公开(公告)号：US5343163A

公开(公告)日：1994-08-30

申请号：US80269

申请日：1993-06-21

申请人： Lloyd F. Linder ,  Dwight D. Birdsall

发明人： Lloyd F. Linder ,  Dwight D. Birdsall

IPC分类号： H03F1/32 ,  H03F3/30 ,  H03F3/45 ,  H03F3/50

CPC分类号： H03F1/3211 ,  H03F1/3217 ,  H03F1/3276 ,  H03F3/3081 ,  H03F3/45071 ,  H03F3/45098 ,  H03F3/50 ,  H03F3/505 ,  H03F2203/45578 ,  H03F2203/45611 ,  H03F2203/45612 ,  H03F2203/45641 ,  H03F2203/45721

摘要： A compensating transistor (Q5) is connected in series with the collector of a main transistor (Q3), and a level shifted replica (Vin+V1) of an input signal (Vin) is applied to the base of the compensating transistor (Q5) to maintain a constant voltage difference between the base and collector of the main transistor (Q3) and compensate for base width modulation .DELTA.Vce. A voltage-controlled current source (S1) is responsive to the input signal (Vin) and applies a compensating current .DELTA.Iload which is equal and opposite to the load current variation caused by a change (.DELTA.Vin) in the input voltage (Vin) to the emitter of the main transistor (Q3) to compensate for load current modulation .DELTA.Vbe. Alternatively, the compensating current can be applied to the junction of the base of the main transistor (Q3) and the emitter of pre-distortion transistor (Q4) which has a base connected to receive the input signal (Vin). Another compensating transistor (Q12) applies a current (.DELTA.Ib) which is equal and opposite to a non-linear base current variation to the emitter or collector of the main transistor (Q3) to compensate for current gain modulation .DELTA.Ib. The modulation compensation arrangements are applicable to common-collector, common-base and common emitter amplifiers in single-ended and differential configurations, and to substantially all bipolar and field-effect transistor technologies.

摘要翻译： 补偿晶体管（Q5）与主晶体管（Q3）的集电极串联连接，并且输入信号（Vin）的电平偏移副本（Vin + V1）被施加到补偿晶体管（Q5）的基极， 以保持主晶体管（Q3）的基极和集电极之间的恒定电压差并补偿基极宽度调制DELTA Vce。 压控电流源（S1）响应于输入信号（Vin）并且施加与由输入电压（Vin）中的变化（DELTA Vin）引起的负载电流变化相等和相反的补偿电流DELTA Iload， 到主晶体管（Q3）的发射极，以补偿负载电流调制DELTA Vbe。 或者，可以将补偿电流施加到主晶体管（Q3）的基极和预失真晶体管（Q4）的发射极，该基极连接以接收输入信号（Vin）。 另一补偿晶体管（Q12）施加与主晶体管（Q3）的发射极或集电极相当且相反的非线性基极电流变化的电流（DELTA Ib），以补偿电流增益调制DELTA Ib。 调制补偿布置适用于单端和差分配置中的共集电极，公共基极和公共发射极放大器，以及基本上所有的双极和场效应晶体管技术。

公开(公告)号：US5311141A

公开(公告)日：1994-05-10

申请号：US903965

申请日：1992-06-26

申请人： Takehiko Umeyama ,  Yasunori Sakaguchi

发明人： Takehiko Umeyama ,  Yasunori Sakaguchi

IPC分类号： H03F1/30 ,  H03F3/343 ,  H03F3/45 ,  H03H11/04 ,  H03H11/12 ,  H03F1/32 ,  H03K5/00

CPC分类号： H03H11/1213 ,  H03F3/343 ,  H03F3/45089 ,  H03F2203/45294 ,  H03F2203/45311 ,  H03F2203/45392 ,  H03F2203/45508 ,  H03F2203/45721

摘要： An active filter having a frequency characteristics of the fewer variations of manufacturing and the least temperature dependency is provided. A differential amplifier is comprised of resistors 15 and 16 which have a resistance value R.sub.E and are connected in common to a current source 39 in proportion to kT/(qR.sub.0), together with transistors 13 and 14. The transistor 14 is connected to an active load comprised of transistors 18 and 19. The transistor 18 is connected to a current source 31 for producing a current in proportion to a capacity C.sub.0 while the transistor 19 is connected to a current source 30 for producing a current of a remainder of the current produced by the current source 31 subtracted from the current in proportion to 1/R.sub.a. The transistor 19 is further connected to an internal capacitor 21 having capacity C.sub.1. A frequency characteristics of the active filter circuit is determined by the ratio of resistance values R.sub.E, R.sub.0 and R.sub.a and the ratio of the capacities C.sub.O and C.sub.1, and a term of an ambient temperature is cancelled.

摘要翻译： 提供了具有制造变化少和温度依赖性最低的频率特性的有源滤波器。 差分放大器由具有电阻值RE并且与晶体管13和14成比例地与电流源39成比例地连接到电流源39的电阻器15和16组成。晶体管14连接到主动 晶体管18连接到电流源31，用于产生与电容C0成比例的电流，而晶体管19连接到电流源30，以产生产生的电流的剩余部分的电流 由电流源31以1 / Ra的比例从电流中减去。 晶体管19还连接到具有容量C1的内部电容器21。 有源滤波器电路的频率特性由电阻值RE，R0和Ra的比值以及容量CO和C1的比率决定，并且环境温度的项被消除。

公开(公告)号：US5220272A

公开(公告)日：1993-06-15

申请号：US579773

申请日：1990-09-10

申请人： Carl T. Nelson

发明人： Carl T. Nelson

IPC分类号： H02M3/156 ,  H03F3/45

CPC分类号： H03F3/45085 ,  H02M3/156 ,  H03F3/45071 ,  H03F2203/45656 ,  H03F2203/45658 ,  H03F2203/45664 ,  H03F2203/45674 ,  H03F2203/45696 ,  H03F2203/45721

摘要： A switching regulator network is disclosed which receives an input voltage and provides a regulated constant output supply voltage. The regulator includes a pulse width modulated switching circuit which regulates the output voltage responsive to a feedback error signal. A transconductance error amplifier produces an error feedback signal which is proportional to the difference between the reference input voltage and the output voltage. The overshoot of the output supply voltage is minimized by including a means in the transconductance error amplifier to provide a higher negative slew rate current than the positive slew rate current. This is done without employing extra pins or parts in the integrated circuit.

摘要翻译： 公开了一种开关调节器网络，其接收输入电压并提供稳定的恒定输出电源电压。 调节器包括脉冲宽度调制开关电路，其响应于反馈误差信号来调节输出电压。 跨导误差放大器产生与参考输入电压和输出电压之间的差成比例的误差反馈信号。 通过在跨导误差放大器中包括一个装置以提供比正的转换速率电流更高的负压摆率电流来最小化输出电源电压的过冲。 这样做不需要在集成电路中使用额外的引脚或部件。

公开(公告)号：US07800441B2

公开(公告)日：2010-09-21

申请号：US12276253

申请日：2008-11-21

申请人： Vincent Mui ,  Lance Wong ,  Aditya Raina

发明人： Vincent Mui ,  Lance Wong ,  Aditya Raina

IPC分类号： H03F1/36

CPC分类号： H03G1/0035 ,  H03F3/187 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/411 ,  H03F2203/45522 ,  H03F2203/45591 ,  H03F2203/45611 ,  H03F2203/45688 ,  H03F2203/45721 ,  H03G7/002

摘要： A feedback amplifier includes an operational amplifier having an input end and an output end. A first resistor is coupled with the input end of the operational amplifier. A second resistor has a first end coupled with the input end of the operational amplifier and a second end coupled with the output end of the amplifier. A voltage divider has a first end being operably coupled with the output end of the operational amplifier and a second end being analog grounded. In an embodiment, the feedback amplifier further includes a first switch coupled to the first end of the voltage divider and the output end of the operational amplifier, and a second switch coupled to an internal node of the voltage divider. In an embodiment, the feedback amplifier is configured to provide attenuation when the first switch is open and second switch is closed.

摘要翻译： 反馈放大器包括具有输入端和输出端的运算放大器。 第一电阻器与运算放大器的输入端耦合。 第二电阻器具有与运算放大器的输入端耦合的第一端和与放大器的输出端耦合的第二端。 分压器具有可操作地与运算放大器的输出端耦合的第一端，以及模拟地接地的第二端。 在一个实施例中，反馈放大器还包括耦合到分压器的第一端和运算放大器的输出端的第一开关，以及耦合到分压器的内部节点的第二开关。 在一个实施例中，反馈放大器被配置为当第一开关断开并且第二开关闭合时提供衰减。

公开(公告)号：US20100127772A1

公开(公告)日：2010-05-27

申请号：US12276253

申请日：2008-11-21

申请人： VINCENT MUI ,  Lance Wong ,  Aditya Raina

发明人： VINCENT MUI ,  Lance Wong ,  Aditya Raina

IPC分类号： H03G3/20 ,  H03F1/00

CPC分类号： H03G1/0035 ,  H03F3/187 ,  H03F3/45475 ,  H03F2200/03 ,  H03F2200/411 ,  H03F2203/45522 ,  H03F2203/45591 ,  H03F2203/45611 ,  H03F2203/45688 ,  H03F2203/45721 ,  H03G7/002

摘要： A feedback amplifier includes an operational amplifier having an input end and an output end. A first resistor is coupled with the input end of the operational amplifier. A second resistor has a first end coupled with the input end of the operational amplifier and a second end coupled with the output end of the amplifier. A voltage divider has a first end being operably coupled with the output end of the operational amplifier and a second end being analog grounded. In an embodiment, the feedback amplifier further includes a first switch coupled to the first end of the voltage divider and the output end of the operational amplifier, and a second switch coupled to an internal node of the voltage divider. In an embodiment, the feedback amplifier is configured to provide attenuation when the first switch is open and second switch is closed.

摘要翻译： 反馈放大器包括具有输入端和输出端的运算放大器。 第一电阻器与运算放大器的输入端耦合。 第二电阻器具有与运算放大器的输入端耦合的第一端和与放大器的输出端耦合的第二端。 分压器具有可操作地与运算放大器的输出端耦合的第一端，以及模拟地接地的第二端。 在一个实施例中，反馈放大器还包括耦合到分压器的第一端和运算放大器的输出端的第一开关，以及耦合到分压器的内部节点的第二开关。 在一个实施例中，反馈放大器被配置为当第一开关断开并且第二开关闭合时提供衰减。

公开(公告)号：US5250911A

公开(公告)日：1993-10-05

申请号：US871861

申请日：1992-04-20

申请人： Lloyd F. Linder ,  Dwight D. Birdsall

发明人： Lloyd F. Linder ,  Dwight D. Birdsall

IPC分类号： H03F1/32 ,  H03F3/30 ,  H03F3/45 ,  H03F3/50 ,  H03F1/14

CPC分类号： H03F1/3211 ,  H03F1/3217 ,  H03F1/3276 ,  H03F3/3081 ,  H03F3/45071 ,  H03F3/45098 ,  H03F3/50 ,  H03F3/505 ,  H03F2203/45578 ,  H03F2203/45611 ,  H03F2203/45612 ,  H03F2203/45641 ,  H03F2203/45721

摘要： A compensating transistor (Q5) is connected in series with the collector of a main transistor (Q3), and a level shifted replica (Vin+V1) of an input signal (Vin) is applied to the base of the compensating transistor (Q5) to maintain a constant voltage difference between the base and collector of the main transistor (Q3) and compensate for base width modulation .DELTA.Vce. A voltage-controlled current source (S1) is responsive to the input signal (Vin) and applies a compensating current .DELTA.Iload which is equal and opposite to the load current variation caused by a change (.DELTA.Vin) in the input voltage (Vin) to the emitter of the main transistor (Q3) to compensate for load current modulation .DELTA.Vbe. Alternatively, the compensating current can be applied to the junction of the base of the main transistor (Q3) and the emitter of pre-distortion transistor (Q4) which has a base connected to receive the input signal (Vin). Another compensating transistor (Q12) applies a current (.DELTA.Ib) which is equal and opposite to a non-linear base current variation to the emitter or collector of the main transistor (Q3) to compensate for current gain modulation .DELTA.Ib. The modulation compensation arrangements are applicable to common-collector, commonbase and common emitter amplifiers in single-ended and differential configurations, and to substantially all bipolar and field-effect transistor technologies.