second multiplier (7) connected between the delay element (6) and a second input of the adder (3) in a feedback branch, a device (16) for supplying either of two values (K1.1, K1.2) of a first multiplier coefficient to the first multiplier (2) and a device (17) for supplying either of two values (K2.1, K2.2) of a second multiplier coefficient to the second multiplier (7). The second one (K2.2) of the two values of the second multiplier coefficient is advantageously 0, while the second one (K1.2) of the first multiplier coefficient values is equal to a quotient of a predetermined first one of the first multiplier coefficient values and a difference between one and a predetermined first one of the second multiplier coefficient values.

    Abstract translation: PCT No.PCT / DE94 / 00294 Sec。 371 1995年9月5日第 102（e）1995年9月5日PCT PCT 1994年3月17日PCT公布。 第WO94 / 22219号公报 日期1994年9月29日数字滤波器包括接收输入信号的第一乘法器（2），连接到第一乘法器（2）以接收其输出信号的加法器（3），连接到加法器的延迟元件（6） 3）接收其输出信号;在反馈分支中连接在所述延迟元件（6）和所述加法器（3）的第二输入端之间的第二乘法器（7），用于提供两个值（K1 1，K1.2）和用于将第二乘数系数的两个值（K2.1，K2.2）中的任一个提供给第二乘法器（2）的装置（17） 7）。 第二乘法系数的两个值的第二个（K2.2）有利地为0，而第一乘法系数值的第二个（K1.2）等于第一乘法器中预定的第一乘数的商 系数值和第一乘法器系数值中的一个和预定的第一个之间的差。

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