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    • 11. 发明授权
    • Multi-mode amplifier system
    • 多模放大器系统
    • US07043213B2
    • 2006-05-09
    • US10603880
    • 2003-06-24
    • Ian RobinsonFrank Winter
    • Ian RobinsonFrank Winter
    • H03F3/38
    • H03F1/0222H03F1/025H03F1/3241H03F2200/331
    • An amplifier system is provided that switches between a linear mode of operation, an envelope tracking mode of operation and a polar mode of operation. The amplifier system switches between modes of operation based upon a characteristic of an input signal relative to a first threshold level and a second threshold level. A mode selector selects the operation mode by transmitting an amplitude modulated signal plus a variable headroom voltage to a supply terminal of a power amplifier during the envelope tracking mode, an amplitude modulated signal to the supply terminal and phase modulated input signal during the polar mode and a substantially constant amplitude signal to the supply terminal during the linear mode.
    • 提供放大器系统,其在线性操作模式,包络跟踪操作模式和极操作模式之间切换。 放大器系统基于输入信号相对于第一阈值电平和第二阈值电平的特性来切换操作模式。 模式选择器通过在包络跟踪模式期间向功率放大器的电源端发送幅度调制信号加可变净空电压,在极坐标模式期间向供电端发送调幅信号和相位调制输入信号,从而选择操作模式,以及 在线性模式期间向供电端子施加基本恒定的振幅信号。
    • 14. 发明授权
    • Frequency agile exciter
    • 频率敏捷激励器
    • US07146144B2
    • 2006-12-05
    • US10689296
    • 2003-10-20
    • Ian RobinsonJack MacekFrank Winter
    • Ian RobinsonJack MacekFrank Winter
    • H04B7/00H04B1/06H04B1/26
    • H03M3/50H03M7/3017H03M7/3024
    • Systems and methods are provided for providing high dynamic range operation over a variable range of frequencies. A delta-sigma modulator, having associated frequency characteristics, produces a digital output signal. A digital-to-analog converter converts the digital output signal into an analog signal. A clock circuit provides a clock signal to the delta-sigma modulator and the digital-to-analog converter. A frequency control controls one or more of the clock circuit, the delta-sigma modulator, and the digital-to-analog converter to alter the frequency characteristics of the delta-sigma modulator. A filter circuit can provide one or more passbands to one or more downstream amplifiers ensuring that out of band quantization noise is removed before amplification.
    • 提供了用于在可变频率范围内提供高动态范围操作的系统和方法。 具有相关频率特性的Δ-Σ调制器产生数字输出信号。 数模转换器将数字输出信号转换为模拟信号。 时钟电路向Δ-Σ调制器和数模转换器提供时钟信号。 频率控制控制时钟电路,Δ-Σ调制器和数 - 模转换器中的一个或多个以改变Δ-Σ调制器的频率特性。 滤波器电路可以向一个或多个下游放大器提供一个或多个通带,确保在放大之前去除带外量化噪声。
    • 17. 发明申请
    • DELTA-SIGMA DIGITAL-TO-ANALOG CONVERTER ASSEMBLY
    • DELTA-SIGMA数字到模拟转换器总成
    • US20050099327A1
    • 2005-05-12
    • US10706723
    • 2003-11-12
    • Ian RobinsonFrank Winter
    • Ian RobinsonFrank Winter
    • H03F3/24H03M3/02H03M3/00
    • H03F3/24H03F2200/331H03M3/50H04B2001/0408
    • Systems and methods are provided for converting a digital signal into an analog signal. A digital-to-analog converter assembly comprises a delta-sigma modulator, a digital-to-analog converter, an analog filter, and a comb filter. The delta-sigma modulator processes a digital input signal to produce a digital output signal having at least one associated high dynamic range frequency band. The digital-to-analog converter converts the digital output signal into an analog output signal having at least one associated high dynamic range frequency band. The associated high dynamic range bands have respective frequency characteristics. An analog filter assembly filters the analog signal. The analog filter has at least one passband. A comb filter assembly attenuates the analog signal output of the filter assembly to improve signal to noise ratio.
    • 提供了将数字信号转换为模拟信号的系统和方法。 数模转换器组件包括Δ-Σ调制器,数 - 模转换器,模拟滤波器和梳状滤波器。 Δ-Σ调制器处理数字输入信号以产生具有至少一个相关联的高动态范围频带的数字输出信号。 数模转换器将数字输出信号转换为具有至少一个相关联的高动态范围频带的模拟输出信号。 相关联的高动态范围带具有相应的频率特性。 模拟滤波器组件对模拟信号进行滤波。 模拟滤波器至少有一个通带。 梳状滤波器组件衰减滤波器组件的模拟信号输出以提高信噪比。
    • 19. 发明授权
    • Transaction recovery in a transaction processing computer system employing multiple transaction managers
    • 采用多个事务管理器的事务处理计算机系统中的事务恢复
    • US09165025B2
    • 2015-10-20
    • US12897123
    • 2010-10-04
    • Simon J. MapleIan Robinson
    • Simon J. MapleIan Robinson
    • G06F7/00G06F17/30G06F11/20
    • G06F11/1471G06F9/466G06F11/2028G06F11/2035G06F11/2046G06F17/30371G06F17/30377G06F17/30566G06F2201/84
    • A technique for transaction recovery by one transaction manager of another transaction manager's transactions in which each transaction manager is adapted to manage two phase commit transactional operations on transactional resources and to record commit or rollback decisions in a transaction recovery log. The recovery transaction manager detects apparent unavailability of the another transaction manager for transaction processing and initiates a transaction recovery process for the another transaction manager's transactions. This process also determines whether any of the transactions of the another transaction manager have all respective resources prepared to commit without there yet being a pending commit decision record in the another transaction manager's recovery log. If so, the recovery transaction manager writes a rollback record indicating an intention to roll back the identified transaction, in the another transaction manager's recovery log provided no commit decision record has been recorded.
    • 一种交易管理器对另一个事务管理器事务进行事务恢复的技术,其中每个事务管理器适用于管理事务资源上的两个阶段提交事务操作,并在事务恢复日志中记录提交或回滚决策。 恢复事务管理器检测另一个事务管理器的事务处理的显着不可用性,并为另一个事务管理器的事务启动事务恢复过程。 该过程还确定另一事务管理器的任何事务是否具有准备提交的所有相应资源,而在另一事务管理器的恢复日志中尚未存在待决提交决定记录。 如果是这样,则恢复事务管理器在另一个事务管理器的恢复日志中写入一个回滚记录,该回滚记录指示回滚所识别的事务的意图,前提是没有记录提交决定记录。