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    • 6. 发明公开
    • AMPLIFIER CIRCUIT AND WIRELESS COMMUNICATION DEVICE
    • 放大器电路和无线通信设备
    • EP2557682A1
    • 2013-02-13
    • EP10849501.1
    • 2010-12-13
    • Sumitomo Electric Industries, Ltd.
    • ONISHI, Masahiko
    • H03F1/06H03F1/32H03F3/189H03F3/24
    • H03F1/32H03F1/02H03F1/0227H03F1/3247H03F3/189H03F3/24H03F2200/102H03F2200/15H03F2200/207H03F2201/3233
    • In an amplifier circuit 1 of an envelope tracking scheme are provided a timing adjusting unit (1B) having a finite number of adjustment values for adjusting time by which the output is delayed from the input, and capable of adjusting a time difference between an input signal and a power supply voltage which reach an amplifier (100), by making a selection from the adjustment values; a test signal output unit (108) capable of repeatedly sending out a test signal serving as the input signal at predetermined cycles; and an adjustment value determining unit (109) sequentially measuring output power for m (any natural number less than or equal to k) period(s) from the amplifier (100) while changing an adjustment value of the timing adjusting unit (1B) to a different value every k (any natural number) period of the test signal, searching for an adjustment value at which a total sum (or average) of the output power for m period(s) is maximum, and setting the adjustment value on the timing adjusting unit (1B).
    • 在包络跟踪方案的放大器电路1中提供具有有限数量的调整值的时序调整单元(1B),用于调整输出相对于输入延迟的时间,并且能够调整输入信号 以及通过从所述调整值中进行选择而到达放大器(100)的电源电压; 测试信号输出单元(108),其能够以预定周期重复发出用作输入信号的测试信号; 以及调整值确定单元(109),其将来自所述放大器(100)的m(小于或等于k的任意自然数)个周期的输出功率依次测量,同时将所述定时调整单元(1B)的调整值改变为 测试信号的每K(任意自然数)周期的不同值,搜索m个周期的输出功率的总和(或平均值)最大的调整值,并且将调整值设置为 定时调整单元(1B)。