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1.发明授权Frequency synthesizer apparatus and methods for improving capacitor code search accuracy using LSB modulation 有权使用LSB调制改善电容码搜索精度的频率合成器装置和方法公开(公告)号：US09048850B2
公开(公告)日：2015-06-02
申请号：US13797356
申请日：2013-03-12
Applicant: QUALCOMM Incorporated
Inventor： Abbas Komijani , Emmanouil Terrovitis , Justin A. Hwang
CPC classification number: H03L7/103 , H03J5/244 , H03J2200/10 , H03L7/087 , H03L7/10 , H03L7/113 , H03L7/181 , H03L2207/06
Abstract: A frequency synthesizer is disclosed that includes an oscillator having an output to deliver a signal of a controllable frequency. The oscillator includes a capacitor bank responsive to an N-bit control signal to exhibit a capacitance. The oscillator output frequency is based on the capacitance. Control logic generates the N-bit control signal and determines each bit of the N-bit control signal through a binary search step and a modulation of a least-significant-bit (LSB) of the N-bit control signal. The LSB modulation, combined with the binary search for each bit, results in a higher accuracy frequency estimation.
Abstract translation: 公开了一种频率合成器，其包括具有输出以输送可控频率的信号的振荡器。 振荡器包括响应于N位控制信号以显示电容的电容器组。 振荡器输出频率基于电容。 控制逻辑产生N位控制信号，并且通过二进制搜索步骤和N位控制信号的最低有效位（LSB）的调制来确定N位控制信号的每个位。 LSB调制与每个比特的二进制搜索相结合，导致更高的频率估计精度。
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公开(公告)号：US09160461B2
公开(公告)日：2015-10-13
申请号：US13738917
申请日：2013-01-10
Applicant: QUALCOMM Incorporated
Inventor： Justin A. Hwang , David Su
CPC classification number: H04B15/00 , H04B1/0475 , H04B15/06
Abstract: A frequency source, such as for a wireless communications device, configured to have a duty cycle adjustment. A selected harmonic spur resulting from operation of the frequency source at one duty cycle may be avoided or minimized by operating the frequency source at a second duty cycle. Determination of the appropriate duty cycle may be based on measuring the amplitude of the harmonic spur as it appears in the output of a receive chain of the wireless device. Alternatively, the duty cycle may be set to desired value to avoid or minimize a given harmonic.
Abstract translation: 诸如用于无线通信设备的频率源被配置为具有占空比调整。 可以通过在第二占空比下操作频率源来避免或最小化在一个占空比下由频率源的操作产生的选择的谐波杂散。 确定适当的占空比可以基于测量在无线设备的接收链的输出中出现的谐波杂散的振幅。 或者，可以将占空比设置为期望值以避免或最小化给定的谐波。
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3.发明申请FREQUENCY SYNTHESIZER APPARATUS AND METHODS FOR IMPROVING CAPACITOR CODE SEARCH ACCURACY USING LSB MODULATION 有权频率合成器装置和使用LSB调制改进电容器代码搜索精度的方法公开(公告)号：US20140002205A1
公开(公告)日：2014-01-02
申请号：US13797356
申请日：2013-03-12
Applicant: QUALCOMM INCORPORATED
Inventor： Abbas Komijani , Emmanouil Terrovitis , Justin A. Hwang
IPC: H03L7/00
CPC classification number: H03L7/103 , H03J5/244 , H03J2200/10 , H03L7/087 , H03L7/10 , H03L7/113 , H03L7/181 , H03L2207/06
Abstract: A frequency synthesizer is disclosed that includes an oscillator having an output to deliver a signal of a controllable frequency. The oscillator includes a capacitor bank responsive to an N-bit control signal to exhibit a capacitance. The oscillator output frequency is based on the capacitance. Control logic generates the N-bit control signal and determines each bit of the N-bit control signal through a binary search step and a modulation of a least-significant-bit (LSB) of the N-bit control signal. The LSB modulation, combined with the binary search for each bit, results in a higher accuracy frequency estimation.
Abstract translation: 公开了一种频率合成器，其包括具有输出以输送可控频率的信号的振荡器。 振荡器包括响应于N位控制信号以显示电容的电容器组。 振荡器输出频率基于电容。 控制逻辑产生N位控制信号，并且通过二进制搜索步骤和N位控制信号的最低有效位（LSB）的调制来确定N位控制信号的每个位。 LSB调制与每个比特的二进制搜索相结合，导致更高的频率估计精度。
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