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    • 1. 发明授权
    • Wireless communication system and semiconductor integrated circuit
    • 无线通信系统和半导体集成电路
    • US07340227B2
    • 2008-03-04
    • US11154665
    • 2005-06-17
    • Daisuke YoshimiAkio YamamotoYutaka Igarashi
    • Daisuke YoshimiAkio YamamotoYutaka Igarashi
    • H01Q11/12H04B7/00G06F7/556
    • H04W52/52
    • A wireless communication system uses a transmission power detection circuit. The transmission power detection circuit has excellent linearity of detection output for transmission output power and can obtain detection output not having temperature dependence. The transmission power detection circuit has a rectifying detection part that includes plural amplifiers connected in series and obtains detection output by taking out rectified outputs from emitters of input transistors of amplifiers of individual stages and synthesizing them. A compensation voltage generating circuit has a dummy amplifier having a construction similar to the amplifiers constituting the rectifying detection part and a coefficient circuit that changes output of the dummy amplifier at a specified ratio, and generates voltage for compensating temperature characteristics. Also included is an addition/subtraction circuit that obtains detection output free of temperature dependence by subtracting compensation voltage generated in the compensation voltage generating circuit from output voltage of the rectifying detection part.
    • 无线通信系统使用发送功率检测电路。 传输功率检测电路具有良好的发送输出功率的检测输出线性度,可以获得不具有温度依赖性的检测输出。 发送功率检测电路具有整流检测部,该整流检测部包括串联连接的多个放大器,通过从各级放大器的输入晶体管的发射极取出整流输出并合成来获得检测输出。 补偿电压产生电路具有类似于构成整流检测部分的放大器的结构的虚拟放大器和以特定比率改变虚拟放大器的输出并产生用于补偿温度特性的电压的系数电路。 还包括加法/减法电路,通过从整流检测部分的输出电压减去补偿电压产生电路中产生的补偿电压来获得没有温度依赖性的检测输出。
    • 2. 发明申请
    • Wireless communication system and semiconductor integrated circuit
    • 无线通信系统和半导体集成电路
    • US20050287966A1
    • 2005-12-29
    • US11154665
    • 2005-06-17
    • Daisuke YoshimiAkio YamamotoYutaka Igarashi
    • Daisuke YoshimiAkio YamamotoYutaka Igarashi
    • H01Q11/12H03F3/21H04B7/00H04B7/005
    • H04W52/52
    • A wireless communication system uses a transmission power detection circuit. The transmission power detection circuit has excellent linearity of detection output for transmission output power and can obtain detection output not having temperature dependence. The transmission power detection circuit has rectifying detection part that includes plural amplifiers connected in series and obtains detection output by taking out rectified outputs from emitters of input transistors of amplifiers of individual stages and synthesizes them. A compensation voltage generating circuit has a dummy amplifier having a construction similar to the amplifiers constituting the rectifying detection part and a coefficient circuit that changes output of the dummy amplifier at a specified ratio, and generates voltage for compensating temperature characteristics. Also included is an addition/subtraction circuit that obtains detection output free of temperature dependence by subtracting compensation voltage generated in the compensation voltage generating circuit from output voltage of the rectifying detection part.
    • 无线通信系统使用发送功率检测电路。 传输功率检测电路具有良好的发送输出功率的检测输出线性度,可以获得不具有温度依赖性的检测输出。 发送功率检测电路具有整流检测部,该整流检测部包括串联连接的多个放大器,通过从各个级的放大器的输入晶体管的发射极取出整流的输出而得到检测输出,并进行合成。 补偿电压产生电路具有类似于构成整流检测部分的放大器的结构的虚拟放大器和以特定比率改变虚拟放大器的输出并产生用于补偿温度特性的电压的系数电路。 还包括加法/减法电路,通过从整流检测部分的输出电压减去补偿电压产生电路中产生的补偿电压来获得没有温度依赖性的检测输出。