会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 4. 发明授权
    • Control method for producing a ramp of output power and transmitter utilizing the same
    • 用于产生输出功率的斜坡的控制方法和利用其的发射机
    • US07689183B2
    • 2010-03-30
    • US11613211
    • 2006-12-20
    • Liang Yan
    • Liang Yan
    • H04B1/04
    • H04B1/0475H04B2001/0416
    • A transmitter controlling output power to generate a ramp and a method thereof. The transmitter comprises a baseband module, a transmitter module, and a power amplifier. The baseband module receives a power control level, determines a scaling factor according to the power control level, determines a difference between an upper power limit and lower power limit according to a position on the ramp, and calculates a control signal according to the scaling factor, the lower power limit, and the difference. The transmitter module transmits data. The power amplifier coupled to the baseband module and the transmitter module, outputs the data with the output power according the control signal.
    • 控制输出功率以产生斜坡的发射机及其方法。 发射机包括基带模块,发射机模块和功率放大器。 基带模块接收功率控制电平,根据功率控制电平确定缩放因子,根据斜坡上的位置确定上限功率限制和下限功率限制之间的差值,并根据比例因子计算控制信号 ,功率下限和差异较小。 发射机模块发送数据。 耦合到基带模块和发射机模块的功率放大器,根据控制信号输出具有输出功率的数据。
    • 5. 发明申请
    • TRANSMITTER IDENTIFICATION INFORMATION SIGNAL DETECTION APPARATUS AND METHOD
    • 发射机识别信息信号检测装置和方法
    • US20090207949A1
    • 2009-08-20
    • US12099540
    • 2008-04-08
    • Liang YanGuangling Zhao
    • Liang YanGuangling Zhao
    • H04L27/06
    • H04H60/50H04H2201/20H04L27/2647
    • A transmitter identification information (TII) signal detection circuit is suitable for an orthogonal frequency division modulation system. A TII signal detection circuit receives a TII signal and conducts a cross-correlation calculation on the TII signal and a phase reference symbol (PRS) so as to obtain a present cross-correlation result, and then, sums the cross-correlation results obtained by conducting cross-correlations on AVE_TF_NUM-1 pieces of TII signals and the PRS and the present cross-correlation result so as to obtain an accumulated cross-correlation result. After that, a plurality of indices corresponding to a plurality of maximal values in the accumulated cross-correlation result is found out according to the accumulated cross-correlation result. Finally, a present main identifier (MainId) and a present sub-identifier (SubId) are calculated according to the four indices corresponding to the four maximal values, wherein the cross-correlation calculation is conducted on the TII signal and the PRS of every two adjacent sub-carriers.
    • 发射机识别信息(TII)信号检测电路适用于正交频分调制系统。 TII信号检测电路接收TII信号并对TII信号和相位参考符号(PRS)进行互相关计算,以获得当前的互相关结果,然后将由 对AVE_TF_NUM-1条TII信号和PRS进行交叉相关和当前互相关结果,以获得累积的互相关结果。 之后,根据累积的互相关结果求出与累积互相关结果中的多个最大值对应的多个索引。 最后,根据对应于四个最大值的四个索引来计算当前主标识符(MainId)和当前子标识符(SubId),其中对TII信号和每两个的PRS执行互相关计算 相邻副载波。
    • 7. 发明授权
    • Detecting light load conditions and improving light load efficiency in a switching power converter
    • 检测轻载条件并提高开关电源转换器的轻负载效率
    • US08199537B2
    • 2012-06-12
    • US12388709
    • 2009-02-19
    • Liang YanXiaoyan WangJun ZhengJunjie ZhengClarita Poon
    • Liang YanXiaoyan WangJun ZhengJunjie ZhengClarita Poon
    • H02M3/335
    • H02M3/33523H02M2001/0032Y02B70/16
    • A switching power converter detects low load conditions based on the ratio of a first peak current value for peak current switching in constant voltage regulation mode to a second peak current value for peak current switching in constant current regulation mode. The power supply load is considered to have a low load if the ratio is lower than a predetermined threshold. Once a low load condition is detected, the switching frequency of the switching power converter is reduced to a level that minimizes switching loss in the power converter. In addition, the switching power converter also adjusts the switching frequency according to the sensed input line voltage. An offset is added to the switching period to reduce the switching frequency of the switching power converter, as the input line voltage is increased.
    • 开关电源转换器基于用于恒定电流调节模式下的峰值电流切换的恒定电压调节模式中的峰值电流切换的第一峰值电流值与用于恒定电流调节模式下的峰值电流切换的第二峰值电流值的比率来检测低负 如果该比率低于预定阈值,则电源负载被认为具有低负载。 一旦检测到低负载状态,则将开关功率转换器的开关频率降低到最小化功率转换器中的开关损耗的水平。 此外,开关功率转换器还根据感测的输入线电压来调节开关频率。 随着输入线电压的增加,偏置被加到开关周期以降低开关功率转换器的开关频率。
    • 9. 发明授权
    • System and method for controlling a current limit with primary side sensing using a hybrid PWM and PFM control
    • 使用混合PWM和PFM控制来控制初级侧感测的电流限制的系统和方法
    • US07974107B2
    • 2011-07-05
    • US12199471
    • 2008-08-27
    • Yong LiJunjie ZhengLiang YanJohn KestersonXiao Yan Wang
    • Yong LiJunjie ZhengLiang YanJohn KestersonXiao Yan Wang
    • H02M3/335
    • H02M3/33523
    • A hybrid constant current control system that uses both pulse width modulation (PWM) and pulse frequency modulation (PFM) control. When transitioning from constant voltage mode to constant current mode the present invention can continue to control using PWM. Thereafter, when the voltage has dropped, the present invention smoothly transitions to PFM mode. The point of transition is based upon the switching frequency and the lowest rated voltage of operation. The system and method avoids very short (narrow) Ton times which ensures accurate constant current (CC) control with bipolar junction transistor (BJT) devices. The present invention also avoids acoustic noise because the switching frequency is maintained at a high enough level to avoid such acoustic noise even when the energy transferred through the transformer is still substantial and the output voltage is not too low. In addition the output current limit is insensitive to variation in the inductance-input voltage ratio, and is minimized against leakage inductance.
    • 一种采用脉宽调制(PWM)和脉冲频率调制(PFM)控制的混合恒流控制系统。 当从恒定电压模式转换到恒定电流模式时,本发明可以使用PWM继续控制。 此后,当电压下降时,本发明平滑地转变为PFM模式。 转换点基于开关频率和最低额定工作电压。 该系统和方法避免了非常短(窄)的Ton次,从而确保使用双极结型晶体管(BJT)器件进行精确的恒定电流(CC)控制。 本发明还避免了声学噪声,因为即使当通过变压器传送的能量仍然很大并且输出电压不是太低时,开关频率被保持在足够高的水平以避免这种声学噪声。 此外,输出电流限制对电感 - 输入电压比的变化不敏感,并且对漏电感最小化。