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    • 6. 发明授权
    • Method and system for calibration of a tank circuit in a phase lock loop
    • 在锁相环中调节电路的方法和系统
    • US07609122B2
    • 2009-10-27
    • US11868306
    • 2007-10-05
    • Heng-Yu JianZhiwei XuYi-Cheng WuCharles Chien
    • Heng-Yu JianZhiwei XuYi-Cheng WuCharles Chien
    • H03B5/08
    • H03L7/10H03L7/099
    • A phase lock loop (PLL) includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the PLL. A capacitance profile for setting the frequency of the PLL at a process comer is stored. At power up, or after an idle time, a calibration is performed at two frequencies. The capacitances of operating the phase lock loop at the two frequencies are determined and stored. During a frequency change, the capacitance of operating the PLL is determined from the capacitance profile and stored capacitances. The capacitance of the PLL is presumed to change linearly with frequency and the two stored capacitances are used to determine a difference capacitance at the selected frequency by linear interpolating between the two stored capacitances, which is added to the capacitance in the capacitance profile at the selected frequency to generate an operating capacitance.
    • 锁相环(PLL)包括用于通过制造包括PLL的集成电路的过程变化校准用于电容变化的振荡电路的校准回路。 存储用于在处理角设定PLL的频率的电容分布。 在上电或空闲时间后,以两个频率进行校准。 确定并存储在两个频率下操作锁相环的电容。 在频率变化期间,操作PLL的电容由电容曲线和存储的电容确定。 假设PLL的电容随频率线性变化,并且两个存储的电容用于通过在所选择的电容分布中的电容相加的两个存储的电容之间的线性内插来确定所选频率处的差电容, 产生一个工作电容的频率。
    • 7. 发明申请
    • METHOD AND SYSTEM FOR CALIBRATION OF A TANK CIRCUIT IN A PHASE LOCK LOOP
    • 用于在相位锁定环中校准电路的方法和系统
    • US20090091396A1
    • 2009-04-09
    • US11868306
    • 2007-10-05
    • Heng-Yu JianZhiwei XuYi-Cheng WuCharles Chien
    • Heng-Yu JianZhiwei XuYi-Cheng WuCharles Chien
    • H03L7/099H03L7/08
    • H03L7/10H03L7/099
    • A phase lock loop includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the phase lock loop. A capacitance profile for setting the frequency of the phase lock loop at a process corner, such as a typical process corner is stored in driver software or a host processor. At power up, or after an idle time, a calibration is performed at two frequencies. The capacitances of operating the phase lock loop at the two frequencies are determined and stored. During a frequency change, the capacitance of operating the phase lock loop is determined from the capacitance profile and stored capacitances. In one aspect, the capacitance of the phase lock loop is presumed to change linearly with frequency and the two stored capacitances are used to determine a difference capacitance at the selected frequency by linear interpolating between the two stored capacitances. The interpolated difference capacitance is added to the capacitance in the capacitance profile at the selected frequency to generate an operating capacitance. The capacitance of a tank circuit of the phase lock loop is set to the operating capacitance.
    • 锁相环包括用于通过制造包括锁相环的集成电路的过程变化来校准用于电容变化的储能电路的校准回路。 用于设置过程角(例如典型过程角)的锁相环频率的电容分布存储在驱动软件或主机处理器中。 在上电或空闲时间后,以两个频率进行校准。 确定并存储在两个频率下操作锁相环的电容。 在频率变化期间,根据电容曲线和存储的电容确定操作锁相环的电容。 在一个方面,假设锁相环的电容随频率线性变化,并且两个存储的电容用于通过两个存储电容之间的线性内插来确定所选频率处的差电容。 内插差分电容以所选频率加到电容分布中的电容上,以产生一个工作电容。 锁相环的电路电容设定为工作电容。
    • 8. 发明授权
    • Low complexity synchronization for wireless transmission
    • 无线传输的低复杂度同步
    • US07394870B2
    • 2008-07-01
    • US10407572
    • 2003-04-04
    • Charles ChienDavid Hsueh-Chia Chien
    • Charles ChienDavid Hsueh-Chia Chien
    • H04L27/00
    • H04L7/042H04L7/0337
    • A receiver, system and method for providing symbol timing recovery that allows for inexpensive and low-complexity synchronization for communication systems. A receiver receives a signal including digital data in the form of packets that is transmitted from a transmitter. The receiver uses information contained in each of the packets to align a phase of the receiver clock with a phase of the transmitter clock. The receiver further controls a sampling device such that the in-phase (I) and quadrature (Q) components are sampled at an optimum sample rate and at an optimum instance of time without requiring a numerically controlled oscillator or voltage controlled oscillator.
    • 用于提供符号定时恢复的接收机,系统和方法,其允许用于通信系统的便宜且低复杂度的同步。 接收机接收包含从发射机发送的分组形式的数字数据的信号。 接收机使用包含在每个分组中的信息来将接收机时钟的相位与发射机时钟的相位对准。 接收器进一步控制采样装置,使得同相(I)和正交(Q)分量以最佳采样率和最佳时间实例采样,而不需要数字振荡器或压控振荡器。
    • 9. 发明授权
    • Low complexity error concealment for wireless transmission
    • 无线传输的低复杂度错误隐藏
    • US07155654B2
    • 2006-12-26
    • US10435176
    • 2003-05-10
    • Charles ChienDavid Hsueh-Chia Chien
    • Charles ChienDavid Hsueh-Chia Chien
    • H04L1/00G06F11/00
    • H04L1/0071G11B20/10009H03M13/00H04L1/0019H04L1/0045H04L1/0072
    • An apparatus and method for concealing errors in digital data. An interpolator estimates a value of a sample of digital data from other samples of the digital data. The interpolator has an input for inputting the digital data and an output for outputting the estimated value of the sample of the digital data. A holding unit has an input for selectively receiving the sample of the digital data only when the sample is error free, and an output for outputting the error free sample. The input of the holding unit may be in parallel with the input of the interpolator. A selector selects between outputting the estimated value of the sample of the received digital data from an output of the interpolator and outputting the error free sample of the received digital data from an output of a holding unit based on at least one error indicator.
    • 一种用于隐藏数字数据中的错误的装置和方法。 内插器估计来自数字数据的其他样本的数字数据样本的值。 内插器具有用于输入数字数据的输入和用于输出数字数据的样本的估计值的输出。 保持单元具有用于仅当样本无错误时有选择地接收数字数据的样本的输入和用于输出无错误样本的输出。 保持单元的输入可以与内插器的输入并联。 选择器选择从内插器的输出输出接收的数字数据的样本的估计值,并基于至少一个误差指示符从保持单元的输出输出接收到的数字数据的无错误采样。