公开(公告)号：WO2014150902A1

公开(公告)日：2014-09-25

申请号：PCT/US2014/024494

申请日：2014-03-12

Applicant: HITTITE MICROWAVE CORPORATION

Inventor： CLOUTIER, Mark, M. ,  BACHMANEK, Greg ,  PAMIR, Tolga

IPC: H03L7/16 ,  H03L7/18 ,  H03L7/181

CPC classification number: H03L7/00 ,  H03F1/30 ,  H03F3/00 ,  H03F3/195 ,  H03F3/45475 ,  H03F3/72 ,  H03F2200/451 ,  H03F2200/453 ,  H03F2200/459 ,  H03G3/348

Abstract: A fast turn on compensation system for a synthesized signal source includes a synthesized signal source coupled to a power supply and configured to generate a phase stable radio frequency (RF) output signal. A mute amplifier is coupled to the synthesized signal source and the power supply. A dummy amplifier is coupled to the mute amplifier and the power supply. A mute controller is coupled to the mute amplifier and the dummy amplifier, the mute controller is responsive to an enable signal and configured to enable the dummy amplifier and disable the mute amplifier when no RF output signal is being generated and disable the dummy amplifier and enable the mute amplifier when the RF output signal is being generated such that total power supply current delivered to the synthesized signal source and the dummy amplifier or mute amplifier is approximately constant before, during, and after enabling the mute amplifier to reduce phase disturbance of the RF output signals.

Abstract translation: 用于合成信号源的快速启动补偿系统包括耦合到电源并被配置为产生相位稳定射频（RF）输出信号的合成信号源。 静音放大器耦合到合成信号源和电源。 虚拟放大器耦合到静音放大器和电源。 静音控制器耦合到静音放大器和虚拟放大器，静音控制器响应于使能信号，并配置为使能虚拟放大器，并且在没有产生RF输出信号时禁用静音放大器，并禁用虚拟放大器并使能 静音放大器当RF输出信号被产生时，使得在使能静音放大器减少RF的相位扰动之前，期间和之后传送到合成信号源和虚拟放大器或静音放大器的总电源电流几乎恒定 输出信号。

公开(公告)号：WO2010117466A1

公开(公告)日：2010-10-14

申请号：PCT/US2010/001066

申请日：2010-04-09

Applicant: HITTITE MICROWAVE CORPORATION ,  CLOUTIER, Mark, M. ,  SHEIKH, Kashif

Inventor： CLOUTIER, Mark, M. ,  SHEIKH, Kashif

IPC: H03L1/00

CPC classification number: H03L7/1974

Abstract: A fractional-N frequency synthesizer having reduced fractional switching noise and spurious signals is provided. The synthesizer includes a voltage controlled oscillator for providing an output signal. A fractional-N divider is responsive to the voltage controlled oscillator for providing a divided output signal having fractional switching noise. A band pass filter is responsive to the fractional-N divider for reducing the fractional switching noise and non-linearities that result in spurious signals. A phase detector is responsive to a reference signal and the band pass filter for providing a control signal representative of the phase difference between the reference signal and the signal from the band pass filter. A loop filter is responsive to the phase detector for filtering the control signal to control the voltage controlled oscillator, the output of the loop filter having reduced fractional switching noise and spurious signals.

Abstract translation: 提供了具有降低的分数开关噪声和杂散信号的分数N频率合成器。 合成器包括用于提供输出信号的压控振荡器。 分数N分频器响应于压控振荡器，以提供具有分数开关噪声的分频输出信号。 带通滤波器响应分数N分频器，用于降低导致杂散信号的分数开关噪声和非线性。 相位检测器响应于参考信号和带通滤波器，用于提供表示参考信号和来自带通滤波器的信号之间的相位差的控制信号。 环路滤波器响应于相位检测器，用于对控制信号进行滤波以控制压控振荡器，环路滤波器的输出具有降低的分数开关噪声和杂散信号。