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1. 发明申请

US20090221259A1 ACTIVE MIXER CIRCUIT AND A RECEIVER CIRCUIT OR A MILLIMETER-WAVE COMMUNICATION UNIT USING IT 有权
标题翻译：主动混频器电路和接收器电路或使用其的微波通信单元
公开(公告)号：US20090221259A1
公开(公告)日：2009-09-03
申请号：US12370159
申请日：2009-02-12
申请人： Nobuhiro SHIRAMIZU , Toru Masuda , Takahiro Nakamura , Katsuyoshi Washio , Masamichi Tanabe
发明人： Nobuhiro SHIRAMIZU , Toru Masuda , Takahiro Nakamura , Katsuyoshi Washio , Masamichi Tanabe
IPC分类号： H04B1/16
CPC分类号： H04B1/28 , H03D7/1433 , H03D7/1441 , H03D7/1458 , H03D2200/0023 , H03D2200/0043
摘要： The present invention provides a semiconductor integrated circuit including an active mixer circuit that is operated at low voltage, low noise, and low power consumption. It includes a transconductance amplifier, a transformer, and a multiplier, connects a transformer between the transconductance amplifier and the multiplier, and separates between the transconductance amplifier and the multiplier with respect to direct current inside the transformer. Further, each of the tranconductance amplifier and the multiplier is configured of transistors that are single-stacked between the supply voltage terminal and ground terminal.
摘要翻译：本发明提供一种半导体集成电路，包括以低电压，低噪声和低功耗工作的有源混频器电路。它包括跨导放大器，变压器和乘法器，连接跨导放大器和乘法器之间的变压器，并且相对于变压器内部的直流电流在跨导放大器和乘法器之间分离。此外，跨导放大器和乘法器中的每一个由在电源电压端子和接地端子之间单层堆叠的晶体管构成。

2. 发明申请

US20090102552A1 SEMICONDUCTOR INTEGRATED CIRCUIT WITH VARIABLE GAIN AMPLIFIER 有权
标题翻译：具有可变增益放大器的半导体集成电路
公开(公告)号：US20090102552A1
公开(公告)日：2009-04-23
申请号：US12252554
申请日：2008-10-16
申请人： Nobuhiro SHIRAMIZU , Toru Masuda
发明人： Nobuhiro SHIRAMIZU , Toru Masuda
IPC分类号： H03F3/68
CPC分类号： H03F3/50 , H03F1/342 , H03F3/195 , H03F2200/135 , H03F2200/18 , H03F2200/294 , H03F2200/451 , H03F2203/5036 , H03G1/0023
摘要： The variable gain amplifier includes a bias circuit (BC) 1, a matching circuit (MC) 2, a variable gain resistive feedback amplifier (FA) 3 and an output follower (EA) 4. The resistance values of the load resistance Rc and feedback resistance Rf are changed in cooperation. In a case of making the load resistance Rc a high resistance to set the low noise amplifier to a high gain, the feedback resistance Rf is also made a high resistance, the feedback time constant τfb(c1)≈2π·RfCbe/(1+gmRc) of the closed loop of the resistive negative feedback amplifier 3 becomes substantially constant, and then the amplifier has a gain small in frequency dependency over a wide bandwidth. In a case of making the load resistance Rc a low resistance to set the low noise amplifier to a low gain, the feedback resistance Rf is also made a low resistance. The feedback resistance Rf with the low resistance increases the negative feedback quantity, and thus the amplifier is set to a low gain. Also, the load resistance Rc is made a low resistance, and the feedback time constant τfb(c1) becomes substantially constant. The gain is not lowered further in a high frequency region.
摘要翻译：可变增益放大器包括偏置电路（BC）1，匹配电路（MC）2，可变增益电阻反馈放大器（FA）3和输出跟随器（EA）4.负载电阻Rc和反馈的电阻值电阻Rf随之改变。在使负载电阻Rc为高电平的情况下，将低噪声放大器设定为高增益的情况下，反馈电阻Rf也变为高电阻，反馈时间常数τfb（c1）≈2pi.RfCbe/（1+ 电阻性负反馈放大器3的闭环的gmRc变得基本恒定，然后放大器在宽带宽上具有小的频率依赖性的增益。在将负载电阻Rc设置为低电阻以将低噪声放大器设置为低增益的情况下，反馈电阻Rf也被制成低电阻。具有低电阻的反馈电阻Rf增加负反馈量，因此放大器被设置为低增益。此外，使负载电阻Rc为低电阻，反馈时间常数τfb（c1）变得基本恒定。增益在高频区域不会进一步降低。

3. 发明申请

US20080122546A1 VARIABLE FREQUENCY OSCILLATOR AND COMMUNICATION CIRCUIT WITH IT 失效
标题翻译：可变频率振荡器及其通信电路
公开(公告)号：US20080122546A1
公开(公告)日：2008-05-29
申请号：US11771403
申请日：2007-06-29
申请人： Nobuhiro SHIRAMIZU , Toru Masuda
发明人： Nobuhiro SHIRAMIZU , Toru Masuda
IPC分类号： H03L7/099 , H03K3/03
CPC分类号： H03L7/0995 , H03K3/0322 , H03K3/35613 , H03K5/133 , H03K2005/00208 , H03K2005/00234 , H03L1/00 , H03L7/0891 , H03L7/18 , H03M9/00
摘要： In a variable frequency oscillator in a semiconductor device, as the variation of an oscillation frequency caused by the variation of temperature and supply voltage and process variation is large, it is difficult to reduce the conversion ratio of control voltage dependent upon phase noise and the oscillation frequency and therefore, phase noise is large. The variation of the oscillation frequency is suppressed and phase noise is reduced by connecting a voltage-to-current conversion circuit that converts input control voltage to control current of a ring oscillator to the ring oscillator where delay circuits a delay time of which increases and decreases according to the amplitude of input control current are cascade-connected by a plurality of stages in a ring and increasing/decreasing current dependent upon any of temperature, supply voltage and the threshold voltage of a transistor inside the voltage-to-current conversion circuit.
摘要翻译：在半导体器件的可变频率振荡器中，随着由温度和电源电压的变化引起的振荡频率的变化和工艺变化的变化大，难以根据相位噪声和振荡来降低控制电压的转换比因此，相位噪声较大。通过连接将输入控制电压转换为环形振荡器的控制电流的电压 - 电流转换电路，振荡频率的变化被抑制，并且相位噪声减小，其中延迟电路的延迟时间增加和减小根据输入控制电流的幅度通过环中的多个级级联连接，并且取决于电压 - 电流转换电路内的晶体管的温度，电源电压和阈值电压中的任一个的增加/减少电流。

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