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1. 发明申请

US20080007345A1 ADJUSTMENT OF PLL BANDWIDTH FOR JITTER CONTROL USING FEEDBACK CIRCUITRY 失效
公开(公告)号：US20080007345A1
公开(公告)日：2008-01-10
申请号：US11425752
申请日：2006-06-22
申请人： Hayden C. Cranford , Ram Kelkar , Anjali R Malladi , Martin L. Schmatz , Nina A. Shah
发明人： Hayden C. Cranford , Ram Kelkar , Anjali R Malladi , Martin L. Schmatz , Nina A. Shah
IPC分类号： H03L7/00
CPC分类号： H03L7/02
摘要： Jitter method and control circuit for a circuit block in a transceiver system having a phase lock loop circuit which includes an oscillator, a charge pump connected to the oscillator to add or subtract charge to or from said oscillator, and a low pass filter connected to said charge pump are provided. Circuitry is connected to the output of the oscillator and the input of the charge pump to control the amount of charge added to or subtracted from the charge pump to control the bandwidth output by the oscillator and thereby reduce jitter in the phase lock circuit.

2. 发明授权

US07391271B2 Adjustment of PLL bandwidth for jitter control using feedback circuitry 失效
标题翻译：使用反馈电路调整抖动控制的PLL带宽
公开(公告)号：US07391271B2
公开(公告)日：2008-06-24
申请号：US11425752
申请日：2006-06-22
申请人： Hayden C Cranford, Jr. , Ram Kelkar , Anjali R Malladi , Martin L Schmatz , Nina A Shah
发明人： Hayden C Cranford, Jr. , Ram Kelkar , Anjali R Malladi , Martin L Schmatz , Nina A Shah
IPC分类号： H03L7/00
CPC分类号： H03L7/02
摘要： Jitter method and control circuit for a circuit block in a transceiver system having a phase lock loop circuit which includes an oscillator, a charge pump connected to the oscillator to add or subtract charge to or from said oscillator, and a low pass filter connected to said charge pump are provided. Circuitry is connected to the output of the oscillator and the input of the charge pump to control the amount of charge added to or subtracted from the charge pump to control the bandwidth output by the oscillator and thereby reduce jitter in the phase lock circuit.
摘要翻译：具有锁相环电路的收发器系统中的电路块的抖动方法和控制电路，该锁相环电路包括振荡器，连接到所述振荡器的电荷泵以向所述振荡器加上或从所述振荡器加减电荷，以及连接到所述振荡器的低通滤波器提供电荷泵。电路连接到振荡器的输出端和电荷泵的输入端，以控制从电荷泵加到或减去的电荷量，以控制振荡器的带宽输出，从而减少锁相电路中的抖动。

3. 发明授权

US07710206B2 Design structure for improved current controlled oscillation device and method having wide frequency range 失效
标题翻译：改进的电流控制振荡装置的设计结构和频率范围宽的方法
公开(公告)号：US07710206B2
公开(公告)日：2010-05-04
申请号：US12054563
申请日：2008-03-25
申请人： Ram Kelkar , Anjali R Malladi
发明人： Ram Kelkar , Anjali R Malladi
IPC分类号： H03K3/03 , H03L7/089 , H03L7/099
CPC分类号： H03L7/0995 , H03L7/0891 , H03L2207/06
摘要： A design structure embodied in a machine readable medium used in a design process includes a current controlled, phase locked loop device having a phase detector configured to compare a reference frequency to an output frequency of a current controlled oscillator (ICO), a charge pump coupled to the phase detector and a low pass filter coupled to the charge pump. A voltage to current (V to I) converter is coupled to the low pass filter, providing an output current for integral control of the ICO. A control circuit is coupled to the ICO, and receives increment and decrement outputs of the phase detector, wherein the control circuit is configured to provide proportional control of the ICO through an amount of bias current applied thereto.
摘要翻译：体现在设计过程中使用的机器可读介质中的设计结构包括电流控制的锁相环装置，其具有相位检测器，其被配置为将参考频率与电流控制振荡器（ICO）的输出频率进行比较，电荷泵耦合耦合到电荷泵的相位检测器和低通滤波器。电压到电流（V至I）转换器耦合到低通滤波器，为ICO的整体控制提供输出电流。控制电路耦合到ICO，并且接收相位检测器的增量和减量输出，其中控制电路被配置为通过施加到其上的偏置电流量来提供ICO的比例控制。

4. 发明授权

US07928812B2 Automated tuning in wide range multi-band VCO with internal reset concept 有权
标题翻译：在具有内部复位概念的宽范围多频带VCO中进行自动调谐
公开(公告)号：US07928812B2
公开(公告)日：2011-04-19
申请号：US12477945
申请日：2009-06-04
申请人： Anjali R Malladi , Pradeep Thiagarajan
发明人： Anjali R Malladi , Pradeep Thiagarajan
IPC分类号： H03B1/00
CPC分类号： H03L7/099
摘要： Circuits and methods for automated real-time tuning of wide range frequency/delay voltage controlled oscillators (VCO) using a reset mechanism, to account for run-time variations such as power supply, temperature, reference clock frequency and input slew drift etc is described. It finds extensive applications in wide range, multi frequency band phase and delay locked loops. In one embodiment, an automated Jump-Down band switching structure and method for use in VCOs with a plurality of frequency bands is described. This involves monitoring the VCO's analog control voltage signal until it reaches a predetermined lower limit, at which time band switching to an overlapping lower frequency band is triggered by an internally generated reset signal, while simultaneously charging the analog control voltage to a limit in a pre-determined range of the lower band, to avoid phase detector malfunctions in the PLL/DLL system at lower control voltages during band switch.
摘要翻译：描述使用复位机制对宽范围频率/延迟电压控制振荡器（VCO）进行自动实时调谐的电路和方法，以解决运行时间变化，如电源，温度，参考时钟频率和输入摆幅漂移等。。它广泛应用于宽范围，多频段相位和延迟锁定环路。在一个实施例中，描述了一种在具有多个频带的VCO中使用的自动跳跃频带切换结构和方法。这涉及监视VCO的模拟控制电压信号，直到其达到预定的下限，在此时间段切换到重叠的较低频带由内部产生的复位信号触发，同时将模拟控制电压充电到预先的限制确定低频段的范围，以避免频段切换期间较低控制电压下PLL / DLL系统中的相位检测器故障。

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