会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 依法登记的发明
    • Multi-GHz frequency divider
    • USH1199H
    • 1993-06-01
    • US706481
    • 1991-05-28
    • David S. KornCarl Deierling
    • David S. KornCarl Deierling
    • H03K3/037
    • H03K3/037
    • A frequency divider uses a single D flip-flop integrated circuit having an inverted output and an asynchronous clear input between which a feedback loop comprising a delay Tau is connected. The frequency divider receives a multi-GHz input frequency f.sub.1, and divides by any integer N to produce an output frequency f.sub.2 =f.sub.1 /N using the internal delay of the D flip-flop between input and output (CK-to-Q), and the internal delay between the asynchronous clear input to the output (CLR-to-Q). Solving for the amount of delay Tau in the feedback loop necessary to produce the desired integer, or divide ratio, N, according to a predetermined formula is also required. An integrated circuit D flip-flop manufactured by Gigabit Logic is preferably selected to provide the high input frequency capability, external to which is added the feedback loop for determining the divide ration desired. The divide ratio, or integer by which the input frequency is divided, includes the ability to divide by a non-2.sup.n number.
    • 3. 发明授权
    • Voltage-controlled oscillator with rapid tuning loop and method for
tuning same
    • 具有快速调谐回路的压控振荡器及其调谐方法
    • US5023572A
    • 1991-06-11
    • US453742
    • 1989-12-20
    • Stephen P. CaldwellDavid S. KornFrancis W. Hopwood
    • Stephen P. CaldwellDavid S. KornFrancis W. Hopwood
    • H03L7/085
    • H03L7/085
    • An oscillator circuit is coupled to receive first and second reference signals and includes a voltage-controlled oscillator for generating an oscillating signal. A difference frequency calculation circuit is coupled to the voltage-controlled oscillator to produce a count signal corresponding to a difference in frequency between the oscillating signal and the first reference signal. A feedback circuit is coupled to the difference frequency calculation circuit and coupled to receive the second reference signal which corresponds to a predetermined frequency for the oscillating signal. The feedback circuit provides a control signal as an input to the voltage-controlled oscillator to control the frequency of the oscillating signal. The method for tuning the voltage-controlled oscillator which generates the oscillating signal includes a step of calculating a difference in frequency between the oscillating signal and a first reference signal, and generating a count signal corresponding to the difference in frequency. The count signal is compared to a reference count signal corresponding to a predetermined frequency for the oscillating signal, and an error signal is generated based on the results of the comparison. The error signal and a prepositioning signal corresponding to the predetermined frequency for the oscillating signal are added to generate a control signal which is provided to the voltage-controlled oscillator to control the frequency of the oscillating signal.
    • 振荡器电路被耦合以接收第一和第二参考信号,并且包括用于产生振荡信号的压控振荡器。 差分频率计算电路耦合到压控振荡器以产生对应于振荡信号和第一参考信号之间的频率差的计数信号。 反馈电路耦合到差分频率计算电路,并被耦合以接收对应于振荡信号的预定频率的第二参考信号。 反馈电路提供控制信号作为压控振荡器的输入,以控制振荡信号的频率。 用于调谐产生振荡信号的压控振荡器的方法包括计算振荡信号和第一参考信号之间的频率差的步骤,以及产生对应于频率差的计数信号。 将计数信号与对应于振荡信号的预定频率的参考计数信号进行比较,并根据比较结果产生误差信号。 加上对应于振荡信号的预定频率的误差信号和预定位信号,以产生提供给压控振荡器以控制振荡信号的频率的控制信号。