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1. 发明公开

CN101202537A 低功率可变增益放大器失效
公开(公告)号：CN101202537A
公开(公告)日：2008-06-18
申请号：CN200710193837.2
申请日：2007-11-26
申请人：慧国(上海)软件科技有限公司 , 慧荣科技股份有限公司
发明人：白承昊 , 黄明运
IPC分类号： H03G1/04 , H03F3/45 , G05F1/46 , G05F1/56
CPC分类号： H03F3/4508 , H03F2200/91 , H03F2203/45271 , H03F2203/45294 , H03F2203/45306 , H03F2203/45631 , H03F2203/45702 , H03G1/0023
摘要：本发明提供一种具有直流(DC)偏压稳定器的低功率可变增益放大器。该低功率可变增益放大器包含：负载块，第一及第二负载电流自第一源电压流经该负载块；第一差分输入信号源，其包含连接至第二源电压的端子及连接至可变增益放大块的另一端子，并吸收对应于第一差分输入电流信号值的电流；第二差分输入信号源，其包含连接至该第二源电压的端子及连接至可变增益放大块的另一端子，并吸收对应于第二差分输入电流信号值的电流；可变增益放大块，其因应第一及第二增益控制信号以及第一及第二差分输入电流信号而吸收第一及第二差分输出电流信号以及第一及第二相消性补偿电流信号，其中第一及第二差分输出电流信号分别是第一及第二负载电流的分支电流；以及DC偏压稳定器，其处理第一及第二相消性补偿电流信号以及第一及第二偏流，以使第一及第二负载电流包含固定的DC电流分量，其中所述第一及第二偏流分别是第一及第二负载电流的分支电流，其中吸收至第一及第二差分输入信号源的电流包含DC电流分量及AC电流分量，第一与第二差分输入信号源的DC电流分量具有相同的值，且其AC电流分量具有180°的相位差。

2. 发明授权

CN101202537B 低功率可变增益放大器失效
公开(公告)号：CN101202537B
公开(公告)日：2010-11-17
申请号：CN200710193837.2
申请日：2007-11-26
申请人：慧国(上海)软件科技有限公司 , 慧荣科技股份有限公司
发明人：白承昊 , 黄明运
IPC分类号： H03G1/04 , H03F3/45 , G05F1/46 , G05F1/56
CPC分类号： H03F3/4508 , H03F2200/91 , H03F2203/45271 , H03F2203/45294 , H03F2203/45306 , H03F2203/45631 , H03F2203/45702 , H03G1/0023
摘要：本发明提供一种具有直流(DC)偏压稳定器的低功率可变增益放大器。该低功率可变增益放大器包含：负载块，第一及第二负载电流自第一源电压流经该负载块；第一差分输入信号源，其包含连接至第二源电压的第一端子及连接至可变增益放大块的第二端子，并吸收对应于第一差分输入电流信号值的电流；第二差分输入信号源，其包含连接至该第二源电压的第一端子及连接至可变增益放大块的第二端子，并吸收对应于第二差分输入电流信号值的电流；可变增益放大块，其根据第一及第二增益控制信号以及第一及第二差分输入电流信号而吸收第一及第二差分输出电流信号以及第一及第二相消性补偿电流信号，其中第一及第二差分输出电流信号分别是第一及第二负载电流的分支电流；以及DC偏压稳定器，其处理第一及第二相消性补偿电流信号以及第一及第二偏流，以使第一及第二负载电流包含固定的DC电流分量，其中所述第一及第二偏流分别是第一及第二负载电流的分支电流，其中吸收至第一及第二差分输入信号源的电流包含DC电流分量及AC电流分量，第一与第二差分输入信号源的DC电流分量具有相同的值，且其AC电流分量具有180°的相位差。

3. 发明申请

US20080122540A1 LOW-POWER VARIABLE GAIN AMPLIFIER 有权
标题翻译：低功耗可变增益放大器
公开(公告)号：US20080122540A1
公开(公告)日：2008-05-29
申请号：US11938363
申请日：2007-11-12
申请人： Sung Ho BECK , Myung Woon HWANG
发明人： Sung Ho BECK , Myung Woon HWANG
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F2200/91 , H03F2203/45271 , H03F2203/45294 , H03F2203/45306 , H03F2203/45631 , H03F2203/45702 , H03G1/0023
摘要： Provided is a low-power variable gain amplifier having a direct-current (DC) bias stabilizer. The low-power variable gain amplifier includes: a load block through which first and second load currents flow from a first source voltage; a first differential input signal source including a terminal connected to a second source voltage and the other terminal connected to a variable gain amplifying block and sinking currents corresponding to a value of a first differential input current signal; a second differential input signal source including a terminal connected to the second source voltage and the other terminal connected to the variable gain amplifying block and sinking currents corresponding to a value of a second differential input current signal; a variable gain amplifying block sinking first and second differential output current signals that are branch currents of the first and load currents, respectively, and first and second destructive-compensation current signals in response to first and second gain control signals and the first and second differential input current signals; and the DC bias stabilizer processing the first and second destructive-compensation current signals and first and second bias currents that are branch currents of the first and second load currents, respectively, to enable the first and second load currents to include fixed DC current components, wherein the currents sunk to the first and second differential input signal sources include DC current components and AC current components, the DC current components of the first and second differential input signal sources have the same value, and the AC current components thereof have a phase difference of 180°.
摘要翻译：提供了具有直流（DC）偏置稳定器的低功率可变增益放大器。低功率可变增益放大器包括：第一和第二负载电流从第一源电压流过的负载块; 第一差分输入信号源，包括连接到第二源电压的端子和连接到可变增益放大块的另一端子和与第一差分输入电流信号的值相对应的吸收电流; 第二差分输入信号源，包括连接到第二源电压的端子，连接到可变增益放大块的另一端和与第二差分输入电流信号的值相对应的吸收电流; 一个可变增益放大块分别吸收作为第一和负载电流的分支电流的第一和第二差分输出电流信号，以及响应于第一和第二增益控制信号的第一和第二破坏性补偿电流信号，以及第一和第二差分输入电流信号; 并且所述DC偏置稳定器分别处理所述第一和第二破坏补偿电流信号以及作为所述第一和第二负载电流的分支电流的第一和第二偏置电流，以使得所述第一和第二负载电流能够包括固定的DC电流分量，其中，所述第一和第二差分输入信号源的电流包括直流电流分量和交流电流分量，所述第一和第二差分输入信号源的直流电流分量具有相同的值，并且其交流电流分量具有相位差 180°。

4. 发明授权

US07508265B2 Rail-to-rail class-AB operational amplifier 有权
标题翻译：轨至轨AB类运算放大器
公开(公告)号：US07508265B2
公开(公告)日：2009-03-24
申请号：US11978650
申请日：2007-10-30
申请人： Kun-Tsung Lin
发明人： Kun-Tsung Lin
IPC分类号： H03F3/45
CPC分类号： H03F3/3022 , H03F3/4521 , H03F3/45219 , H03F3/45237 , H03F2203/45236 , H03F2203/45244 , H03F2203/45271 , H03F2203/45272 , H03F2203/45281 , H03F2203/45318 , H03F2203/45632
摘要： A rail-to-rail class-AB operational amplifier includes a first differential pair unit for receiving a pair of differential signals and generating a first control signal; a second differential pair unit for receiving the pair of differential signals and generating a second control signal; and an output stage for receiving the first control signal and the second control signal and then generating an output voltage. The first differential pair unit includes a first active load, a first transistor differential pair and a first current source. The second differential pair unit includes a second current source, a second transistor differential pair and a second active load. The output stage includes a third current source, a fourth current source and a parallel transistor pair disposed between a second terminal of the third current source and a first terminal of the fourth current source, a first output transistor and a second output transistor, and generates the output voltage according to the first control signal and the second control signal.
摘要翻译：轨到轨AB类运算放大器包括：第一差分对单元，用于接收一对差分信号并产生第一控制信号; 第二差分对单元，用于接收所述一对差分信号并产生第二控制信号; 以及输出级，用于接收第一控制信号和第二控制信号，然后产生输出电压。第一差分对单元包括第一有源负载，第一晶体管差分对和第一电流源。第二差分对单元包括第二电流源，第二晶体管差分对和第二有源负载。输出级包括第三电流源，第四电流源和设置在第三电流源的第二端和第四电流源的第一端之间的并联晶体管对，第一输出晶体管和第二输出晶体管，并且产生根据第一控制信号和第二控制信号的输出电压。

5. 发明申请

US20090289716A1 Amplifier circuit having dynamically biased configuration 有权
标题翻译：具有动态偏置配置的放大器电路
公开(公告)号：US20090289716A1
公开(公告)日：2009-11-26
申请号：US12154648
申请日：2008-05-23
申请人： Kent Jaeger , Lawrence E. Connell
发明人： Kent Jaeger , Lawrence E. Connell
IPC分类号： H03F3/45
CPC分类号： H03F1/0272 , H03F3/195 , H03F3/45183 , H03F2200/24 , H03F2200/451 , H03F2203/45271 , H03F2203/45292 , H03F2203/45322 , H03F2203/45581 , H03F2203/45612
摘要： Methods and corresponding systems for amplifying an input signal include inputting first and second differential input signals into first and second circuit legs, respectively, wherein the first circuit leg includes a first transistor coupled in series with a first variable current source, and wherein the second circuit leg includes a second transistor coupled in series with a second variable current source. The first and second variable current sources are dynamically set to provide first and second bias currents in response to the first and second differential input signals, wherein the first bias current is set inversely proportional to the second bias current. The first and second bias currents are sunk in the first and second circuit legs, respectively. First and second differential output signals are output from the first and second circuit legs, respectively.
摘要翻译：用于放大输入信号的方法和相应系统包括分别将第一和第二差分输入信号输入到第一和第二电路支路，其中第一电路支路包括与第一可变电流源串联耦合的第一晶体管，并且其中第二电路腿包括与第二可变电流源串联耦合的第二晶体管。动态地设置第一和第二可变电流源以响应于第一和第二差分输入信号提供第一和第二偏置电流，其中第一偏置电流与第二偏置电流成反比地设定。第一和第二偏置电流分别在第一和第二电路支路中沉没。第一和第二差分输出信号分别从第一和第二电路支路输出。

6. 发明授权

US07521997B2 Low-power variable gain amplifier 有权
标题翻译：低功率可变增益放大器
公开(公告)号：US07521997B2
公开(公告)日：2009-04-21
申请号：US11938363
申请日：2007-11-12
申请人： Sung Ho Beck , Myung Woon Hwang
发明人： Sung Ho Beck , Myung Woon Hwang
IPC分类号： H03F3/45
CPC分类号： H03F3/4508 , H03F2200/91 , H03F2203/45271 , H03F2203/45294 , H03F2203/45306 , H03F2203/45631 , H03F2203/45702 , H03G1/0023
摘要： Provided is a low-power variable gain amplifier having a direct-current (DC) bias stabilizer. The low-power variable gain amplifier includes: a load block through which first and second load currents flow from a first source voltage; a first differential input signal source including a terminal connected to a second source voltage and the other terminal connected to a variable gain amplifying block and sinking currents corresponding to a value of a first differential input current signal; a second differential input signal source including a terminal connected to the second source voltage and the other terminal connected to the variable gain amplifying block and sinking currents corresponding to a value of a second differential input current signal; a variable gain amplifying block sinking first and second differential output current signals that are branch currents of the first and load currents, respectively, and first and second destructive-compensation current signals, in response to first and second gain control signals and the first and second differential input current signals; and the DC bias stabilizer processing the first and second destructive-compensation current signals and first and second bias currents that are branch currents of the first and second load currents, respectively, to enable the first and second load currents to include fixed DC current components, wherein the currents sunk to the first and second differential input signal sources include DC current components and AC current components, the DC current components of the first and second differential input signal sources have the same value, and the AC current components thereof have a phase difference of 180°.
摘要翻译：提供了具有直流（DC）偏置稳定器的低功率可变增益放大器。低功率可变增益放大器包括：第一和第二负载电流从第一源电压流过的负载块; 第一差分输入信号源，包括连接到第二源电压的端子和连接到可变增益放大块的另一端子和与第一差分输入电流信号的值相对应的吸收电流; 第二差分输入信号源，包括连接到第二源电压的端子，连接到可变增益放大块的另一端和与第二差分输入电流信号的值相对应的吸收电流; 可变增益放大块，分别作为第一和负载电流的分支电流以及第一和第二破坏补偿电流信号分别吸收作为第一和第二增益控制信号的第一和第二差分输出电流信号，以及第一和第二增益控制信号差分输入电流信号; 并且所述DC偏置稳定器分别处理所述第一和第二破坏补偿电流信号以及作为所述第一和第二负载电流的分支电流的第一和第二偏置电流，以使得所述第一和第二负载电流能够包括固定的DC电流分量，其中，所述第一和第二差分输入信号源的电流包括直流电流分量和交流电流分量，所述第一和第二差分输入信号源的直流电流分量具有相同的值，并且其交流电流分量具有相位差 180°。

7. 发明授权

US07733181B2 Amplifier circuit having dynamically biased configuration 有权
标题翻译：具有动态偏置配置的放大器电路
公开(公告)号：US07733181B2
公开(公告)日：2010-06-08
申请号：US12154648
申请日：2008-05-23
申请人： Kent Jaeger , Lawrence E. Connell
发明人： Kent Jaeger , Lawrence E. Connell
IPC分类号： H03F3/45
CPC分类号： H03F1/0272 , H03F3/195 , H03F3/45183 , H03F2200/24 , H03F2200/451 , H03F2203/45271 , H03F2203/45292 , H03F2203/45322 , H03F2203/45581 , H03F2203/45612
摘要： Methods and corresponding systems for amplifying an input signal include inputting first and second differential input signals into first and second circuit legs, respectively, wherein the first circuit leg includes a first transistor coupled in series with a first variable current source, and wherein the second circuit leg includes a second transistor coupled in series with a second variable current source. The first and second variable current sources are dynamically set to provide first and second bias currents in response to the first and second differential input signals, wherein the first bias current is set inversely proportional to the second bias current. The first and second bias currents are sunk in the first and second circuit legs, respectively. First and second differential output signals are output from the first and second circuit legs, respectively.
摘要翻译：用于放大输入信号的方法和相应系统包括分别将第一和第二差分输入信号输入到第一和第二电路支路，其中第一电路支路包括与第一可变电流源串联耦合的第一晶体管，并且其中第二电路腿包括与第二可变电流源串联耦合的第二晶体管。动态地设置第一和第二可变电流源以响应于第一和第二差分输入信号提供第一和第二偏置电流，其中第一偏置电流与第二偏置电流成反比地设定。第一和第二偏置电流分别在第一和第二电路支路中沉没。第一和第二差分输出信号分别从第一和第二电路支路输出。

8. 发明授权

US5465073A Differential amplifier adapted to be integrated in C-MOS monolithic IC 失效
标题翻译：差分放大器适用于集成在C-MOS单片IC中
公开(公告)号：US5465073A
公开(公告)日：1995-11-07
申请号：US289746
申请日：1994-08-12
申请人： Noritoshi Satoh
发明人： Noritoshi Satoh
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F3/45183 , H03F3/4565 , H03F3/45659 , H03F2200/153 , H03F2203/45036 , H03F2203/45074 , H03F2203/45134 , H03F2203/45188 , H03F2203/45271 , H03F2203/45278 , H03F2203/45424 , H03F2203/45426 , H03F2203/45466 , H03F2203/45471 , H03F2203/45631 , H03F2203/45641 , H03F2203/45684
摘要： A differential amplifier includes an input stage differential amplifier circuit and an output stage differential amplifier circuit. Differential common-mode output voltages of the output stage differential amplifier circuit are converted into common-mode currents by transistors having sources connected in common. The common-mode currents are taken as input mirror currents of a current mirror circuit. Output mirror currents of the current mirror circuit are supplied to the drain side as output electrode of a constant current transistor of the input stage differential amplifier circuit to form a common-mode feedback circuit. Since the common-mode feedback circuit is constructed only by the common-mode voltage/current converting transistors and the current mirror circuit, the feedback paths can be reduced to establish a transfer function with a single pole for stability of operation of the differential amplifier.
摘要翻译：差分放大器包括输入级差分放大器电路和输出级差分放大器电路。输出级差分放大器电路的差分共模输出电压由共同连接源极的晶体管转换为共模电流。共模电流作为电流镜电路的输入反射镜电流。电流镜电路的输出镜电流作为输入级差分放大电路的恒流晶体管的输出电极供给到漏极侧，形成共模反馈电路。由于共模反馈电路仅由共模电压/电流转换晶体管和电流镜电路构成，所以可以减小反馈路径以建立具有单极的传递函数，以使差分放大器的操作稳定。

9. 发明公开

EP0641069A1 Differential amplifier 失效
标题翻译：差分放大器
公开(公告)号：EP0641069A1
公开(公告)日：1995-03-01
申请号：EP94113227.6
申请日：1994-08-24
申请人： NEC CORPORATION
发明人： Satoh, Noritoshi, c/o NEC Corporation
IPC分类号： H03F3/45
CPC分类号： H03F3/45179 , H03F3/45183 , H03F3/4565 , H03F3/45659 , H03F2200/153 , H03F2203/45036 , H03F2203/45074 , H03F2203/45134 , H03F2203/45188 , H03F2203/45271 , H03F2203/45278 , H03F2203/45424 , H03F2203/45426 , H03F2203/45466 , H03F2203/45471 , H03F2203/45631 , H03F2203/45641 , H03F2203/45684
摘要： A differential amplifier includes an input stage differential amplifier circuit and an output stage differential amplifier circuit. Differential common-mode output voltages of the output stage differential amplifier circuit are converted into common-mode currents by transistors having sources connected in common. The common-mode currents are taken as input mirror currents of a current mirror circuit. Output mirror currents of the current mirror circuit are supplied to the drain side as output electrode of a constant current transistor of the input stage differential amplifier circuit to form a common-mode feedback circuit. Since the common-mode feedback circuit is constructed only by the common-mode voltage/current converting transistors and the current mirror circuit, the feedback paths can be reduced to establish a transfer function with a single pole for stability of operation of the differential amplifier.
摘要翻译：差分放大器包括输入级差分放大器电路和输出级差分放大器电路。输出级差分放大器电路的差分共模输出电压由具有共同连接的源极的晶体管转换为共模电流。共模电流被视为电流镜像电路的输入镜像电流。电流镜像电路的输出镜像电流作为输入级差分放大器电路的恒流晶体管的输出电极被提供给漏极侧以形成共模反馈电路。由于共模反馈电路仅由共模电压/电流转换晶体管和电流镜像电路构成，所以可以减小反馈路径以建立具有单极点的传递函数，以用于差分放大器的操作的稳定性。

10. 发明公开

EP0459070A1 High slew-rate operational amplifier with bias controlled by the input differential signal 失效
标题翻译：运算放大器具有大输出信号斜率，并用输入的差分信号控制偏置。
公开(公告)号：EP0459070A1
公开(公告)日：1991-12-04
申请号：EP90830247.4
申请日：1990-05-31
申请人： SGS-THOMSON MICROELECTRONICS S.r.l.
发明人： Gola, Alberto , Salina, Alberto
IPC分类号： H03F1/02 , H03F3/45 , H03F1/32
CPC分类号： H03F1/0261 , H03F1/3217 , H03F3/45071 , H03F2203/45188 , H03F2203/45271 , H03F2203/45281 , H03F2203/45346 , H03F2203/45471
摘要： An operational amplifier employs split collector transistors (Q₁, Q₂) for the input differential pair. Through a fractional collector of the input transistors (Q₁, Q₂) a fraction of the currents (1/4) flowing through the two branches of the input differential stage is derived and by means of two complementary mirrors (Q₉ - Q₁₂) having a sufficiently high, combined mirror-ratio, this current, which is proportional to the amplitude of the signal present across the input terminals of the amplifier, is fed as a biasing current (I) to the input node of the output buffer stage (Q x , Q y ) of the amplifier in order to enhance the slew-rate behaviour by ensuring a fast charging of the frequency compensation capacitance (C c ) during a transient condition while maintaining a low power dissipation under small signal steady state conditions.
摘要翻译：运算放大器采用用于输入差分对分开集电极晶体管（Q1，Q2）。通过流经输入差分级的两个分支输入晶体管（Q1，Q2）（1/4）中的电流的一小部分的分数集电极导出并通过两个互补的反射镜（Q9 - Q12）的方式具有足够高，组合镜面比率，该电流，所有这一切都正比于本在放大器的输入端的信号的振幅，被馈送作为施力电流（I）输出到输出缓冲级的输入节点（QX，QY ）为了提高由瞬态条件期间确保几乎充电频率补偿电容（CC），同时保持小信号稳态条件下具有低功耗的转换速率行为放大器。

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