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31. 发明授权

US06313707B1 Digital phase-locked loop with pulse controlled charge pump 有权
标题翻译：带脉冲控制电荷泵的数字锁相环
公开(公告)号：US06313707B1
公开(公告)日：2001-11-06
申请号：US09188194
申请日：1998-11-09
申请人： Jonathan H. Fischer , Wenzhe Luo , Zhigang Ma
发明人： Jonathan H. Fischer , Wenzhe Luo , Zhigang Ma
IPC分类号： H03L7093
CPC分类号： H03L7/107 , H03L7/0896 , H03L7/0898 , H03L7/1072 , H03L7/18
摘要： A digital phase locked loop includes a digital phase detector which provides a magnitude control signal to adjust the step size of up and down adjustments in the phase/frequency of a digitally controlled oscillator, resulting in shorter lock-in or acquisition time and smaller jitter as compared to conventional digital phase locked loop devices. In the disclosed embodiments, the digital phase detector includes multiple bit shift registers in both the up and down directions to count or measure a number of up or down minimum width pulses and provide a pulse magnitude control based on the value of the shift registers to the digitally controlled oscillator. The digitally controlled oscillator includes a charge pump and voltage controlled oscillator. In one embodiment, the charge pump provides programmable control over its output current pulses to a capacitor which controls the output frequency of the voltage controlled oscillator.
摘要翻译：数字锁相环包括数字相位检测器，其提供幅度控制信号以调节数字控制振荡器的相位/频率中的上下调节的步长，导致更短的锁定或采集时间以及更小的抖动，如与传统的数字锁相环装置相比。在所公开的实施例中，数字相位检测器在上下方向上包括多个位移寄存器，以对上或下最小宽度脉冲的数目进行计数或测量，并且基于移位寄存器的值提供脉冲幅度控制数控振荡器。数字控制振荡器包括电荷泵和压控振荡器。在一个实施例中，电荷泵将其输出电流脉冲的可编程控制提供给控制压控振荡器的输出频率的电容器。

32. 发明授权

US06239510B1 Reduced impact power up/down mode in electrical circuits 有权
标题翻译：降低电路中的冲击功率上/下模式
公开(公告)号：US06239510B1
公开(公告)日：2001-05-29
申请号：US09359203
申请日：1999-07-22
申请人： Kouros Azimi , Bahram G. Kermani , Jonathan H. Fischer
发明人： Kouros Azimi , Bahram G. Kermani , Jonathan H. Fischer
IPC分类号： H02J100
CPC分类号： H02J1/14 , Y10T307/461
摘要： An apparatus and method for reducing variations in a supply voltage signal. The voltage signal which powers a circuit is regulated by adding or removing a series of redundant loads to the circuit. The redundant loads are normally not connected to the circuit. However, when one of the loads of the circuit is switched out of the circuit, one or more of the redundant loads are switched into the circuit, and then removed gradually from the circuit. When one of the loads of the circuit is to be switched into the circuit, one or more of the redundant loads are switched into the circuit first, then switched out of the circuit when the load is switched in. Thus, the voltage supply sees almost the same load during a turn-on and turn-off transition period, and variations in the voltage signal are reduced.
摘要翻译：一种用于减小电源电压信号变化的装置和方法。对电路供电的电压信号通过向电路中添加或删除一系列冗余负载来调节。冗余负载通常不连接到电路。然而，当电路的一个负载从电路切换出来时，一个或多个冗余负载被切换到电路中，然后逐渐从电路中移除。当电路中的一个负载切换到电路中时，首先将一个或多个冗余负载切换到电路中，然后在负载切换时切换到电路中。因此，电源几乎可以看到在导通和关断过渡期间的相同负载以及电压信号的变化减小。

33. 发明授权

US5039963A Method for reducing signal-dependent distortion in switched-capacitor filters or the like 失效
标题翻译：用于减少开关电容滤波器等中的信号相关失真的方法
公开(公告)号：US5039963A
公开(公告)日：1991-08-13
申请号：US471170
申请日：1990-01-26
申请人： Jonathan H. Fischer
发明人： Jonathan H. Fischer
IPC分类号： H01H9/54 , H03H19/00 , H03K17/00
CPC分类号： H03H19/004
摘要： A method of switching a switched-capacitor circuit to reduce signal-dependent distortion resulting from the switching operation. Two single-pole, double-throw switches in the array, having the switched capacitor coupling between to the common terminals thereof, are alternately switched without the use of an intermediate (no-make) state.

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