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1. 发明申请

US20090245541A1 Audio Power Amplifier with Feedback-Shifting Technology 审中-公开
标题翻译：具有反馈转换技术的音频功率放大器
公开(公告)号：US20090245541A1
公开(公告)日：2009-10-01
申请号：US12467272
申请日：2009-05-16
申请人： Zhenwu Wang
发明人： Zhenwu Wang
IPC分类号： H03F99/00
CPC分类号： H03F3/183 , H03F1/34 , H03F3/3074 , H03F3/45085 , H03F2200/03 , H03F2200/129 , H03F2200/144 , H03F2200/408 , H03F2200/453 , H03F2200/456 , H03F2203/30051 , H03F2203/30057 , H03F2203/30078 , H03F2203/30111 , H03F2203/45392 , H03F2203/45604 , H03F2203/45674 , H03F2203/45702
摘要： A solid stage audio power amplifier comprises of two output stages with one generating the real output signal that drives the real loud speaker load and the other mimicking the real output stage and generating a dummy output signal that drives a dummy resistor load. A frequency dependent feedback selection network, denoted as Feedback-Shifting network hereafter, is implemented between the two outputs and the input of the amplifier to fulfill a unique global feedback loop. In a particular embodiment, the Feedback-Shifting network can be constructed so that it receives more feedback information from the real output node than from the dummy output node at low frequencies, but less feedback information from the real output node than from the dummy output node at mid to high frequency bands. Such a power amplifier performs as a traditional solid state feedback amplifier at low frequencies by generating a clear and tight bass, but it sounds similar to an open loop tube amplifier at higher frequencies by reproducing natural mid-band and treble with less listening fatigue.
摘要翻译：实体级音频功率放大器包括两个输出级，一个产生实际输出信号，驱动真实的扬声器负载，另一个模拟实际输出级，并产生驱动虚拟电阻器负载的虚拟输出信号。在两个输出和放大器的输入之间实现了频率相关的反馈选择网络，在下文中表示为反馈移动网络，以实现独特的全局反馈回路。在特定实施例中，反馈移动网络可被构造成使得其从低输出节点接收来自实际输出节点的更多反馈信息，而从虚拟输出节点接收来自真实输出节点的反馈信息，而不是从虚拟输出节点在中高频段。这样的功率放大器通过产生清晰和紧凑的低音来作为传统的固态反馈放大器，通过产生清晰和紧凑的低音来执行，但是通过再现自然的中频带和高音，听觉疲劳较小，听起来类似于较高频率的开环管放大器。

2. 发明申请

US20130147558A1 BUFFER CIRCUIT 有权
标题翻译：缓冲电路
公开(公告)号：US20130147558A1
公开(公告)日：2013-06-13
申请号：US13446397
申请日：2012-04-13
申请人： Sang-Yeon BYEON
发明人： Sang-Yeon BYEON
IPC分类号： H03F3/45
CPC分类号： H03K19/00361 , G11C7/1084 , H03F3/3022 , H03F2203/30042 , H03F2203/30051 , H03F2203/30057
摘要： A buffer circuit includes an amplification unit configured to amplify and output a difference between an input signal and a reference voltage; and a driver configured to drive an output node in response to the output of the amplification unit and be controlled in at least one of a pull-up driving strength and a pull-down driving strength at the output node in response to the reference voltage.
摘要翻译：缓冲电路包括：放大单元，被配置为放大和输出输入信号和参考电压之间的差; 以及驱动器，被配置为响应于放大单元的输出来驱动输出节点，并且响应于参考电压而在输出节点处被控制为上拉驱动强度和下拉驱动强度中的至少一个。

3. 发明申请

US20170324383A1 CALIBRATION OF PUSH-PULL AMPLIFIER TO A LOW SECOND ORDER DISTORTION 审中-公开
公开(公告)号：US20170324383A1
公开(公告)日：2017-11-09
申请号：US15533003
申请日：2014-12-04
申请人： Telefonaktiebolaget LM Ericsson (publ)
发明人： Henrik SJOLAND
IPC分类号： H03F1/32 , H03F3/193 , H03F3/30 , H04B1/16
CPC分类号： H03F1/3217 , H03F3/193 , H03F3/265 , H03F3/3028 , H03F3/3032 , H03F3/3071 , H03F3/3076 , H03F2200/294 , H03F2200/451 , H03F2203/30003 , H03F2203/30031 , H03F2203/30051 , H03F2203/30057 , H04B1/16
摘要： An integrated circuit comprises a first amplifier circuit with a push-pull amplifier configured to be calibrated to a low second order distortion. The integrated circuit further comprises a second amplifier circuit with at least one push-pull amplifier, wherein a size ratio between sizes of the transistors is adjustable by adjusting the size of at least one transistor device. The size ratio can be consecutively adjusted to a plurality of values, and for each value, a first output signal of a push-pull amplifier with an applied test signal and a second output signal of a push-pull amplifier without applied test signal, are determined. The size ratio for which a difference between the push-pull amplifier output signals is closest to zero is determined, and the push-pull amplifier of the first amplifier circuit is calibrated in dependence of the determined size ratio.

4. 发明授权

US07804357B2 Distributed amplifier 有权
标题翻译：分布式放大器
公开(公告)号：US07804357B2
公开(公告)日：2010-09-28
申请号：US11238064
申请日：2005-09-29
申请人： Hisao Shigematsu
发明人： Hisao Shigematsu
IPC分类号： H03F3/26
CPC分类号： H03F3/604 , H03F3/3001 , H03F3/3022 , H03F3/3037 , H03F3/3042 , H03F3/3086 , H03F3/607 , H03F2203/30051 , H03F2203/30057
摘要： In order to allow to make compact a distributed amplifier by dispensing with any choke coil and reduce its cost, the distributed amplifier is configured such that it comprises an input side transmission line, an output side transmission line, and plural amplifier circuits connected to the input side transmission line and the output side transmission line, wherein push-pull amplifier circuits are employed as the amplifier circuits.
摘要翻译：为了通过分配任何扼流线圈来制造紧凑的分布式放大器并降低其成本，分布式放大器被配置为使得它包括输入侧传输线，输出侧传输线和连接到输入端的多个放大器电路侧传输线和输出侧传输线，其中使用推挽放大器电路作为放大器电路。

5. 发明授权

US06922105B2 Operational amplifier 失效
标题翻译：运算放大器
公开(公告)号：US06922105B2
公开(公告)日：2005-07-26
申请号：US10632849
申请日：2003-08-04
申请人： Hiroshi Imai , Mitsuru Aoki , Hiroyuki Ban
发明人： Hiroshi Imai , Mitsuru Aoki , Hiroyuki Ban
IPC分类号： H03F1/52 , H03F3/30 , H03F3/45 , H03F3/26
CPC分类号： H03F3/3071 , H03F3/45183 , H03F2203/30036 , H03F2203/30051 , H03F2203/45324 , H03F2203/45352 , H03F2203/45632 , H03F2203/45708
摘要： In an operational amplifier, a differential amplifying circuit is configured to amplify an input voltage inputted from the input terminal. An outputting transistor is connected to the output terminal. A driving transistor is connected to the differential amplifying circuit and the outputting transistor. The driving transistor turns on according to a control signal supplied from the differential amplifying circuit to the driving circuit. The driving transistor is also configured to drive the outputting transistor according to the control signal. A control signal reducing circuit, when a voltage is applied on the driving transistor through the outputting transistor, is configured to reduce the control signal within a range that the driving transistor is kept to on state. The voltage applied on the driving transistor exceeds a predetermined threshold voltage.
摘要翻译：在运算放大器中，差分放大电路被配置为放大从输入端输入的输入电压。输出晶体管连接到输出端子。驱动晶体管连接到差分放大电路和输出晶体管。驱动晶体管根据从差分放大电路向驱动电路提供的控制信号导通。驱动晶体管也被配置为根据控制信号来驱动输出晶体管。当通过输出晶体管对驱动晶体管施加电压时，控制信号降低电路被配置为在驱动晶体管保持导通状态的范围内减少控制信号。施加在驱动晶体管上的电压超过预定阈值电压。

6. 发明申请

US20040021520A1 Operational amplifier 失效
标题翻译：运算放大器
公开(公告)号：US20040021520A1
公开(公告)日：2004-02-05
申请号：US10632849
申请日：2003-08-04
发明人： Hiroshi Imai , Mitsuru Aoki , Hiroyuki Ban
IPC分类号： H03F003/45
CPC分类号： H03F3/3071 , H03F3/45183 , H03F2203/30036 , H03F2203/30051 , H03F2203/45324 , H03F2203/45352 , H03F2203/45632 , H03F2203/45708
摘要： In an operational amplifier, a differential amplifying circuit is configured to amplify an input voltage inputted from the input terminal. An outputting transistor is connected to the output terminal. A driving transistor is connected to the differential amplifying circuit and the outputting transistor. The driving transistor turns on according to a control signal supplied from the differential amplifying circuit to the driving circuit. The driving transistor is also configured to drive the outputting transistor according to the control signal. A control signal reducing circuit, when a voltage is applied on the driving transistor through the outputting transistor, is configured to reduce the control signal within a range that the driving transistor is kept to on state. The voltage applied on the driving transistor exceeds a predetermined threshold voltage.
摘要翻译：在运算放大器中，差分放大电路被配置为放大从输入端输入的输入电压。输出晶体管连接到输出端子。驱动晶体管连接到差分放大电路和输出晶体管。驱动晶体管根据从差分放大电路向驱动电路提供的控制信号导通。驱动晶体管也被配置为根据控制信号来驱动输出晶体管。当通过输出晶体管对驱动晶体管施加电压时，控制信号降低电路被配置为在驱动晶体管保持导通状态的范围内减少控制信号。施加在驱动晶体管上的电压超过预定阈值电压。

7. 发明授权

US08760199B2 Buffer circuit 有权
标题翻译：缓冲电路
公开(公告)号：US08760199B2
公开(公告)日：2014-06-24
申请号：US13446397
申请日：2012-04-13
申请人： Sang-Yeon Byeon
发明人： Sang-Yeon Byeon
IPC分类号： H03B1/00 , H03K19/003
CPC分类号： H03K19/00361 , G11C7/1084 , H03F3/3022 , H03F2203/30042 , H03F2203/30051 , H03F2203/30057
摘要： A buffer circuit includes an amplification unit configured to amplify and output a difference between an input signal and a reference voltage; and a driver configured to drive an output node in response to the output of the amplification unit and be controlled in at least one of a pull-up driving strength and a pull-down driving strength at the output node in response to the reference voltage.
摘要翻译：缓冲电路包括：放大单元，被配置为放大和输出输入信号和参考电压之间的差; 以及驱动器，被配置为响应于放大单元的输出来驱动输出节点，并且响应于参考电压而在输出节点处被控制为上拉驱动强度和下拉驱动强度中的至少一个。

8. 发明申请

US20060279360A1 Distributed amplifier 有权
标题翻译：分布式放大器
公开(公告)号：US20060279360A1
公开(公告)日：2006-12-14
申请号：US11238064
申请日：2005-09-29
申请人： Hisao Shigematsu
发明人： Hisao Shigematsu
IPC分类号： H03F3/60
CPC分类号： H03F3/604 , H03F3/3001 , H03F3/3022 , H03F3/3037 , H03F3/3042 , H03F3/3086 , H03F3/607 , H03F2203/30051 , H03F2203/30057
摘要： In order to allow to make compact a distributed amplifier by dispensing with any choke coil and reduce its cost, the distributed amplifier is configured such that it comprises an input side transmission line, an output side transmission line, and plural amplifier circuits connected to the input side transmission line and the output side transmission line, wherein push-pull amplifier circuits are employed as the amplifier circuits.
摘要翻译：为了通过分配任何扼流线圈来制造紧凑的分布式放大器并降低其成本，分布式放大器被配置为使得它包括输入侧传输线，输出侧传输线和连接到输入端的多个放大器电路侧传输线和输出侧传输线，其中使用推挽放大器电路作为放大器电路。

9. 发明授权

US06222414B1 Bipolar-plus-DMOS mixed-typology power output stage 失效
标题翻译：双极加DMOS混合型功率输出级
公开(公告)号：US06222414B1
公开(公告)日：2001-04-24
申请号：US08351578
申请日：1994-12-07
申请人： Carlo Cini , Fabrizio Stefani
发明人： Carlo Cini , Fabrizio Stefani
IPC分类号： H03K300
CPC分类号： H03F3/45179 , H03F3/3008 , H03F2203/30012 , H03F2203/30051
摘要： An output power stage which includes a PNP pull-up transistor and an n-channel FET push-down transistor, driven in phase opposition. This fully complementary stage provides an outstandingly improved power handling capability per semiconductor area occupied, together with a large output voltage swing, but does not require the use of externally connected discrete boot-strap components. The bipolar pull-up transistor can optionally be driven through an FET auxiliary stage, to minimize the power requirements of the preceding signal amplification stage.
摘要翻译：输出功率级，其包括PNP上拉晶体管和n沟道FET下拉晶体管，其相位驱动。这个完全互补的阶段为每个占用的半导体面积提供了出色的功率处理能力，以及大的输出电压摆幅，但不需要使用外部连接的分立式引导部件。双极上拉晶体管可以可选地通过FET辅助级驱动，以最小化前一信号放大级的功率需求。

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