公开(公告)号：US20230087145A1

公开(公告)日：2023-03-23

申请号：US17481666

申请日：2021-09-22

Applicant: QUALCOMM Incorporated

Inventor： Jianwen YE ,  Bo SUN ,  Cheng ZHONG

IPC: H03K5/00 ,  H03K5/01 ,  H03K19/20 ,  H03L7/081 ,  H04B1/40 ,  H04L12/40

Abstract: A low-power clock generation circuit has a phase generator that receives an input clock signal and uses the input clock signal to generate multiple intermediate clock signals with different phase shifts, a phase rotator circuit that outputs phase-adjusted clock signals, a frequency doubler circuit that receives a plurality of the phase-adjusted clock signals and outputs two frequency-doubled clock signals having a 180° phase difference, and a quadrature clock generation circuit that receives the two frequency-doubled clock signals and provides four output signals that include in-phase and quadrature versions of the two frequency-doubled clock signals.

公开(公告)号：US20160099678A1

公开(公告)日：2016-04-07

申请号：US14507775

申请日：2014-10-06

Applicant: QUALCOMM Incorporated

Inventor： Xiaohua KONG ,  Deqiang SONG ,  Zhi ZHU ,  Cheng ZHONG

IPC: H03B5/12 ,  H03L7/099

CPC classification number: H03L7/099 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03C3/0925 ,  H03C3/0991 ,  H03L7/103 ,  H03L2207/06

Abstract: In one aspect, a VCO is provided. The VCO includes an inductor, a voltage-controlled capacitive element configured to operate with the inductor to generate an oscillating signal, a voltage supply configured to provide a plurality of voltages to the voltage-controlled capacitive element in a calibration mode, and a control circuit configured to store frequency information indicating frequencies of the oscillating signal in response to the plurality of voltages being provided to the voltage-controlled capacitive element. In another aspect, a PLL is provided. The PLL includes means for selecting, in an open loop configuration, a capacitance of a capacitor based on a target frequency and means for selecting, in a closed loop configuration, an operation voltage of a voltage-controlled capacitive element based on the capacitance of the capacitor.

Abstract translation: 在一个方面，提供VCO。 VCO包括电感器，被配置为与电感器一起工作以产生振荡信号的电压控制电容元件，配置成在校准模式下向压控电容元件提供多个电压的电压源，以及控制电路 被配置为存储响应于提供给所述压控电容元件的所述多个电压的振荡信号的频率的频率信息。 在另一方面，提供PLL。 PLL包括用于基于目标频率在开环配置中选择电容器的电容的装置，以及用于在闭环配置中基于电容的电容来选择压控电容元件的操作电压的装置 电容器。