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    • 1. 发明专利
    • PLL回路、及び、動作方法
    • PLL电路,而且,操作方法
    • JP2017046031A
    • 2017-03-02
    • JP2015164582
    • 2015-08-24
    • ルネサスエレクトロニクス株式会社
    • 平工 泰之
    • H03L7/093
    • H03L7/095H03L7/0891H03L7/091H03L7/093H03L7/107H03L7/1075H03L7/183H03L7/185H03L7/18
    • 【課題】所望の性能を有するPLL回路を提供すること。 【解決手段】PLL回路100は位相差を検出する位相比較器11と、位相比較器11に帰還する信号を生成する電圧制御発振器12と、位相比較器11と電圧制御発振器12との間に配置され、比例パス20、第1の積分パス40、及び第2の積分パス30との出力を加算する加算器50を有するループフィルタ10と、を備えている。第2の積分パス30、及び第1の積分パス40は、それぞれ累積加算器、ΔΣ変調器、RCフィルタを備えている。ロック検出器36は、ロック状態の検出を検出して、第1の累積加算器42のゲインと第1のRCフィルタ45の帯域とを制御するとともに、第2のΔΣ変調器33への入力を固定値に切り替える。 【選択図】図1
    • 以提供具有所需性能的PLL电路。 PLL电路100包括相位比较器11,用于检测相位差,压控振荡器12,其生成反馈至相位比较器11的信号,设置在所述相位比较器11和压控振荡器12之间 它被提供有具有比例路径20,用于将第一积分路径40的输出和第二积分路径30,以及加法器50的环路滤波器10。 第二积分路径30,和第一积分路径40各自累加器,.DELTA..SIGMA调制器和RC滤波器。 锁定检测器36检测锁定状态的检测,并控制第一增益的带宽和蓄能器42的第一RC滤波器45,输入到第二ΔΣ调制器33 切换到一个固定值。 点域1
    • 2. 发明专利
    • Pll circuit
    • PLL电路
    • JP2014187607A
    • 2014-10-02
    • JP2013062078
    • 2013-03-25
    • Yamaha Corpヤマハ株式会社
    • SAWARA TAKUYA
    • H03L7/085H03K5/26H04L7/02
    • H03L7/08H03L7/085H03L7/0994H03L7/1075
    • PROBLEM TO BE SOLVED: To provide a digital PLL circuit that detects a phase difference with accuracy higher than normal accuracy determined by an operating clock.SOLUTION: The PLL circuit operative in synchronism with an operating clock to generate and output a generated clock synchronized with an external clock that is an input clock signal of a substantially constant period includes: a multiphase clock generation section for generating n multiphase clocks having the same frequency and different phases which include the operating clock; a frequency signal generation section for outputting a frequency signal on the basis of a phase difference signal from a phase comparator; an oscillation section for generating and outputting a clock oscillating at a frequency depending on the frequency signal; and the phase comparator for, from a result of measuring a time difference between a rise or fall time of the input external clock and a rise or fall time of the clock generated by the oscillation section on the basis of the multiphase clocks, outputting the phase difference signal indicating the time difference.
    • 要解决的问题:提供一种数字PLL电路,其以比由操作时钟确定的正常精度高的精度检测相位差。解决方案:PLL电路与操作时钟同步地产生并输出与 作为基本恒定周期的输入时钟信号的外部时钟包括:多相时钟产生部分,用于产生具有相同频率和不同相位的n个多相时钟,包括操作时钟; 频率信号生成部,其根据来自相位比较器的相位差信号输出频率信号; 振荡部分,用于产生和输出以取决于频率信号的频率振荡的时钟; 以及相位比较器,用于根据多相时钟测量输入外部时钟的上升或下降时间与由振荡部产生的时钟的上升或下降时间之间的时间差的结果,输出相位 差分信号指示时差。
    • 5. 发明专利
    • Pll circuit
    • PLL电路
    • JP2008042810A
    • 2008-02-21
    • JP2006217994
    • 2006-08-10
    • Fujitsu Ltd富士通株式会社
    • FURUYAMA YOSHITONAKAMUTA HIROSHI
    • H03L7/199
    • H03L7/093H03L7/085H03L7/1075H03L7/199
    • PROBLEM TO BE SOLVED: To provide a PLL circuit where a pull-in time is shortened.
      SOLUTION: A frequency divider 18 with resetting to which a second clock CLK2 of a frequency which is N×Y times as high as that of a first clock CLK1 resets frequency division in response to the stop of an input clock CLKIN detected by a disconnection detection circuit 17. In response to the detection of inputting the input clock CLKIN again by the disconnection detection circuit 17, the frequency divider 18 starts frequency division, generates a third clock CLK3, and inputs it to a phase comparator 12. N is a positive integer including 1, and Y is a positive integer of ≥2.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种缩短引入时间的PLL电路。 解决方案:具有复位的分频器18,与第一时钟CLK1的N×Y倍的频率的第二时钟CLK2的频率重新分别响应于由 断开检测电路17.响应于由断开检测电路17再次输入输入时钟CLKIN的检测,分频器18开始分频,产生第三时钟CLK3,并将其输入到相位比较器12.N是 包含1的正整数,Y是≥2的正整数。 版权所有(C)2008,JPO&INPIT
    • 6. 发明专利
    • Pll circuit and semiconductor device
    • PLL电路和半导体器件
    • JP2007228142A
    • 2007-09-06
    • JP2006045306
    • 2006-02-22
    • Fujitsu Ltd富士通株式会社
    • KOTADO KENICHIMATSUDA ATSUSHI
    • H03L7/093
    • H03L7/093H03L7/1075
    • PROBLEM TO BE SOLVED: To provide a PLL circuit and a semiconductor device which allow the power consumption thereof to be prevented from increasing without making miniaturization of a semiconductor integrated circuit difficult even when a power supply voltage is comparatively low. SOLUTION: The PLL circuit includes: a phase comparator for receiving an input signal and a feedback signal; a charge pump controlled by an output of the phase comparator; a low pass filter section for receiving an output of the charge pump; a current controlled oscillator controlled by an output of the low pass filter section; and a frequency divider for frequency-dividing an output of the current controlled oscillator to output the feedback signal, wherein the low pass filter section includes an amplifier for receiving an output of the charge pump and a reference voltage, and a circuit part comprising a capacitor and a resistor and receiving the output of the charge pump and an output of the amplifier. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:即使当电源电压相对较低时,提供一种PLL电路和半导体器件,其允许在不使半导体集成电路小型化的情况下难以增加其功耗。 解决方案:PLL电路包括:相位比较器,用于接收输入信号和反馈信号; 由相位比较器的输出控制的电荷泵; 低通滤波器部分,用于接收电荷泵的输出; 由低通滤波器部分的输出控制的电流控制振荡器; 以及用于对所述电流控制振荡器的输出进行分频以输出所述反馈信号的分频器,其中所述低通滤波器部分包括用于接收所述电荷泵的输出的放大器和参考电压,以及包括电容器 和电阻器,并接收电荷泵的输出和放大器的输出。 版权所有(C)2007,JPO&INPIT