Communication device with a frequency compensating synthesizer and
method of providing same
    1.
    发明授权
    Communication device with a frequency compensating synthesizer and method of providing same 失效
    具有频率补偿合成器的通信装置及其提供方法

    公开(公告)号:US5856766A

    公开(公告)日:1999-01-05

    申请号:US885003

    申请日:1997-06-30

    摘要: A communication device including a plurality of frequency synthesizers (24, 28, 30). At least one of the frequency synthesizers (24) is driven with a reference frequency from a crystal oscillator (58). The at least one frequency synthesizer (24) includes a phase locked loop with a fractional-N divider (48) which is programmed by a control circuit (64) to vary as a function of temperature compensation, frequency compensation, and a frequency multiplication factor. The output (46) of the at least one frequency synthesizer (24) is used to provide a compensated reference frequency input for the remaining frequency synthesizers (28, 30). The radio provides all the frequency synthesizers (24, 28, 30) with temperature and frequency compensation using a reference frequency from a crystal oscillator (58) and only one high resolution frequency compensating synthesizer (24).

    摘要翻译: 一种包括多个频率合成器(24,28,30)的通信装置。 频率合成器(24)中的至少一个以来自晶体振荡器(58)的参考频率驱动。 所述至少一个频率合成器(24)包括具有分数N分频器(48)的锁相环,该分频器由控制电路(64)编程以根据温度补偿,频率补偿和频率倍增因子 。 所述至少一个频率合成器(24)的输出(46)用于为剩余频率合成器(28,30)提供经补偿的参考频率输入。 无线电设备使用来自晶体振荡器(58)和仅一个高分辨率频率补偿合成器(24)的参考频率来提供所有频率合成器(24,28,30)的温度和频率补偿。

    Method, device, phone and base station for providing envelope-following
for variable envelope radio frequency signals
    2.
    发明授权
    Method, device, phone and base station for providing envelope-following for variable envelope radio frequency signals 失效
    方法,设备,电话和基站,为可变包络射频信号提供包络跟踪

    公开(公告)号:US6141541A

    公开(公告)日:2000-10-31

    申请号:US1762

    申请日:1997-12-31

    摘要: A method (200) and device (100) provide an efficient linear power amplifier that generates a variable-envelope radio frequency RF signal. The method includes the steps of: A) using an efficient envelope-following unit to output a supply voltage in accordance with a variable envelope of an input baseband signal, wherein using the efficient envelope-following unit includes: 1) using a bandwidth-limiting mapping unit to determine a reference signal based on the baseband signal; and 2) using an envelope-tracking power converter to output a supply voltage, responsive to the reference signal, to the linear RF power amplifier; B) providing an RF input signal with amplitude and phase information to a linear RF power amplifier; and C) using the linear RF power amplifier to output a power-efficient amplified variable-envelope RF signal with substantially a same amplitude and phase information as the RF input signal.

    摘要翻译: 一种方法(200)和装置(100)提供一种生成可变包络射频RF信号的有效线性功率放大器。 该方法包括以下步骤:A)使用有效的包络跟随单元根据输入基带信号的可变包络输出电源电压,其中使用有效包络跟随单元包括:1)使用带宽限制 映射单元,以基于所述基带信号确定参考信号; 以及2)使用包络跟踪功率转换器将响应于所述参考信号的电源电压输出到所述线性RF功率放大器; B)向线性RF功率放大器提供具有幅度和相位信息的RF输入信号; 和C)使用线性RF功率放大器输出具有与RF输入信号基本相同的幅度和相位信息的功率有效的放大的可变包络RF信号。

    Parallel accumulator fractional-n frequency synthesizer
    3.
    发明授权
    Parallel accumulator fractional-n frequency synthesizer 失效
    并行累加器分数n频率合成器

    公开(公告)号:US5777521A

    公开(公告)日:1998-07-07

    申请号:US910000

    申请日:1997-08-12

    IPC分类号: H03L7/197

    CPC分类号: H03L7/1976

    摘要: A frequency synthesizer (10) including a synthesizer loop (12) with a fractional-N divider (14), and including a divider control circuit (18) and a combining circuit (22). The divider control circuit (18) provides a variable divide value (20) to the divider (14). The carry values of two accumulators (24, 26) having differing accumulator lengths are applied in parallel to the combining circuit (22). Each of the accumulators (24, 26) provides a portion of a desired fractional divide value (20). The combining circuit (22) also adds an integer divide value (36) to the fractional divide value (16). By coupling the accumulators (24, 26) in parallel, a high frequency resolution with minimal spurious frequencies is achieved, using a simple, low cost circuit.

    摘要翻译: 一种频率合成器(10),包括具有分数N分频器(14)的合成器环路(12),并且包括分频器控制电路(18)和组合电路(22)。 分频器控制电路(18)向分频器(14)提供可变分频值(20)。 具有不同累加器长度的两个累加器(24,26)的进位值并联施加到组合电路(22)。 每个累加器(24,26)提供期望的分数除数值(20)的一部分。 组合电路(22)还向分数除法值(16)加上整数除数值(36)。 通过并联耦合累加器(24,26),使用简单的低成本电路实现具有最小寄生频率的高频分辨率。

    Method and apparatus for determining appropriate channels for communication
    4.
    发明授权
    Method and apparatus for determining appropriate channels for communication 有权
    用于确定通信的适当信道的方法和装置

    公开(公告)号:US07483700B2

    公开(公告)日:2009-01-27

    申请号:US11536240

    申请日:2006-09-28

    IPC分类号: H04Q7/20

    摘要: During operation of a secondary communication system, cells (106) are formed by a plurality of localized nodes (104) to alert other nodes within the cell of frequencies which must be protected or otherwise avoided. All nodes within the cell monitor a differing subset of all frequencies available, and share information with respect to acceptable and protected frequencies with each other via low-power, short-range communication. Each node then forms a list of available channels for communication, and chooses a single node to report this information back to controller.

    摘要翻译: 在次要通信系统的操作期间,小区(106)由多个本地化节点(104)形成,以警告必须被保护或以其他方式避免的频率小区内的其他节点。 小区内的所有节点都监视所有可用频率的不同子集,并通过低功率,短距离通信彼此共享关于可接受和受保护频率的信息。 然后,每个节点形成用于通信的可用信道的列表,并且选择单个节点将该信息报告回控制器。

    METHOD AND APPARATUS FOR DETERMINING APPROPRIATE CHANNELS FOR COMMUNICATION
    5.
    发明申请
    METHOD AND APPARATUS FOR DETERMINING APPROPRIATE CHANNELS FOR COMMUNICATION 有权
    用于确定通信的适当通道的方法和装置

    公开(公告)号:US20080233991A1

    公开(公告)日:2008-09-25

    申请号:US11690323

    申请日:2007-03-23

    IPC分类号: H04Q7/22

    CPC分类号: H04W16/14 H04W72/02

    摘要: During operation of a secondary communication system 100, a device will perform spectrum sensing of certain channels (either by itself or as part of a group of nodes 104). When activity is found on a channel from a primary user, other devices will be notified that the channel is not available for use. The device may then modify its spectrum sensing to assist another device (or group of devices) that have not yet found activity on a different set of channels. By assigning additional channels to devices with extra capacity, the overall spectrum-sensing efficiency and performance of the communication system 100 is raised.

    摘要翻译: 在二次通信系统100的操作期间,设备将执行某些信道的频谱感测(由本身或作为一组节点104的一部分)。 当在主用户的频道上发现活动时,其他设备将被通知该频道不可用。 然后,设备可以修改其频谱感测以辅助尚未在不同的信道集合上发现活动的另一设备(或设备组)。 通过向具有额外容量的设备分配附加信道,提高了通信系统100的总体频谱感测效率和性能。

    Circuit and method of sampling an analog signal
    6.
    发明授权
    Circuit and method of sampling an analog signal 失效
    采样模拟信号的电路和方法

    公开(公告)号:US5572154A

    公开(公告)日:1996-11-05

    申请号:US498716

    申请日:1995-07-03

    IPC分类号: G11C27/02 H03K17/74 H03K17/76

    CPC分类号: G11C27/026 H03K17/74

    摘要: A sample circuit (10) maintains linear operation over frequency. A switchable diode bridge (12) passes the analog input signal when enabled to one terminal of a sample storage capacitor (14). The second terminal of the capacitor is coupled through a closed FET switch (16) to a reference node (18). Once the analog input signal is stored across the capacitor, the FET switch opens before the diode bridge disables. When the second terminal of the capacitor floats and prevents any further charge from altering the sample voltage across the capacitor. When the diode bridge is disabled, the sample voltage across the capacitor does not change. The sample voltage may be amplified and digitized for further processing in the cellular system.

    摘要翻译: 采样电路(10)在频率上保持线性运算。 当使能到样品存储电容器(14)的一个端子时,可切换二极管电桥(12)将模拟输入信号传递。 电容器的第二端子通过闭合FET开关(16)耦合到参考节点(18)。 一旦模拟输入信号存储在电容器两端,FET开关就会在二极管桥断开之前打开。 当电容器的第二端子漂移并且防止任何进一步的电荷改变电容器两端的采样电压时。 当二极管桥被禁用时,电容器两端的采样电压不会改变。 样品电压可以被放大并数字化以在蜂窝系统中进一步处理。

    Apparatus and method for operating a phase locked loop frequency
synthesizer responsive to radio frequency channel spacing
    7.
    发明授权
    Apparatus and method for operating a phase locked loop frequency synthesizer responsive to radio frequency channel spacing 失效
    响应于射频信道间隔操作锁相环频率合成器的装置和方法

    公开(公告)号:US5448763A

    公开(公告)日:1995-09-05

    申请号:US149677

    申请日:1993-11-09

    申请人: Steven F. Gillig

    发明人: Steven F. Gillig

    IPC分类号: H04B1/40 H03L7/093 H03L7/18

    CPC分类号: H03L7/093 H03L7/18

    摘要: An apparatus and method for operating a phase locked loop frequency synthesizer responsive to radio frequency channel spacing. The phase locked loop (PLL) frequency synthesizer (300) tunes a radio frequency transceiver (100) to a radio frequency channel. A processor (110) in the transceiver (100) determines the channel spacing of the radio frequency channels in a portion of a radio frequency band including the radio frequency channel, and controls the PLL frequency synthesizer (300) responsive to the determined channel spacing. The present invention advantageously provides the PLL frequency synthesizer (300) with faster lock time and lower noise.

    摘要翻译: 一种响应于射频信道间隔操作锁相环频率合成器的装置和方法。 锁相环(PLL)频率合成器(300)将射频收发器(100)调谐到射频信道。 收发器(100)中的处理器(110)确定包括射频信道在内的无线电频带的一部分中的射频信道的信道间隔,并根据确定的信道间隔控制PLL频率合成器(300)。 本发明有利地提供具有更快的锁定时间和更低噪声的PLL频率合成器(300)。

    Portable battery charger
    8.
    发明授权
    Portable battery charger 失效
    便携式电池充电器

    公开(公告)号:US4727306A

    公开(公告)日:1988-02-23

    申请号:US878896

    申请日:1986-06-26

    IPC分类号: G01R31/36 H02J7/00 H02J7/04

    摘要: A unique automatic battery charger (100) is described that recharges a battery (202) including a thermistor (206) for sensing the battery temperature. The charger (100) produces both a slow-charge current and a fast-charge current. Upon detecting the presence of the battery (202), the unique charger (100) turns on a fast-charge current produced by a switchable current source (110-113). The fast-charge current is subsequently turned off when the battery (202) is fully charged as indicated by the status of monitored temperature and voltage conditions. Comparators (180-184) are utilized to monitor these voltage and temperature conditions. According to a novel feature of the present invention, the monitored temperature thresholds are changed in response to the supply voltage. The automatic battery charging apparatus of the present invention may be advantageously utilized in a variety of applications for rapidly and safely charging batteries used in battery-operated electrical apparatus.

    摘要翻译: 描述了一种独特的自动电池充电器(100),其对包括用于感测电池温度的热敏电阻(206)的电池(202)进行再充电。 充电器(100)产生慢充电电流和快充电流。 在检测到电池(202)的存在时,唯一充电器(100)接通由可切换电流源(110-113)产生的快速充电电流。 当电池(202)充满电时,快速充电电流随后被关闭,如所监视的温度和电压条件的状态所示。 比较器(180-184)用于监测这些电压和温度条件。 根据本发明的新颖特征,监视的温度阈值响应于电源电压而改变。 本发明的自动电池充电装置可以有利地用于各种应用中,用于快速和安全地对在电池供电的电气设备中使用的电池进行充电。

    Method and apparatus for allocating spectrum
    9.
    发明授权
    Method and apparatus for allocating spectrum 有权
    分配频谱的方法和装置

    公开(公告)号:US08472390B2

    公开(公告)日:2013-06-25

    申请号:US12710490

    申请日:2010-02-23

    IPC分类号: H04W24/00

    CPC分类号: H04W72/048

    摘要: A method and apparatus for allocating spectrum within a wireless communication system is provided herein. During operation, a first base station will determine a location of a UE wishing to transmit. A database will be accessed containing wireless coverage area information for base stations with overlapping coverage with the first base station. Based on this information the first base station will determine if the UE is within an overlapping coverage area of multiple base stations. Spectrum will be assigned to the wireless equipment in a guard band, based at least in part on the determination that the UE is not within the overlapping coverage area.

    摘要翻译: 本文提供了一种用于在无线通信系统内分配频谱的方法和装置。 在操作期间,第一基站将确定希望发送的UE的位置。 将访问包含与第一基站重叠覆盖的基站的无线覆盖区域信息的数据库。 基于该信息,第一基站将确定UE是否在多个基站的重叠覆盖区域内。 至少部分地基于UE不在重叠覆盖区域内的确定,频谱将被分配给保护频带中的无线设备。