公开(公告)号：US5525924A

公开(公告)日：1996-06-11

申请号：US306367

申请日：1994-09-15

申请人： Takashi Ueno ,  Mikio Koyama ,  Hiroshi Tanimoto

发明人： Takashi Ueno ,  Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： G06G7/24 ,  H03G7/08 ,  H03G11/08

CPC分类号： H03G7/08

摘要： A log conversion circuit comprising first and second input terminals to which voltage signals are input, first and second resistors, first ends of which are respectively connected to the first and second input terminals, first and second PN junction element sections connected in series and in opposite polarities, between a second end of the first resistor and a second end of the second resistor, a biasing circuit connected between a first source terminal and a node between the first and second PN junction element sections, first and second current sources for determining potentials at both ends of the first resistor, the first current source means connected between the first end of the first resistor and the first and second source terminals, and the second current source means being connected between the second end of the first resistor and the first and second source terminals, third and fourth current sources for determining potentials at both ends of the second resistor, the third current source means connected between the first end of the second resistor and the first and second source terminals, and the fourth current source means being connected between the second end of the second resistor and the first and second source terminals, and first and second output terminals for outputting voltage signals generated in the first and second PN junction element sections.

摘要翻译： 一种对数转换电路，包括输入电压信号的第一和第二输入端子，第一和第二电阻器，第一和第二电阻器的第一端分别连接到第一和第二输入端子，第一和第二PN结元件部分串联连接， 在所述第一电阻器的第二端和所述第二电阻器的第二端之间的极性，连接在所述第一和第二PN结元件部分之间的第一源极端子和节点之间的偏置电路，用于确定第一和第二PN结元件部分之间的电位的第一和第二电流源 第一电阻器的两端连接在第一电阻器的第一端和第一和第二源极之间，第二电流源装置连接在第一电阻器的第二端和第一和第二电阻之间 源极端子，用于确定第二电阻器两端电位的第三和第四电流源，第三电流源 电流源装置连接在第二电阻器的第一端和第一和第二源极之间，第四电流源装置连接在第二电阻器的第二端和第一和第二源极端子之间，第一和第二输出端子 用于输出在第一和第二PN结元件部分中产生的电压信号。

公开(公告)号：US5227681A

公开(公告)日：1993-07-13

申请号：US715772

申请日：1991-06-14

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： G06G7/184 ,  H03H11/04

CPC分类号： G06G7/184 ,  H03H11/0433 ,  H03H11/045

摘要： An integration circuit includes a differential amplifier constituted by at least two bipolar transistors serving as amplifying elements, a capacitor connected, as a load, to the differential amplifier, and a field-effect transistor having source and drain electrodes connected between the emitter electrodes of the two bipolar transistors. A control voltage is applied to the gate electrode of the field-effect transistor.

公开(公告)号：USRE36861E

公开(公告)日：2000-09-12

申请号：US264034

申请日：1999-03-08

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： H03F3/45

摘要： A differential amplifier with improved linearity. The amplifier includes a circuit comprised of two emitter-coupled pairs, each pair being formed by two transistors, with connections between corresponding collectors, and constant voltage sources for producing offsets between corresponding bases of the emitter-coupled pairs. The improved linearity is achieved by obtaining outputs as sums of collector currents with offsets. The emitter areas of the transmitters can be of the minimum size available. This feature, when combined with the use of emitter-followers as the constant voltage sources, enable the differential amplifier to achieve a high S/N ratio, a good high-frequency characteristic, a high direct current gain, and a high-speed operation capability along with the improved linearity. In addition, the linearity is further improved by using additional diodes connected to the transistors.

摘要翻译： 具有提高线性度的差分放大器。 放大器包括由两个发射极耦合对组成的电路，每对由两个晶体管形成，其中相应的集电极之间具有连接，以及用于产生发射极耦合对的相应基极之间的偏移的恒定电压源。 通过获得输出作为具有偏移的集电极电流的总和来实现改进的线性度。 变送器的发射极面积可以是可用的最小尺寸。 该特征与使用发射极跟随器作为恒定电压源组合使能使差分放大器实现高S / N比，良好的高频特性，高直流增益和高速运算 能力以及改善的线性度。 此外，通过使用连接到晶体管的附加二极管来进一步提高线性度。

公开(公告)号：US4884036A

公开(公告)日：1989-11-28

申请号：US163843

申请日：1988-03-03

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： H03H11/04

CPC分类号： H03H11/04

摘要： A loop circuit of a band-pass filter is constituted by connecting two integrating circuits each including a current source and a capacitor connected to an output terminal of the current source so that an input terminal of one of the integrating circuits is connected to an output terminal of the other and an output terminal of one of the integrating circuits is connected to an input terminal of the other. At least two sets of the loop circuits are used, and these loop circuits are coupled by a capacitor (Ck). Two termination resistors are connected to an output terminal of a start loop circuit and an output terminal of an end loop circuit, respectively. A coupling capacitor is connected to an input terminal of the start loop circuit, and an input signal is input to the start loop circuit through the coupling capacitor. An output signal is output from an output terminal of the end loop circuit.

公开(公告)号：US5384501A

公开(公告)日：1995-01-24

申请号：US56392

申请日：1993-05-04

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： G06G7/184 ,  H03H11/04 ,  H03F3/45

CPC分类号： G06G7/184 ,  H03H11/0433 ,  H03H11/045 ,  H03H11/0472

摘要： An integration circuit includes a differential amplifier constituted by at least two bipolar transistors serving as amplifying elements, a capacitor connected, as a load, across the collection electrodes of the differential amplifier, and a field-effect transistor having source and drain electrodes connected between the emitter electrodes of the two bipolar transistors. A control voltage is applied to the gate electrode of the field-effect transistor. By changing the resistance value between the source and drain electrodes of the field-effect transistor using a gate voltage, the transconductance of the differential amplifier is changed over a wide range. As a result, the time constant of the integration circuit is changed, such that if the integration circuit is used for an active filter, for example, the cut-off frequency can be changed by changing the time constant of the integration circuit.

摘要翻译： 积分电路包括由用作放大元件的至少两个双极晶体管构成的差分放大器，作为负载连接在差分放大器的集电极上的电容器，以及具有连接在差分放大器的集电极之间的源极和漏极的场效应晶体管 两个双极晶体管的发射极。 控制电压施加到场效应晶体管的栅电极。 通过使用栅极电压来改变场效应晶体管的源电极和漏电极之间的电阻值，差分放大器的跨导在宽范围内变化。 结果，积分电路的时间常数被改变，使得如果积分电路用于有源滤波器，例如，可以通过改变积分电路的时间常数来改变截止频率。

公开(公告)号：US5081423A

公开(公告)日：1992-01-14

申请号：US385305

申请日：1989-07-26

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： G06G7/186 ,  H03F1/32 ,  H03F3/45 ,  H03H11/12

CPC分类号： H03F3/4521 ,  G06G7/186 ,  H03F1/3211 ,  H03F3/45071 ,  H03H11/1213 ,  H03F2203/45366

摘要： In an integrator circuit having a wide linearity range, there are provided: a first emitter-coupled transistor pair having two bipolar transistors, emitter areas of the transistors being substantially equal to each other; a second emitter-coupled transistor pair having two bipolar transistors, emitter areas of said transistors being substantially equal to each other; first and second input terminals for receiving an input voltage respectively; a first output terminal to which a first collector of the first emitter-coupled pair and also a first collector of the second emitter-coupled transistor pair of commonly connected; a second output terminal to which a second collector of the first emitter-coupled transistor pair and also a second collector of the second emitter-coupled transistor pair are commonly connected; first DC-voltage applying means connected to the first input terminal, for applying a first offset DC (direct current) voltage having a predetermined level between a first base electrode of the first emitter-coupled transistor pair and a first base electrode of the second emitter-coupled transistor pair; second DC-voltage applying means connected to the second input terminal, for applying a second offset DC voltage having the same level but an opposite polarity to that of the first offset DC voltage between a second base electrode of the first emitter-coupled transistor pair and a second base electrode of the second emitter-coupled transistor pair; and, capacitance means connected between the first and second output terminals.

公开(公告)号：US5006818A

公开(公告)日：1991-04-09

申请号：US500044

申请日：1990-03-27

申请人： Mikio Koyama ,  Hiroshi Tanimoto

发明人： Mikio Koyama ,  Hiroshi Tanimoto

IPC分类号： H03F3/45 ,  H03F1/32

CPC分类号： H03F1/3211

摘要： A differential amplifier with improved linearity. The amplifier includes a circuit comprised of two emitter-coupled pairs, each pair being formed by two transistors, with connections between corresponding collectors, and constant voltage sources for producing offsets between corresponding bases of the emitter-coupled pairs. The improved linearity is achieved by obtaining outputs as sums of collector currents with offsets. The emitter areas of the transistors can be of the minimum size available. This feature, when combined with the use of emitter-followers as the constant voltage sources, enable the differential amplifier to achieve a high S/N ratio, a good high-frequency characteristic, a high direct current gain, and a high-speed operation capability along with the improved linearity. In addition, the linearity is further improved by using additional diodes connected to the transistors.

公开(公告)号：US20070020549A1

公开(公告)日：2007-01-25

申请号：US11439750

申请日：2006-05-24

申请人： Mikio Koyama ,  Kenji Hayashi

发明人： Mikio Koyama ,  Kenji Hayashi

IPC分类号： G03G9/087

CPC分类号： G03G9/0806 ,  G03G9/0819 ,  G03G9/0821 ,  G03G9/0827 ,  G03G9/08711 ,  G03G9/08728 ,  G03G9/08755 ,  G03G9/08782 ,  G03G9/08793 ,  G03G9/08795 ,  G03G9/08797 ,  G03G9/09708

摘要： A method of manufacturing a toner comprising the steps of: (i) forming oil droplets in an aqueous medium comprising a surfactant having a long chain hydrocarbon group and an acid group, the oil droplets comprising: (i-a) a polycarboxylic acid having two or more carboxyl groups, (1-b) a polyalcohol having two or more hydroxyl groups, (i-c) a styrene compound, (i-d) a (meth)acrylate ester; (ii) polycondensing the polycarboxylic acid and the polyalcohol by heating to form a polyester resin in the oil droplets; (iii) radically polymerizing the styrene compound and the (meth)acrylate ester by supplying radicals to form a styrene-acryl copolymer resin in the droplets, as a result of steps (ii) and (iii), composite resin particles containing the polyester resin and the styrene-acryl copolymer resin are formed; and (iv) coagulating the composite resin particles in an aqueous medium.

摘要翻译： 一种制造调色剂的方法，包括以下步骤：（i）在包含具有长链烃基和酸基的表面活性剂的水性介质中形成油滴，所述油滴包含：（ia）具有两个或更多个的多元羧酸 羧基，（1-b）具有两个或更多个羟基的多元醇，（ic）苯乙烯化合物，（id）（甲基）丙烯酸酯; （ii）通过加热使多元羧酸和多元醇缩聚以在油滴中形成聚酯树脂; （iii）作为步骤（ii）和（iii）的结果，通过供应自由基以在液滴中形成苯乙烯 - 丙烯酸共聚物树脂来自由基聚合苯乙烯化合物和（甲基）丙烯酸酯，含有聚酯树脂的复合树脂颗粒 并形成苯乙烯 - 丙烯酸共聚物树脂; 和（iv）在水性介质中使复合树脂颗粒凝结。

公开(公告)号：US5706311A

公开(公告)日：1998-01-06

申请号：US631282

申请日：1996-04-12

申请人： Mikio Koyama

发明人： Mikio Koyama

IPC分类号： H04L27/36 ,  H04L23/02

CPC分类号： H04L27/362 ,  H03C3/403

摘要： The goal of this invention is to offer an orthogonal modulator circuit where carrier feedthrough of the direct modulation method does not occur and there are not the two output frequencies of the indirect modulation method. A signal with the first frequency (.omega..sub.c1) enters a first and a second modulator 30, 40 and becomes two reciprocal 90.degree. phase shifted, four phase modulated signals S.sub.1, S.sub.2 that enter a first and a second mixer circuit 51, 52; a signal with the second frequency (.omega..sub.c2) is multiplied with the two 90.degree. phase shifted signals, and the output of the first and second mixer are added together in a SSB modulator resulting in the output of a single frequency signal.

摘要翻译： 本发明的目的是提供一种正交调制器电路，其中直接调制方式的载波馈通不发生，并且不存在间接调制方法的两个输出频率。 具有第一频率（ωc1）的信号进入第一和第二调制器30,40，并变成进入第一和第二混频器电路51,52的两个倒数90°相移，四个相位调制信号S1，S2; 具有第二频率（ωc2）的信号与两个90°相移信号相乘，并且第一和第二混频器的输出在SSB调制器中相加在一起，导致单个频率信号的输出。

公开(公告)号：US5601923A

公开(公告)日：1997-02-11

申请号：US345006

申请日：1994-11-23

申请人： Mikio Koyama ,  Yoshiaki Koizumi ,  Kenji Hayashi ,  Jiro Takahashi

发明人： Mikio Koyama ,  Yoshiaki Koizumi ,  Kenji Hayashi ,  Jiro Takahashi

IPC分类号： C08F6/18 ,  C08F6/00 ,  G03G9/08 ,  G03G9/087 ,  G03G15/06

CPC分类号： G03G9/0804 ,  G03G9/0819 ,  Y10T428/12194 ,  Y10T428/29 ,  Y10T428/2973 ,  Y10T428/298 ,  Y10T428/2982

摘要： A mono-dispersed fine polymer particle having an irregular shape manufactured by processing a polymer particle dispersing solution in which at least one kind of hydrophilic-hydrophobic amphoteric organic solvent is added to the polymer particle dispersing solution so that particles can be associated with each other. The mutual solubility in water of the hydrophilic-hydrophobic amphoteric organic solvent is in the range from 0.1 to 50%.

摘要翻译： 通过加工聚合物颗粒分散溶液制造的具有不规则形状的单分散精细聚合物颗粒，其中将至少一种亲水疏水性两性有机溶剂加入到聚合物颗粒分散溶液中，使得颗粒可以彼此结合。 亲水疏水性两性有机溶剂在水中的互溶性为0.1〜50％。