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1. 发明授权

US06731918B1 Signal strength detecting device with little temperature dependence 失效
标题翻译：信号强度检测装置温度依赖性很小
公开(公告)号：US06731918B1
公开(公告)日：2004-05-04
申请号：US09431928
申请日：1999-11-02
申请人： Kazuo Kaneki
发明人： Kazuo Kaneki
IPC分类号： H04B1700
CPC分类号： H04B17/318
摘要： A signal strength detecting device includes a logarithmic amplifier and an amplitude detector. A constant current source whose current is proportional to the absolute temperature is used as a current source for biasing the logarithmic amplifier. In contrast, a constant current source whose current is not proportional to the absolute temperature is used as a current source for biasing the amplitude detector. This makes it possible to solve a problem of a conventional signal strength detecting device of being unable to detect the signal strength of a received signal correctly because it employs a constant current source whose current is proportional to the absolute temperature as the current source for biasing the amplitude detector, and hence the collector current output from differential amplifiers constituting the amplitude detector can vary in response to the absolute temperature even if the signal strength of the received signal is kept constant.
摘要翻译：信号强度检测装置包括对数放大器和振幅检测器。将电流与绝对温度成比例的恒流源用作偏置对数放大器的电流源。相比之下，将电流与绝对温度成正比的恒定电流源用作偏置幅度检测器的电流源。这使得可以解决传统的信号强度检测装置由于使用电流与绝对温度成比例的恒定电流源而不能正确检测接收信号的信号强度的问题，作为用于偏置接收信号的电流源振幅检测器，因此即使接收信号的信号强度保持不变，构成振幅检测器的差分放大器的集电极电流输出也可响应于绝对温度而变化。

2. 发明授权

US06388502B2 Semiconductor integrated circuit 失效
标题翻译：半导体集成电路
公开(公告)号：US06388502B2
公开(公告)日：2002-05-14
申请号：US09756215
申请日：2001-01-09
申请人： Kazuo Kaneki , Takahiro Miki
发明人： Kazuo Kaneki , Takahiro Miki
IPC分类号： G06F744
CPC分类号： H03F3/45089 , H03D7/1433 , H03D7/1458 , H03D2200/0088 , H03F2200/294 , H03F2200/372 , H03F2203/45631 , H03F2203/45702 , H03F2203/45722
摘要： An output signal gain is improved by a semiconductor integrated circuit comprising a mixer circuit having an upper-stage transistor circuit to which a local signal is inputted and a lower-stage transistor circuit to which an RF signal is inputted, wherein a first resistance and a second resistance serving as a load are connected between the upper-stage transistor circuit and supply voltage, and a result of multiplication operation performed via the upper-stage transistor circuit and the lower-stage transistor circuit is made to appear as a first signal and a second signal at the first resistance and the second resistance respectively on the basis of the supply voltage; an emitter follower circuit including a first transistor and a second transistor for respectively receiving outputs from the first resistance and the second resistance and outputting a first amplified signal and a second amplified signal that have been subjected to impedance conversion on the basis of the supply voltage; and an operational amplifier circuit for receiving the first amplified signal on an inverting input side via an input resistance and the second amplified signal on a non-inverting input side, the operational amplifier circuit including a feedback resistance for connecting its output side and the inverting input side provided with the input resistance.
摘要翻译：输出信号增益由包括具有输入本地信号的上级晶体管电路的混频器电路和输入RF信号的下级晶体管电路的半导体集成电路改进，其中第一电阻和作为负载的第二电阻连接在上级晶体管电路和电源电压之间，并且经由上级晶体管电路和下级晶体管电路执行的乘法运算的结果作为第一信号和第二电阻和第二电阻分别基于电源电压; 射极跟随器电路，包括第一晶体管和第二晶体管，用于分别从第一电阻和第二电阻接收输出，并输出基于电源电压进行阻抗转换的第一放大信号和第二放大信号; 以及运算放大器电路，用于经由输入电阻在反相输入侧接收第一放大信号，并且在非反相输入侧接收第二放大信号，运算放大器电路包括用于连接其输出侧和反相输入端的反馈电阻一侧设有输入电阻。

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