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    • 8. 发明授权
    • Transceiver having a divide-down transmit offset scheme
    • 收发器具有分频传输偏移方案
    • US5276915A
    • 1994-01-04
    • US787279
    • 1991-11-04
    • Paul D. MarkoJaime A. Borras
    • Paul D. MarkoJaime A. Borras
    • H04B1/40H04B15/04
    • H04B1/405H04B15/04H04B2215/064
    • A radio communication device, having a receive mode and a transmit mode, includes a receiver portion, a transmitter portion, and multiple oscillators for providing reference waveforms for the radio communication device. During the receive mode, the receiver portion receives signals having a selected frequency, converts received signals to at least a first intermediate frequency (IF), and a transmitter oscillator produces a first waveform having a frequency equal to a multiple of the first intermediate frequency during the receive mode. During the transmit mode, the transmitter portion requires a reference waveform having an offset frequency equivalent to the first IF frequency to produce a radio frequency signal. Thus, the radio communication device also comprises a divider coupled to the transmitter oscillator for dividing the frequency of the first waveform to the required offset frequency in the transmit mode.
    • 具有接收模式和发送模式的无线电通信装置包括用于为无线电通信装置提供参考波形的接收机部分,发射机部分和多个振荡器。 在接收模式期间,接收机部分接收具有选定频率的信号,将接收到的信号转换成至少第一中频(IF),发射机振荡器产生频率等于第一中频倍数的第一波形 接收模式。 在发射模式期间,发射机部分需要具有等于第一IF频率的偏移频率的参考波形,以产生射频信号。 因此,无线电通信设备还包括耦合到发射机振荡器的分频器,用于在发送模式中将第一波形的频率划分为所需的偏移频率。
    • 9. 发明授权
    • Energy saving protocol for a communication system
    • 一种通信系统的节能协议
    • US5128938A
    • 1992-07-07
    • US666499
    • 1991-03-06
    • Jaime A. Borras
    • Jaime A. Borras
    • G08B3/10H04B1/16H04M1/73H04W52/02H04W84/08
    • H04W84/08G08B3/1066H04W52/0232Y02B60/50
    • A centralized communication system controller (102) measures and stores a historical record of each subscriber unit's communication activity. By examining this historical record, the controller predicts the subscriber unit's communication activity over a future time interval. A code based upon this prediction is transmitted to the subscriber unit (110), which causes the subscriber unit to enter an energy saving mode and deactivate (208) non-essential circuits for a time period represented by the code. In this way, the duration of the "sleep" interval may be optimally varied based upon the subscriber unit's communication history. In another aspect of the invention, unexpected messages for a subscriber unit in the energy saving mode are stored (114) electronically until the conclusion of the "sleep" interval. This message storing function enhances system efficiency when the subscriber unit's communication history does not correlate with actual commuication traffic.
    • 集中式通信系统控制器(102)测量和存储每个用户单元的通信活动的历史记录。 通过检查这个历史记录,控制器在未来的时间间隔内预测用户单元的通信活动。 基于该预测的代码被发送到用户单元(110),其使得订户单元进入节能模式并且在由代码表示的时间段内去激活(208)非必需电路。 以这种方式,可以基于用户单元的通信历史来最佳地改变“睡眠”间隔的持续时间。 在本发明的另一方面,用于节能模式的用户单元的意外消息以电子方式存储(114)直到“睡眠”间隔的结束为止。 当用户单元的通信历史与实际通信流量不相关时,该消息存储功能提高了系统效率。
    • 10. 发明授权
    • Battery saving system for a frequency synthesizer
    • 频率合成器节电系统
    • US4631496A
    • 1986-12-23
    • US808905
    • 1985-12-13
    • Jaime A. BorrasJose I. Suarez
    • Jaime A. BorrasJose I. Suarez
    • H03C3/09H03C3/22H03D13/00H03J5/02H03K23/66H03L7/08H03L7/193H03L7/199H04B1/40H03L7/18
    • H03C3/0966H03C3/0933H03C3/0941H03C3/0958H03C3/227H03D13/005H03J5/0281H03K23/66H03K23/667H03L7/0802H03L7/193H03L7/199H04B1/405
    • A frequency synthesized transceiver capable of tuning to a plurality of communication channels is disclosed. The transceiver includes a receiver and a transmitter section which are coupled to the synthesizer which generates the appropriate injection signals to achieve tuning. A battery saving circuit generates a battery saving signal having a predetermined duty cycle and period and is responsive to the phase detector in the synthesizer to disrupt power to the synthesizer while maintaining precise tuning. The battery saver circuit is also responsive to the transceiver. In a normal receive operation, a battery saving circuit synchronizes its battery saving signal with the hold condition of the phase detector to disrupt power to selected modules in the synthesizer without altering the injection frequency of the receiver. In a standby mode, power is disrupted to all modules in the receiver, the selected modules in the phase locked loop and the voltage controlled oscillator. During a transmit mode all battery saving is terminated.
    • 公开了能够调谐到多个通信信道的频率合成收发器。 收发器包括接收器和发射器部分,其耦合到合成器,其产生适当的注入信号以实现调谐。 电池节省电路产生具有预定占空比和周期的电池节省信号,并且响应于合成器中的相位检测器来中断合成器的电源,同时保持精确的调谐。 电池保护电路也对收发器做出响应。 在正常接收操作中,电池节省电路使其电池节省信号与相位检测器的保持状态同步,以将合成器中的选定模块的功率中断,而不改变接收机的注入频率。 在待机模式下,接收机中的所有模块,锁相环中的选定模块和压控振荡器的电源中断。 在发送模式期间,所有电池节电终止。