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    • 2. 发明申请
    • RADIO FREQUENCY MODULATING CIRCUIT, AND TRANSMITTER HAVING THE SAME
    • 无线电频率调制电路,以及具有相同功能的发射机
    • US20100195765A1
    • 2010-08-05
    • US12472067
    • 2009-05-26
    • Tsung-Hsien LINYao-Hong LIU
    • Tsung-Hsien LINYao-Hong LIU
    • H04L27/20
    • H04L27/2092
    • A radio frequency modulating circuit of a transmitter includes a phase multiplexer including a plurality of phase followers each coupled to a selector and operating in accordance with a corresponding pair of complementary-level carrier signals received thereby. The selector is operable to enable conduction of one of the phase followers therethrough in response to a data sequence modulated from a data stream by a phase shift keying modulating circuit. A conversion amplifier is operable in accordance with the complementary-level carrier signals of a conducting one of the phase followers so as to output a phase-modulated output corresponding to the data stream. The phase-modulated output is amplified by a power amplifier and is transmitted through an antenna.
    • 发射机的射频调制电路包括相位多路复用器,该相位多路复用器包括多个相位跟随器,每个相位跟随器分别耦合到选择器并根据从其接收的对应的互补电平载波信号进行操作。 选择器可操作以响应于通过相移键控调制电路从数据流调制的数据序列,使一个相位跟随器通过其中。 转换放大器可以根据相位跟随器中的导通一个的互补电平载波信号进行操作,以输出对应于数据流的相位调制输出。 相位调制输出由功率放大器放大并通过天线传输。
    • 3. 发明申请
    • BROADBAND DELTA-SIGMA ADC MODULATOR LOOP WITH DELAY COMPENSATION
    • 宽带DELTA-SIGMA ADC调制器环路延时补偿
    • US20120280843A1
    • 2012-11-08
    • US13226545
    • 2011-09-07
    • Yi-Lin TSAITsung-Hsien LIN
    • Yi-Lin TSAITsung-Hsien LIN
    • H03M3/02H03M1/12
    • H03M3/37H03M3/458
    • An exemplary delta-sigma modulator loop applied to convert a continuous-time input signal into a discrete-time output signal. The delta-sigma modulator loop includes a conversion unit, a sampling unit, a quantization unit, a compensation unit, and a digital-to-analog converter unit. The conversion unit converts an error signal relevant to the input signal through a transfer function to generate a converted signal. The sampling unit samples the converted signal to generate a sampling signal. The quantization unit quantizes the sampling signal to obtain the output signal. The compensation unit receives the output signal and compensates a time delay of the received output signal to generate a compensation signal. The digital-to-analog converter unit is electrically coupled to the compensation unit and the conversion unit to convert the compensation signal to generate a feedback signal for regulating the error signal.
    • 应用于将连续时间输入信号转换成离散时间输出信号的示例性Δ-Σ调制器环路。 Δ-Σ调制器环路包括转换单元,采样单元,量化单元,补偿单元和数模转换器单元。 转换单元通过传递函数转换与输入信号相关的误差信号,以生成转换信号。 采样单元对转换的信号进行采样以产生采样信号。 量化单元量化采样信号以获得输出信号。 补偿单元接收输出信号并补偿接收的输出信号的时间延迟以产生补偿信号。 数模转换器单元电耦合到补偿单元和转换单元以转换补偿信号以产生用于调节误差信号的反馈信号。