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1. 发明申请

US20070049212A1 Discrete amplitude calibration of oscillators in frequency synthesizers 有权
标题翻译：频率合成器中振荡器的离散幅度校准
公开(公告)号：US20070049212A1
公开(公告)日：2007-03-01
申请号：US11436915
申请日：2006-05-18
申请人： Jeremy Dunworth , Brett Walker
发明人： Jeremy Dunworth , Brett Walker
IPC分类号： H04B1/40 , H04B1/06
CPC分类号： H03L7/099 , H03L5/00 , H03L7/18
摘要： In one embodiment, this disclosure describes a frequency synthesizer for use in a wireless communication device, or similar device that requires precision frequency synthesis but small amounts of noise. In particular, the frequency synthesizer may include a phase locked loop (PLL) and an integrated voltage controlled oscillator (VCO). The frequency synthesizer may implement one or more amplitude calibration techniques prior to enabling the PLL. For example, an amplitude calibration unit may be used to selectively activate switched unit current sources within a tail current source of the VCO. In this manner, the amplitude the signal generated by the oscillator can be adjusted without requiring closed-loop amplitude monitoring or control.
摘要翻译：在一个实施例中，本公开描述了一种在无线通信设备中使用的频率合成器或需要精确频率合成但是具有少量噪声的类似设备。特别地，频率合成器可以包括锁相环（PLL）和集成压控振荡器（VCO）。在使能PLL之前，频率合成器可以实现一个或多个振幅校准技术。例如，幅度校准单元可用于选择性地激活VCO的尾流源内的开关单元电流源。以这种方式，可以调节由振荡器产生的信号的幅度，而不需要闭环幅度监视或控制。

2. 发明申请

US20100273442A1 JAMMER DETECTION BASED ADAPTIVE PLL BANDWIDTH ADJUSTMENT IN FM RECEIVER 有权
标题翻译：基于JAMMER检测的FM接收器中的自适应PLL带宽调整
公开(公告)号：US20100273442A1
公开(公告)日：2010-10-28
申请号：US12430106
申请日：2009-04-26
申请人： Yi Zeng , Tzu-wang Pan , I-Hsiang Lin , Jeremy Dunworth , Pushp Trikha , Rahul Apte
发明人： Yi Zeng , Tzu-wang Pan , I-Hsiang Lin , Jeremy Dunworth , Pushp Trikha , Rahul Apte
IPC分类号： H04B1/16
CPC分类号： H04B1/1027
摘要： A frequency synthesizer within an FM receiver employs a Phase-Locked Loop (PLL) to generate a Local Oscillator (LO) signal. The LO signal is supplied to a mixer. The FM receiver also includes jammer detection functionality. If no jammer is detected, then the loop bandwidth of the PLL is set to have a relatively high value, thereby favoring suppression of in-band residual FM. If a jammer is detected, then the loop bandwidth of the PLL is set to have a relatively low value, thereby favoring suppression of out-of-band SSB phase noise. By adaptively changing loop bandwidth depending on whether a jammer is detected, performance requirements on sub-circuits within the PLL can be relaxed while still satisfying in-band residual FM and out-of-band SSB phase noise requirements. By allowing the VCO of the PLL to generate more phase noise due to the adaptive changing of loop bandwidth, VCO power consumption can be reduced.
摘要翻译： FM接收机内的频率合成器采用锁相环（PLL）来产生本地振荡器（LO）信号。 LO信号提供给混频器。 FM接收机还包括干扰检测功能。如果没有检测到干扰，则PLL的环路带宽被设置为具有相对较高的值，从而有利于抑制带内剩余FM。如果检测到干扰，则将PLL的环路带宽设置为具有相对较低的值，从而有利于抑制带外SSB相位噪声。通过根据是否检测到干扰信号来自适应地改变环路带宽，可以放宽PLL内的子电路的性能要求，同时仍然满足带内剩余FM和带外SSB相位噪声要求。通过允许PLL的VCO由于环路带宽的自适应变化而产生更多的相位噪声，可以降低VCO的功耗。

3. 发明授权

US06960962B2 Local oscillator leakage control in direct conversion processes 有权
标题翻译：直接转换过程中的本地振荡器泄漏控制
公开(公告)号：US06960962B2
公开(公告)日：2005-11-01
申请号：US10020607
申请日：2001-12-10
申请人： Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
发明人： Paul E. Peterzell , David Maldonado , Kevin Gard , Puay Hoe See , Jeremy Dunworth , Gurkanwal Sahota
IPC分类号： H03L7/183 , G01N33/14 , H03D3/00 , H04B1/30 , H04B1/40 , H03B21/01 , H03L7/00 , H04B1/00
CPC分类号： H03D3/008 , G01N33/14 , H03D3/009
摘要： A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is divided by a number N to produce a signal having a divided-down frequency. The signal having the VCO frequency is then mixed with the signal having the divided-down frequency to produce an output signal having an output frequency. Local oscillator leakage is reduced. Thus, the receiver or transmitter may operate in multiple wireless communication bands and modes and meet the associated specifications.
摘要翻译：提出了一种用于在零中频（IF）接收机或发射机中产生本地振荡器（LO）频率的系统和方法。从压控振荡器（VCO）接收信号。该信号具有VCO频率。将VCO频率除以数字N以产生具有分频的信号。然后将具有VCO频率的信号与具有分频频率的信号混合，以产生具有输出频率的输出信号。本地振荡器泄漏减少。因此，接收机或发射机可以在多个无线通信频带和模式中操作并满足相关规范。

4. 发明授权

US08437721B2 Jammer detection based adaptive PLL bandwidth adjustment in FM receiver 有权
标题翻译： FM接收机中基于干扰检测的自适应PLL带宽调整
公开(公告)号：US08437721B2
公开(公告)日：2013-05-07
申请号：US12430106
申请日：2009-04-26
申请人： Yi Zeng , Tzu-wang Pan , I-Hsiang Lin , Jeremy Dunworth , Pushp Trikha , Rahul Apte
发明人： Yi Zeng , Tzu-wang Pan , I-Hsiang Lin , Jeremy Dunworth , Pushp Trikha , Rahul Apte
IPC分类号： H04B1/06 , H04B7/00
CPC分类号： H04B1/1027
摘要： A frequency synthesizer within an FM receiver employs a Phase-Locked Loop (PLL) to generate a Local Oscillator (LO) signal. The LO signal is supplied to a mixer. The FM receiver also includes jammer detection functionality. If no jammer is detected, then the loop bandwidth of the PLL is set to have a relatively high value, thereby favoring suppression of in-band residual FM. If a jammer is detected, then the loop bandwidth of the PLL is set to have a relatively low value, thereby favoring suppression of out-of-band SSB phase noise. By adaptively changing loop bandwidth depending on whether a jammer is detected, performance requirements on sub-circuits within the PLL can be relaxed while still satisfying in-band residual FM and out-of-band SSB phase noise requirements. By allowing the VCO of the PLL to generate more phase noise due to the adaptive changing of loop bandwidth, VCO power consumption can be reduced.
摘要翻译： FM接收机内的频率合成器采用锁相环（PLL）来产生本地振荡器（LO）信号。 LO信号提供给混频器。 FM接收机还包括干扰检测功能。如果没有检测到干扰，则PLL的环路带宽被设置为具有相对较高的值，从而有利于抑制带内剩余FM。如果检测到干扰，则将PLL的环路带宽设置为具有相对较低的值，从而有利于抑制带外SSB相位噪声。通过根据是否检测到干扰信号来自适应地改变环路带宽，可以放宽PLL内的子电路的性能要求，同时仍然满足带内剩余FM和带外SSB相位噪声要求。通过允许PLL的VCO由于环路带宽的自适应变化而产生更多的相位噪声，可以降低VCO的功耗。

5. 发明申请

US20060170511A1 COARSE FREQUENCY TUNING IN A VOLTAGE CONTROLLED OSCILLATOR 有权
标题翻译：电压控制振荡器中的谐波调谐
公开(公告)号：US20060170511A1
公开(公告)日：2006-08-03
申请号：US11046261
申请日：2005-01-28
申请人： Jeremy Dunworth
发明人： Jeremy Dunworth
IPC分类号： H03B5/12
CPC分类号： H03B5/1243 , H03B5/1206 , H03B5/1265 , H03B2201/0266 , H03J2200/10
摘要： Methods and apparatus are presented for performing coarse frequency tuning in a voltage controlled oscillator. The methods and apparatus are directed towards the use of a new voltage controlled oscillator comprising both a binary coding module and a thermometer coding module. The combination of the binary coding module and the thermometer coding module control a capacitance corresponding to a resonant tank which is used to coarse tune the frequency of the voltage controlled oscillator.
摘要翻译：提出了用于在压控振荡器中执行粗调频调谐的方法和装置。该方法和装置旨在使用包括二进制编码模块和温度计编码模块的新的压控振荡器。二进制编码模块和温度计编码模块的组合控制对应于用于粗调压控振荡器的频率的谐振槽的电容。

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