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11. 发明授权

US07187235B2 Class AB rail-to-rail operational amplifier 有权
标题翻译： AB类轨至轨运算放大器
公开(公告)号：US07187235B2
公开(公告)日：2007-03-06
申请号：US10946222
申请日：2004-09-21
申请人： Kyeong-Tae Moon
发明人： Kyeong-Tae Moon
IPC分类号： H03F3/45
CPC分类号： H03F3/45219 , H03F1/308 , H03F1/3217 , H03F3/3028
摘要： The static bias current of the output stage circuit of the class AB rail-to-rail operational amplifier is controlled by the external bias control signals. The class AB rail-to-rail operational amplifier receives the external bias control signals and controls the bias voltage of the output stage circuit, and thus the static bias current of the output stage circuit may be controlled. The class AB rail-to-rail operational amplifier may further include a frequency compensation circuit for compensating high frequency characteristics of the operational amplifier.
摘要翻译： AB类轨至轨运算放大器的输出级电路的静态偏置电流由外部偏置控制信号控制。 AB类轨至轨运算放大器接收外部偏置控制信号并控制输出级电路的偏置电压，从而可以控制输出级电路的静态偏置电流。 AB类轨至轨运算放大器还可以包括用于补偿运算放大器的高频特性的频率补偿电路。

12. 发明申请

US20070040608A1 Feedback controller for PWM amplifier 有权
标题翻译： PWM放大器的反馈控制器
公开(公告)号：US20070040608A1
公开(公告)日：2007-02-22
申请号：US11225845
申请日：2005-09-14
申请人： Anthony Magrath , John Westlake
发明人： Anthony Magrath , John Westlake
IPC分类号： H03F3/38
CPC分类号： H03F3/30 , H03F1/32 , H03F1/3217 , H03F1/34 , H03F3/217 , H03F3/2173 , H03F2200/351 , H03F2200/78
摘要： A feedback controller in a PWM amplifier comprises a signal input for receiving a pulse width modulated (PWM) input signal (Vin) whose duty cycle represents a desired analogue output signal. A feedback loop filter 518 generates a filtered error signal (Vint) comprising a filtered representation of differences between the input signal (Vin) and a feedback signal (Vfb). A comparator (520) compares the filtered error signal with a reference to generate a provisional PWM switching control signal (C) for controlling the PWM amplifier (500). A pulse conditioner (532) receives both the provisional PWM switching control signal (C) and the PWM input signal (X=Vin) and outputs to the amplifier (500) a conditioned PWM switching control signal (Y), modified in accordance with predetermined constraints in relation to the PWM input signal. The pulse conditioner includes a single pulse function (534) whereby only a single pulse is permitted for every pulse in the input signal, thereby eliminating oscillations that can otherwise Occur under over-voltage supply conditions. Missing pulse and minimum pulse width functions (536, 538) can also be provided.
摘要翻译： PWM放大器中的反馈控制器包括用于接收其占空比表示期望的模拟输出信号的脉宽调制（PWM）输入信号（Vin）的信号输入。反馈环路滤波器518产生包括输入信号（Vin）和反馈信号（Vfb）之间的差分滤波表示的滤波误差信号（Vint）。比较器（520）将滤波的误差信号与基准进行比较，以产生用于控制PWM放大器（500）的临时PWM切换控制信号（C）。脉冲调节器（532）同时接收临时PWM切换控制信号（C）和PWM输入信号（X = Vin），并且向放大器（500）输出经调节的PWM切换控制信号（Y），根据预定的PWM切换控制信号与PWM输入信号有关的约束。脉冲调节器包括单脉冲功能（534），由此仅对输入信号中的每个脉冲仅允许单个脉冲，从而消除在过电压供应条件下可能发生的振荡。也可以提供缺少脉冲和最小脉冲宽度功能（536,538）。

13. 发明授权

US07064607B2 Bias system and method 有权
标题翻译：偏差系统和方法
公开(公告)号：US07064607B2
公开(公告)日：2006-06-20
申请号：US10748986
申请日：2003-12-29
申请人： Kenneth George Maclean , Suribhotla Venkata Rajasekhar , David John Baldwin , Marco Corsi , Tobin Hagan
发明人： Kenneth George Maclean , Suribhotla Venkata Rajasekhar , David John Baldwin , Marco Corsi , Tobin Hagan
IPC分类号： H03G3/20
CPC分类号： H03F1/0261 , H03F1/3217 , H03F3/3022
摘要： A bias device that modifies the bias of a device based on an input signal to the device. The device may have a fixed bias, and the bias device can be connected in parallel with the fixed bias. The device can be an amplifier, such as a linear amplifier or a class AB amplifier. The bias device can be configured to provide maximum bias during the device's crossover time period.
摘要翻译：一种偏置装置，其基于装置的输入信号修改装置的偏置。该装置可以具有固定偏置，并且偏置装置可以与固定偏压并联连接。该器件可以是放大器，例如线性放大器或AB类放大器。偏置器件可以配置为在器件的交叉时间段期间提供最大偏置。

14. 发明申请

US20040080371A1 METHOD OF INCREASING OUTPUT CURRENT CAPABILITY OF NEGATIVE FEEDBACK AMPLIFIERS WITH OUTPUT CURRENT LIMITING AND FREEDOM FROM THERMAL RUNAWAY 有权
标题翻译：负极反馈放大器输出电流限制和自发热阻的输出电流能力的方法
公开(公告)号：US20040080371A1
公开(公告)日：2004-04-29
申请号：US10095215
申请日：2002-03-11
发明人： James K. Waller JR. , Derek F. Bowers
IPC分类号： H03F003/52
CPC分类号： H03F3/3069 , H03F1/302 , H03F1/3217 , H03F1/34 , H03F1/52 , H03F2203/30057
摘要： A high output current negative feedback power amplifier amplifies an input signal by use of a monolithic operated amplifier with a current limiting resistor in its output path. The output current of the amplifier is automatically increased when the voltage drop across the current limiting resistor increases beyond a predetermined point and global current limiting automatically occurs when the output current of the monolithic amplifier exceeds a predetermined point.
摘要翻译：高输出电流负反馈功率放大器通过使用其输出路径中的限流电阻器的单片操作放大器来放大输入信号。当电流限制电阻上的电压降超过预定点时，放大器的输出电流自动增加，当单片放大器的输出电流超过预定点时，全局电流限制自动发生。

15. 发明授权

US06586997B1 Input distortion correction current-feedback amplifier system 有权
标题翻译：输入失真校正电流反馈放大器系统
公开(公告)号：US06586997B1
公开(公告)日：2003-07-01
申请号：US10060829
申请日：2002-01-30
申请人： Stefano D'Aquino , Kimo Y. F. Tam
发明人： Stefano D'Aquino , Kimo Y. F. Tam
IPC分类号： H03F345
CPC分类号： H03F1/305 , H03F1/3217 , H03F3/45475
摘要： An input distortion correction current-feedback amplifier system includes a current mirror; an input stage connected to the input of the current mirror; an output stage connected to the output of the current mirror; a feedback circuit connected from the output stage to the input stage; a compensation impedance connected to the output of the current mirror; and a distortion correction circuit for sensing the distortion voltage across the input stage and providing to the current mirror a current representative of the distortion voltage for delivering to the compensation impedance a correction current to develop a correction voltage at the input of the output stage to nullify the effect of the distortion voltage.
摘要翻译：输入失真校正电流反馈放大器系统包括电流镜; 连接到电流镜的输入的输入级; 连接到电流镜的输出的输出级; 从输出级连接到输入级的反馈电路; 连接到电流镜的输出的补偿阻抗; 以及失真校正电路，用于感测输入级两端的失真电压，并向电流反射镜提供代表失真电压的电流，以将补偿阻抗传送到校正电流，以在输出级的输入端产生校正电压，使之无效失真电压的影响。

16. 发明授权

US06392484B1 Amplifier with combined pulsed energy output and linear type output 失效
标题翻译：具有组合脉冲能量输出和线性输出的放大器
公开(公告)号：US06392484B1
公开(公告)日：2002-05-21
申请号：US09628591
申请日：2000-07-31
申请人： Mark K. Takita
发明人： Mark K. Takita
IPC分类号： H03F3217
CPC分类号： H03F3/217 , H03F1/3217 , H03F3/3081
摘要： A single stage amplifier system that produces an accurate linear output signal during low power demands and a pulse modulated output signal during high power demands is disclosed. A control circuit provides a linear signal and a pulsed signal to an output stage in response to a select signal provided by an external circuit. The single output stage includes two transistors in a push-pull arrangement that can be driven in their saturation regions when a pulsed signal is provided by the control circuit or driven within their linear region when a linear signal is provided. The single stage amplifier system can be used in either a half bridge amplifier system or an H-bridge amplifier system.
摘要翻译：公开了一种单级放大器系统，其在低功率需求期间产生精确的线性输出信号，并且在高功率需求期间产生脉冲调制输出信号。控制电路响应于由外部电路提供的选择信号而向输出级提供线性信号和脉冲信号。单个输出级包括推挽装置中的两个晶体管，当提供线性信号时，当由控制电路提供脉冲信号或者在其线性区域内驱动脉冲信号时，该晶体管可在其饱和区域中被驱动。单级放大器系统可用于半桥放大器系统或H桥放大器系统。

17. 发明申请

US20010050594A1 Negative feed-back amplifier and method for negative feed-back 失效
标题翻译：负反馈放大器和负反馈方法
公开(公告)号：US20010050594A1
公开(公告)日：2001-12-13
申请号：US09872730
申请日：2001-06-01
申请人： NEC Corporation
发明人： Tsuyoshi Matsushita
IPC分类号： H03F003/26
CPC分类号： H03F1/3217 , H03F1/307
摘要： A negative feed-back amplifier is provided in which a distortion of signals is reduced and a dynamic range is increased. An input signal is input to a base of a transistor and is output from a collector as a reversed signal and a non-reversed signal is output from an emitter. The reversed signal is input to a base of a transistor and is output through a resistor from an emitter of the transistor. The non-reversed signal is input through a condenser to a base of a transistor and is output from a collector in a reversed form. An output signal from the transistor is input to an emitter follower of a transistor at high input impedance and output at low output impedance and then attenuated by resistors and negative feed-back signal is produced. The negative feed-back signal is input through a resistor to a base of the transistor to be added to the input signal.
摘要翻译：提供了一种负反馈放大器，其中信号的失真减小并且动态范围增加。输入信号被输入到晶体管的基极，并且作为反向信号从集电极输出，并且从发射极输出非反相信号。反相信号被输入到晶体管的基极，并且通过来自晶体管的发射极的电阻器输出。非反转信号通过电容器输入到晶体管的基极，并以反向形式从集电极输出。来自晶体管的输出信号被输入到高输入阻抗的晶体管的射极跟随器，并以低输出阻抗输出，然后由电阻衰减并产生负反馈信号。负反馈信号通过电阻器输入到晶体管的基极以添加到输入信号。

18. 发明授权

US6150853A Integrated unit gain output stage 失效
标题翻译：集成单位增益输出级
公开(公告)号：US6150853A
公开(公告)日：2000-11-21
申请号：US394688
申请日：1995-02-27
申请人： Francesco Chrappan , Maurizio Nessi , Alberto Salina
发明人： Francesco Chrappan , Maurizio Nessi , Alberto Salina
IPC分类号： H03F3/20 , H02P25/034 , H03F1/32 , H03F3/30 , H03F3/347 , H03K3/00
CPC分类号： H03F3/3062 , H02P25/034 , H03F1/3217 , H03F3/3037 , H03F2203/30057 , H03F2203/30096 , H03F2203/30129
摘要： The operation of externally connected output power transistors of a class AB amplifier is controlled without employing any external sensing resistance of the output current by driving an externally connected power transistor through a level shifting buffer and employing a limiting network composed of an integrated transistor driven by the output of a signal amplifying stage and a resistance connected in series with its drain. The buffer stage shifts the level of the driving signal of the external power transistor by a value equal to the threshold voltage of the integrated transistor of the limiting network thus ensuring the turn-off of the external power transistor under quiescent conditions.
摘要翻译：通过驱动外部连接的功率晶体管通过电平移位缓冲器来控制AB类放大器的外部连接的输出功率晶体管的操作，而不采用输出电流的任何外部感测电阻，并采用由由信号放大级的输出和与其漏极串联的电阻。缓冲级将外部功率晶体管的驱动信号的电平移动到等于限制网络的集成晶体管的阈值电压的值，从而确保在静态条件下外部功率晶体管的截止。

19. 发明授权

US5754066A Output stage for buffering an electrical signal and method for performing the same 失效
标题翻译：用于缓冲电信号的输出级及其执行方法
公开(公告)号：US5754066A
公开(公告)日：1998-05-19
申请号：US665370
申请日：1996-06-19
申请人： Douglas L. Smith
发明人： Douglas L. Smith
IPC分类号： H03F1/32 , H03F3/30 , H03B1/00 , H03F3/04
CPC分类号： H03F3/3076 , H03F1/3217
摘要： The present invention teaches a variety of output stages, buffer circuits, and power amplifiers as well as methods for buffering electrical signals. According to one embodiment of the present invention, an output stage includes an input, an output, an error stage coupled between the input and the output and responsive to a difference between an input signal present on the input and an output signal present on the output, the error stage being operative to generate a current control signal related to the difference between the input signal and the output signal, a current mirror coupled to the error stage and responsive to the current control signal to generate a demand driven current signal related to a magnitude of the current control signal, and an amplification stage coupled between the input and the output. Furthermore, the amplification stage is responsive to the input signal and to the demand driven current signal to generate the output signal on the output such that a voltage of the output signal is substantially equal to a voltage of the input signal. Some embodiments provide a unipolar output signal while other embodiments provide a bipolar output signal. In addition, a number of embodiments utilizing bipolar transistor technology, FET technology, and having different configurations which vary the current gain are taught.
摘要翻译：本发明教导了各种输出级，缓冲电路和功率放大器以及用于缓冲电信号的方法。根据本发明的一个实施例，输出级包括输入，输出，耦合在输入和输出之间的误差级，并且响应输入端上存在的输入信号与输出端之间的输出信号之间的差值，所述误差级用于产生与所述输入信号和所述输出信号之间的差相关的电流控制信号，耦合到所述误差级的电流镜，并且响应于所述电流控制信号以产生与所述输出信号相关的需求驱动电流信号电流控制信号的大小以及耦合在输入和输出之间的放大级。此外，放大级响应于输入信号和需求驱动电流信号，以在输出端产生输出信号，使得输出信号的电压基本上等于输入信号的电压。一些实施例提供单极输出信号，而其他实施例提供双极性输出信号。此外，教导了利用双极晶体管技术，FET技术并且具有改变电流增益的不同配置的多个实施例。

20. 发明授权

US5412309A Current amplifiers 失效
标题翻译：电流放大器
公开(公告)号：US5412309A
公开(公告)日：1995-05-02
申请号：US20664
申请日：1993-02-22
申请人： Paul T. Ueunten
发明人： Paul T. Ueunten
IPC分类号： G05F3/26 , H03F1/32 , H03F3/30 , G05F3/16 , H03F3/45
CPC分类号： H03F3/45179 , G05F3/267 , H03F1/3217 , H03F3/3001 , H03F3/4508 , H03F2203/30021 , H03F2203/30031 , H03F2203/30096 , H03F2203/30129 , H03F2203/45188
摘要： A novel power amplifier output stage is taught which provides rail-to-rail output voltage swings, high current source and sink capability, which is capable of class AB operation to provide low distortion amplification. The power amplifier of this invention is suitable for fabrication in integrated circuit form, thereby achieving the small size necessary for use with miniaturized disk drives, as well as low cost and high reliability. A first transistor is driven by the output of a transconductance amplifier, in response to an input control current. The first transistor is configured together with the transconductance amplifier to provide a current which can be sensed and from which a feedback signal is provided to the transconductance amplifier to establish the first current having a known relationship to the input control current. A second transistor is used which is driven by the output of the transconductance amplifier, the second transistor being sized significantly larger than the first transistor, to provide a sizable output current in response to the input control current and with feedback control being provided by the first transistor. Low drop out voltage regulators using the novel current amplifiers of this invention are also taught.
摘要翻译：教导了一种新颖的功率放大器输出级，其提供轨至轨输出电压摆幅，高电流源和吸收能力，其能够进行AB类操作以提供低失真放大。本发明的功率放大器适用于以集成电路形式制造，从而实现了与小型化磁盘驱动器一起使用所需的小尺寸，以及低成本和高可靠性。响应于输入控制电流，第一晶体管由跨导放大器的输出驱动。第一晶体管与跨导放大器一起配置以提供可以被感测的电流，并且从该信号向跨导放大器提供反馈信号以建立与输入控制电流具有已知关系的第一电流。使用由跨导放大器的输出驱动的第二晶体管，第二晶体管的尺寸明显大于第一晶体管，以响应于输入控制电流提供相当大的输出电流，并且由第一晶体管提供反馈控制晶体管。还教导了使用本发明的新颖电流放大器的低压降稳压器。

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