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1. 发明授权

US06437634B1 Semiconductor circuit in which distortion caused by change in ambient temperature is compensated 失效
标题翻译：其中补偿由环境温度变化引起的失真的半导体电路
公开(公告)号：US06437634B1
公开(公告)日：2002-08-20
申请号：US09195410
申请日：1998-11-19
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03K342
CPC分类号： H03F1/3205 , H03F1/301 , H03F2200/18 , H03F2200/447
摘要： A semiconductor circuit includes an amplifying circuit and compensates the distortion characteristic in the event of changes in the ambient temperature. If the amplifying circuit is a field effect transistor (FET) amplifying circuit having a grounded source, a compensating circuit in which a thermistor having a negative temperature characteristic and a thermistor having a positive temperature characteristic are connected in a series is provided between the grounding point and the source of the FET to compensate distortion of signals outputted from the FET that is caused by the ambient temperature. The temperature at which distortion is considered a minimum is taken as the reference temperature, and the drain current that flows at this reference temperature is made a minimum such that the drain current increases as the ambient temperature deviates from the reference temperature, thereby suppressing or preventing increase in distortion in the event of changes in the ambient temperature.
摘要翻译：半导体电路包括放大电路，并在环境温度变化的情况下补偿失真特性。如果放大电路是具有接地源的场效应晶体管（FET）放大电路，则具有负温度特性的热敏电阻和具有正温度特性的热敏电阻串联连接的补偿电路设置在接地点以及FET的源极，以补偿由环境温度引起的从FET输出的信号的失真。将失真视为最小值的温度作为参考温度，将在该参考温度下流动的漏极电流设为最小，使得漏极电流随着环境温度偏离参考温度而增加，从而抑制或防止在环境温度变化的情况下增加失真。

2. 发明授权

US06278313B1 Semiconductor circuit in which distortion caused by changes in ambient temperature is compensated 有权
标题翻译：补偿了由环境温度变化引起的变形的半导体电路
公开(公告)号：US06278313B1
公开(公告)日：2001-08-21
申请号：US09592280
申请日：2000-06-12
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03K508
CPC分类号： H03F1/3205 , H03F1/301 , H03F2200/18 , H03F2200/447
摘要： A semiconductor circuit includes an amplifying circuit and compensates the distortion characteristic in the event of changes in the ambient temperature. If the amplifying circuit is a field effect transistor (FET) amplifying circuit having a grounded source, a compensating circuit in which a thermistor having a negative temperature characteristic and a thermistor having a positive temperature characteristic are connected in a series is provided between the grounding point and the source of the FET to compensate distortion of signals outputted from the FET that is caused by the ambient temperature. The temperature at which distortion is considered a minimum is taken as the reference temperature, and the drain current that flows at this reference temperature is made a minimum such that the drain current increases as the ambient temperature deviates from the reference temperature, thereby suppressing or preventing increase in distortion in the event of changes in the ambient temperature.
摘要翻译：半导体电路包括放大电路，并且在环境温度变化的情况下补偿失真特性。如果放大电路是具有接地源的场效应晶体管（FET）放大电路，则具有负温度特性的热敏电阻和具有正温度特性的热敏电阻串联连接的补偿电路设置在接地点以及FET的源极，以补偿由环境温度引起的从FET输出的信号的失真。将失真视为最小值的温度作为参考温度，将在该参考温度下流动的漏极电流设为最小，使得漏极电流随着环境温度偏离参考温度而增加，从而抑制或防止在环境温度变化的情况下增加失真。

3. 发明授权

US6147557A Semiconductor circuit compensating for changes in gain slope of the circuit's gain-frequency characteristic caused by ambient temperature changes 有权
标题翻译：半导体电路补偿由环境温度变化引起的电路增益 - 频率特性的增益斜率变化
公开(公告)号：US6147557A
公开(公告)日：2000-11-14
申请号：US195621
申请日：1998-11-19
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F1/22 , H03F1/30 , H03F1/56 , H03F3/16 , H03F3/191
CPC分类号： H03F1/301 , H03F1/223 , H03F1/56 , H03F2200/225 , H03F2200/243 , H03F2200/447 , H03F2200/63
摘要： Compensating for fluctuations in the gain characteristic of the gain slope in the event of changes in ambient temperature without increasing circuit scale or adding to costs. A thermistor, which is a thermally sensitive resistance element in which resistance changes with a negative temperature characteristic according to the ambient temperature, is employed as the gate resistance of an FET, and the circuit functions such that fluctuations in the gain characteristic of the gain slope with respect to ambient temperature are canceled out by fluctuations in the value of Q with respect to the ambient temperature, thereby compensating for fluctuations in the gain slope characteristic in the event of changes in the ambient temperature.
摘要翻译：在环境温度变化的情况下补偿增益斜率的增益特性的波动，而不会增加电路规模或增加成本。采用作为耐温度特性根据环境温度而电阻变化的热敏电阻元件的热敏电阻作为FET的栅极电阻，电路的功能是增益斜率的增益特性的波动通过相对于环境温度的Q值的波动来抵消环境温度，从而补偿在环境温度变化的情况下增益斜率特性的波动。

4. 发明授权

US06313706B1 Semiconductor circuit with a stabilized gain slope 有权
标题翻译：具有稳定增益斜率的半导体电路
公开(公告)号：US06313706B1
公开(公告)日：2001-11-06
申请号：US09195620
申请日：1998-11-19
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F3191
CPC分类号： H03F1/086 , H03F3/191
摘要： Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.
摘要翻译：实现稳定的增益斜率，而不增加电路规模或需要额外的时间或小心纠正阻抗。由电容器和电感器构成的谐振电路设置在反馈回路外部的输出级，用于实现特定频率的峰值，并实现具有例如1dB或更大的期望斜率的增益斜率。

5. 发明授权

US6028487A Negative-feedback amplifier circuit capable of independently controlling a gain and an impedance 失效
标题翻译：负反馈放大器电路能够独立地控制增益和阻抗
公开(公告)号：US6028487A
公开(公告)日：2000-02-22
申请号：US939879
申请日：1997-09-29
申请人： Yuji Kakuta , Yasuhiro Shirakawa , Yoshiaki Fukasawa , Yoshiaki Wakabayashi
发明人： Yuji Kakuta , Yasuhiro Shirakawa , Yoshiaki Fukasawa , Yoshiaki Wakabayashi
IPC分类号： H03F1/22 , H03F1/34
CPC分类号： H03F1/223
摘要： A plurality of field effect transistors (FET's) (11, 12) are coupled in cascode connection. A drain of the final-stage FET (12) is coupled to a gate of the first-stage FET (11) through a first negative-feedback circuit (13). A drain of the first-stage FET (11) is coupled to the gate of the first-stage FET (11) through a second negative-feedback circuit (14). The first negative-feedback circuit (13) is connected to a first resistor (Rf1) while the second negative-feedback circuit (14) is connected to a second resistor (Rf2).
摘要翻译：多个场效应晶体管（FET）（11,12）以级联连接耦合。最终级FET（12）的漏极通过第一负反馈电路（13）耦合到第一级FET（11）的栅极。第一级FET（11）的漏极通过第二负反馈电路（14）耦合到第一级FET（11）的栅极。第一负反馈电路（13）连接到第一电阻器（Rf1），而第二负反馈电路（14）连接到第二电阻器（Rf2）。

6. 发明授权

US6111465A Amplifying unit comprising an input transformer capable of contributing to a wider frequency band of a broadband amplifier 失效
标题翻译：放大单元包括能够有助于宽带放大器的较宽频带的输入变压器
公开(公告)号：US6111465A
公开(公告)日：2000-08-29
申请号：US948334
申请日：1997-10-09
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yasuhiro Shirakawa , Yoshiaki Wakabayashi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yasuhiro Shirakawa , Yoshiaki Wakabayashi
IPC分类号： H01F19/06 , H01F19/04 , H03F1/42 , H03F3/68 , H03H7/42 , H03F3/26
CPC分类号： H03F3/3098 , H01F19/04 , H03F1/223 , H03F1/565 , H03H7/42 , H01F2017/067 , H01F2027/2833 , H03F2200/534
摘要： An input transformer, used as a transmission-line transformer (11), is provided for connection between an unbalanced transmission line (10) and a balanced broadband amplifier (12), in which the input transformer has a fixed middle potential. The transmission-line transformer (11) converts an input signal into two output signals having opposite phase with respect to each other and which are supplied to the broadband amplifier (12). It is therefore possible to cancel secondary distortion in an amplifying unit. As the transmission-line transformer (11) a forced-balun type transmission-line transformer is used which has two input ports (P1, P2) and three output ports (P3, P4, P5), one (P4) of which is grounded. First and second two-wire parallel lines are arranged between the input ports and the output ports via a single glasses-shaped core. The input port and the two output ports have a respective impedance ratio of 1:(1/2):(1/2).
摘要翻译：用作传输线变压器（11）的输入变压器用于连接不平衡传输线（10）和平衡宽带放大器（12），其中输入变压器具有固定的中间电位。传输线变压器（11）将输入信号转换为相对于彼此具有相反相位并被提供给宽带放大器（12）的两个输出信号。因此，可以消除放大单元中的二次失真。作为传输线变压器（11），使用具有两个输入端口（P1，P2）和三个输出端口（P3，P4，P5）的强制平衡 - 不平衡变压器式传输线变压器，其中一个（P4）接地。第一和第二双线并行线通过单个玻璃形芯布置在输入端口和输出端口之间。输入端口和两个输出端口具有1：（+ E，fra 1/2 + EE）的相应阻抗比：（+ E，fra 1/2 + EE）。

7. 发明授权

US06011438A Push-pull wideband semiconductor amplifier 有权
标题翻译：推挽式宽带半导体放大器
公开(公告)号：US06011438A
公开(公告)日：2000-01-04
申请号：US195408
申请日：1998-11-19
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F1/22 , H03F3/26
CPC分类号： H03F1/22 , H03F1/42 , H03F3/26 , H03F2200/36 , H03F2200/534 , H03F2200/541 , H03F2200/63
摘要： A push-pull wideband semiconductor amplifier for use in, for example, a CATV (cable television) system. The amplifier suppresses deterioration of composite second-order (CSO) distortion in output signals. The push-pull wideband amplifier includes: a divider which divides a signal inputted by way of an input terminal into two signals of differing phase, first and second amplifying circuits each of which amplifies the signal divided by the divider, and a combiner which combines the two signals amplified by the first and second amplifying circuits into one signal and outputs the result signal. The node between the first amplifying circuit and the second amplifying circuit is an imaginary ground point having a potential of 0 V from the standpoint of an alternating-current signal. A termination circuit is provided between this imaginary ground, point and ground and absorbs fluctuation in potential generated at the imaginary ground point. In the event of fluctuation in potential generated at the imaginary ground point, the fluctuation in potential is absorbed by the termination circuit. The standing wave that accompanies fluctuation in potential is therefore not generated, and even-order distortion is suppressed.
摘要翻译：用于例如CATV（有线电视）系统的推挽式宽带半导体放大器。放大器抑制输出信号中复合二阶（CSO）失真的恶化。推挽式宽带放大器包括：除法器，其将通过输入端子输入的信号分成两个不同相位，第一和第二放大电路的信号，每个放大电路放大由分频器分频的信号;以及组合器，由第一和第二放大电路放大的两个信号变成一个信号并输出结果信号。第一放大电路和第二放大电路之间的节点是从交流信号的观点出发具有0V的电位的虚拟接地点。在这个假想的地面，点和地面之间设置一个终端电路，并吸收在虚拟地面点产生的电位波动。在虚拟接地点产生的电位波动的情况下，电位的波动由终端电路吸收。因此不产生伴随电位波动的驻波，抑制偶数阶失真。

8. 发明授权

US06501335B2 Semiconductor circuit with a stabilized gain slope 失效
公开(公告)号：US06501335B2
公开(公告)日：2002-12-31
申请号：US09933809
申请日：2001-08-22
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F3191
CPC分类号： H03F1/086 , H03F3/191
摘要： Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.

9. 发明授权

US06476679B2 Semiconductor circuit with a stabilized gain slope 失效
公开(公告)号：US06476679B2
公开(公告)日：2002-11-05
申请号：US09933751
申请日：2001-08-22
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F3191
CPC分类号： H03F1/086 , H03F3/191
摘要： Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.

10. 发明授权

US06388527B1 Semiconductor circuit with a stabilized gain slope 失效
公开(公告)号：US06388527B1
公开(公告)日：2002-05-14
申请号：US09933808
申请日：2001-08-22
申请人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
发明人： Yuji Kakuta , Yoshiaki Fukasawa , Yuichi Taguchi
IPC分类号： H03F368
CPC分类号： H03F1/086 , H03F3/191
摘要： Realizing a stabilized gain slope without increasing circuit scale or entailing extra time or care for correcting impedance. A resonant circuit that is made up of a capacitor and an inductor is provided in an output stage outside a feedback loop for realizing peaking at a particular frequency and for realizing a gain slope having a desired slope of, for example, 1 dB or more.

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