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    FREQUENCY SYNTHESIZED TRANSCEIVER
    5.
    发明申请
    FREQUENCY SYNTHESIZED TRANSCEIVER 审中-公开
    频率合成收发器

    公开(公告)号：WO1982003477A1

    公开(公告)日：1982-10-14

    申请号：PCT/US1982000392

    申请日：1982-03-30

    Applicant: MOTOROLA INC

    Inventor： MOTOROLA INC ,  BORRAS JAIME ANDRES ,  GONZALEZ RUBEN JESUS ,  SMITH DANIEL MARTIN ,  WIECZOREK ALFRED BRUNO ,  SUAREZ JOSE IGNACIO ,  VICTOR ALAN MICHAEL ,  POPEK MARC HOWARD

    IPC: G06F07/38

    CPC classification number: H03C3/0966 ,  H03C3/0933 ,  H03C3/0941 ,  H03C3/0958 ,  H03C3/227 ,  H03D13/005 ,  H03J5/0281 ,  H03K23/66 ,  H03K23/667 ,  H03L7/0802 ,  H03L7/193 ,  H03L7/199 ,  H04B1/405

    Abstract: A frequency synthesized transceiver capable of tuning to a plurality of communication channels. The transceiver includes a receiver section (72) and a transmitter section (74) which are coupled to the synthesizer which generates the appropriate injection signals to achieve tuning. The frequency synthesizer includes a multiposition switch (52, 200) which accesses various addressable memory locations in a programmable read-only (60) where the appropriate divisors are stored to cause tuning of the synthesizer to the appropriate communication channel. A zone selector switch (202) enables grouping and easy retrievability of channels. The divisors are supplied to a single synchronous binary swallow counter (46) which works in conjunction with a dual modulus prescaler (44) to monitor the frequency output of the voltage controlled oscillator (42). A programmable divider (32) coupled to a reference oscillator source (30) is compared with the output of the synchronous counter in a digital and analog phase detector (34). The phase detector (34) supplies signals through a loop filter (40) to apply the appropriate voltage to the voltage controlled oscillator (42). The phase detector (34) includes means to rapid advance the voltage controlled oscillator to cause frequency tuning.

    Abstract translation: 一种能够调谐到多个通信信道的频率合成收发器。 收发器包括接收器部分（72）和发射器部分（74），其耦合到合成器，其产生适当的注入信号以实现调谐。 频率合成器包括一个多位开关（52,200），该多位开关访问可编程只读（60）中的各种可寻址存储器位置，其中存储适当的除数以使合成器调谐到合适的通信信道。 区域选择器开关（202）使得能够分组并且容易地检索通道。 除数被提供给与双模预分频器（44）一起工作以监视压控振荡器（42）的频率输出的单个同步二进制吞咽计数器（46）。 耦合到参考振荡器源（30）的可编程分频器（32）与数字和模拟相位检测器（34）中的同步计数器的输出进行比较。 相位检测器（34）通过环路滤波器（40）提供信号，以将适当的电压施加到压控振荡器（42）。 相位检测器（34）包括快速前进压控振荡器以引起频率调谐的装置。

    10.
    发明专利
    未知

    公开(公告)号：NO934391L

    公开(公告)日：1993-12-03

    申请号：NO934391

    申请日：1993-12-03

    Applicant: MOTOROLA INC

    Inventor： BORRAS JAIME ANDRES ,  GONZALEZ ARMANDO J ,  CARRALERO CESAR W

    IPC: H03L7/107 ,  H03L7/183 ,  H04B1/40 ,  H03L7/00

    Abstract: A communication device (508) for use in a Time Division Multiplex (TDM) communication system (500) includes a transmitter, a receiver, and a frequency scanner for quickly scanning the radio frequency communication channels to determine an available channel. The communication device (508) also includes a phase locked loop (100) for providing a reference signal for the communication device (508) and locking to the available channel. This phase locked loop (100) includes a Voltage Control Oscillator (VCO) (104) having a control signal input (103). The phase locked loop (100) also includes a first filter (110) and a second filter (108). The first filter (110) has a wide frequency response. The second filter (108) includes a storage element (222) and has a narrow frequency response. The phase locked loop (100) also includes a switching circuit (106) which determines which one of the two filters (110, 108) gets coupled to the voltage control oscillator (104).

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