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1. 发明申请

US20090128237A1 SWITCHING AMPLIFIERS 有权
标题翻译：开关放大器
公开(公告)号：US20090128237A1
公开(公告)日：2009-05-21
申请号：US12270692
申请日：2008-11-13
申请人： Brian E. Attwood , Wilson E. Taylor , Larry E. Hand
发明人： Brian E. Attwood , Wilson E. Taylor , Larry E. Hand
IPC分类号： H03F3/217
CPC分类号： H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/271 , H03F2200/273
摘要： Systems and methods implemented in a switching amplifier for providing consistent, matching switching between top and bottom switching devices in a switching amplifier. One embodiment includes a half-bridge circuit output stage, a driver stage and a transformer. The driver stage, which drives the switches of the output stage, is very fast, has a low propagation delay, and has minimal input capacitance. The transformer drives the drive paths from the transformer inputs to the switches. The transformer avoids resonances within the audio band and at the amplifier switching frequencies, has low and spread free leakage inductance, has enough magnetizing inductance to keep transformer currents low in proportion to the total driver stage current drain, has low core losses at the switching frequency, has minimal inductance change and operates well below its saturation point. The amplifier stage provides a substantially constant amplitude drive signal to the output power switching devices.
摘要翻译：在开关放大器中实现的系统和方法，用于在开关放大器中的顶部和底部开关器件之间提供一致的匹配切换。一个实施例包括半桥电路输出级，驱动级和变压器。驱动输出级开关的驱动级非常快，传播延迟低，输入电容最小。变压器驱动变压器输入到开关的驱动路径。变压器避免了音频频带内的谐振，在放大器开关频率下，具有低和无扩展的漏电感，具有足够的磁化电感，以保持变压器电流与总驱动级电流消耗成比例的低电平，开关频率具有较低的磁芯损耗，具有最小的电感变化，并且运行在其饱和点以下。放大器级向输出功率开关器件提供基本恒定的振幅驱动信号。

2. 发明授权

US07078963B1 Integrated PULSHI mode with shutdown 失效
标题翻译：集成PULSHI模式关机
公开(公告)号：US07078963B1
公开(公告)日：2006-07-18
申请号：US10805592
申请日：2004-03-19
申请人： Jack B. Andersen , Brian E. Attwood
发明人： Jack B. Andersen , Brian E. Attwood
IPC分类号： H03F3/38
CPC分类号： H03K7/08 , H03F3/217 , H03F3/2171 , H03F2200/331 , H03F2200/351 , H03F2200/537
摘要： Systems and methods for controlling amplification of a pair of pulse width modulated signals. In one embodiment, a system comprises an audio amplifier which is configured to receive a pulse code modulated (PCM) input signal, convert this signal to a pulse width modulated (PWM) signal in a controller, and amplify the PWM signal in an output stage. The controller separates the PWM signal into a high-side signal and a low-side signal. The controller incorporates digitally programmable delays into the processing paths for each of the high-side and low-side signals. The high-side and low-side signals are separately provided to the output stage. The separate high-side and low-side signals can be used to individually control (e.g., turn off) the high-side and low-side transistors. Circuitry is included to generate a short low-side pulse when both transistors are turned off in order to drain the gate charge from the high-side transistor.
摘要翻译：用于控制一对脉冲宽度调制信号的放大的系统和方法。在一个实施例中，系统包括音频放大器，其被配置为接收脉冲编码调制（PCM）输入信号，将该信号转换成控制器中的脉宽调制（PWM）信号，并在输出级放大PWM信号。控制器将PWM信号分离为高边信号和低边信号。控制器将数字可编程延迟器并入高侧和低侧信号中的每一个的处理路径。高侧和低侧信号分别提供给输出级。单独的高侧和低侧信号可以用于单独控制（例如，关闭）高侧和低侧晶体管。当两个晶体管截止以便从高侧晶体管漏极栅极电荷时，包括电路以产生短的低端脉冲。

3. 发明授权

US06249156B1 Electric circuit 失效
标题翻译：电路
公开(公告)号：US06249156B1
公开(公告)日：2001-06-19
申请号：US09431665
申请日：1999-11-01
申请人： Brian E. Attwood
发明人： Brian E. Attwood
IPC分类号： H03B100
CPC分类号： H02M1/38 , H02M3/156 , H02M3/1588 , Y02B70/1466
摘要： An electric circuit comprising a transformer having first and second magnetically coupled inductors, a first switch which is connected to the first inductor, a second switch which is connected to the second inductor so as to be turned on and off by the second inductor; and a timing circuit for connection to the first switch for turning the first switch on and off. The second inductor is magnetically coupled to the first inductor such that flux reversal in the first inductor which occurs as the first switch is turned off will induce flux reversal in the second inductor which will thereby turn on the second switch. The circuit includes a damping element arranged to damp the operation of the second switch.
摘要翻译：一种电路，包括具有第一和第二磁耦合电感器的变压器，连接到第一电感器的第一开关，连接到第二电感器以由第二电感器导通和断开的第二开关; 以及用于连接到第一开关以用于使第一开关接通和断开的定时电路。第二电感器磁耦合到第一电感器，使得当第一开关断开时发生的第一电感器中的磁通反转将引起第二电感器中的磁通反转，从而导通第二开关。电路包括阻尼元件，其被布置成阻尼第二开关的操作。

4. 发明授权

US5629841A Low power dc-dc converter 失效
标题翻译：低功率dc-dc转换器
公开(公告)号：US5629841A
公开(公告)日：1997-05-13
申请号：US505194
申请日：1995-10-20
申请人： Brian E. Attwood
发明人： Brian E. Attwood
IPC分类号： H02M3/335 , H02M3/24 , H02M5/42 , H02M7/44
CPC分类号： H02M3/33507
摘要： The converter is a switch mode converter in which a primary transformer winding (12) is switched by a power switch (Q5). The transformer secondary is wound with a power output winding (14) and a reference winding (29). The power switch (Q5) is operated by IC (24) connected as a ring-of-three oscillator. Regulation is achieved by two feedback means. First, the voltage on the reference winding (29) is peak rectified and fed back (30) to control the oscillator (24). Secondly, a signal which is a function of the on-time of the power switch (Q5) modifies the operation of a reference voltage source (Q1, Q2). The converter is particularly adapted to operate over a wide range of input voltages (typically 24 V-60 V) and over a wide range of low power (typically 24 mW-850 mW).
摘要翻译： PCT No.PCT / GB94 / 00296 Sec。 371 1995年10月20日第 102（e）日期1995年10月20日PCT 1994年2月14日提交PCT公布。第WO94 / 18747号公报日期1994年8月18日转换器是一个开关模式转换器，其中主变压器绕组（12）由电源开关（Q5）切换。变压器二次绕组具有功率输出绕组（14）和参考绕组（29）。电源开关（Q5）由作为三环振荡器连接的IC（24）操作。通过两个反馈手段实现监管。首先，对参考绕组（29）上的电压进行峰值整流并反馈（30）以控制振荡器（24）。其次，作为功率开关（Q5）的接通时间的函数的信号修改参考电压源（Q1，Q2）的操作。转换器特别适用于宽范围的输入电压（通常为24 V-60 V）和宽范围的低功耗（通常为24 mW-850 mW）。

5. 发明授权

US4182992A Pulse width modulated signal amplifier 失效
标题翻译：脉宽调制信号放大器
公开(公告)号：US4182992A
公开(公告)日：1980-01-08
申请号：US896243
申请日：1978-04-14
申请人： Brian E. Attwood
发明人： Brian E. Attwood
IPC分类号： H03F3/217 , H03K5/02 , H03K17/66 , H03F3/38
CPC分类号： H03K5/02 , H03F3/217 , H03K17/665
摘要： A pulse width modulated signal amplifier includes first and second switching transistors and a diode which are connected in series across a DC power source and in the forward direction with respect to the polarity of the DC power source, the diode being connected between the first and second transistors. The first transistor has its base connected to a corresponding terminal of the DC power source and the second transistor has its base supplied with a pulse width modulated signal to be amplified. A connection point of the first transistor and a diode is connected to a lowpass filter which provides a demodulated audio signal to a load. A coil is connected between the diode and the second transistor and the connection point of the coil and the second transistor is connected to the base of first transistor.
摘要翻译：脉宽调制信号放大器包括第一和第二开关晶体管和二极管，它们相对于直流电源的极性串联连接在直流电源上并且在正向上串联，二极管连接在第一和第二晶体管。第一晶体管的基极连接到直流电源的相应端子，第二晶体管的基极被提供有被放大的脉宽调制信号。第一晶体管和二极管的连接点连接到向负载提供解调的音频信号的低通滤波器。线圈连接在二极管和第二晶体管之间，线圈和第二晶体管的连接点连接到第一晶体管的基极。

6. 发明授权

US07816985B2 Switching amplifiers 有权
标题翻译：开关放大器
公开(公告)号：US07816985B2
公开(公告)日：2010-10-19
申请号：US12270692
申请日：2008-11-13
申请人： Brian E Attwood , Wilson E. Taylor , Larry E. Hand
发明人： Brian E Attwood , Wilson E. Taylor , Larry E. Hand
IPC分类号： H03F3/217
CPC分类号： H03F3/217 , H03F3/2173 , H03F2200/03 , H03F2200/271 , H03F2200/273
摘要： Systems and methods implemented in a switching amplifier for providing consistent, matching switching between top and bottom switching devices in a switching amplifier. One embodiment includes a half-bridge circuit output stage, a driver stage and a transformer. The driver stage, which drives the switches of the output stage, is very fast, has a low propagation delay, and has minimal input capacitance. The transformer drives the drive paths from the transformer inputs to the switches. The transformer avoids resonances within the audio band and at the amplifier switching frequencies, has low and spread free leakage inductance, has enough magnetizing inductance to keep transformer currents low in proportion to the total driver stage current drain, has low core losses at the switching frequency, has minimal inductance change and operates well below its saturation point. The amplifier stage provides a substantially constant amplitude drive signal to the output power switching devices.
摘要翻译：在开关放大器中实现的系统和方法，用于在开关放大器中的顶部和底部开关器件之间提供一致的匹配切换。一个实施例包括半桥电路输出级，驱动级和变压器。驱动输出级开关的驱动级非常快，传播延迟低，输入电容最小。变压器驱动变压器输入到开关的驱动路径。变压器避免了音频频带内的谐振，在放大器开关频率下，具有低和无扩展的漏电感，具有足够的磁化电感，以保持变压器电流与总驱动级电流消耗成比例的低电平，开关频率具有较低的磁芯损耗，具有最小的电感变化，并且运行在其饱和点以下。放大器级向输出功率开关器件提供基本恒定的振幅驱动信号。

7. 发明授权

US5394319A Non-coupled integrated magnetic structure 失效
标题翻译：非耦合集成磁结构
公开(公告)号：US5394319A
公开(公告)日：1995-02-28
申请号：US49621
申请日：1993-04-19
申请人： Brian E. Attwood , Michael J. Finazzo
发明人： Brian E. Attwood , Michael J. Finazzo
IPC分类号： H02M3/28
CPC分类号： H02M3/28 , H02M2001/0064
摘要： An integrated, non-coupled structure comprises a body of ferrite material with a plurality of through passages. A plurality of conductors pass through respective ones of the passages to form windings, certain of which have no magnetic field coupling and hence provide separate non-coupled magnetic functions. The magnetic structure is used as a component of a switching dc-to-dc converter, integrating the functions of isolation transformer, output filter and feedback signal coupling.
摘要翻译：集成的非耦合结构包括具有多个通路的铁氧体材料体。多个导体通过相应的通道中的一个以形成绕组，其中某些不具有磁场耦合，因此提供单独的非耦合磁性功能。磁性结构用作开关dc-dc转换器的组件，集成了隔离变压器，输出滤波器和反馈信号耦合的功能。

8. 发明授权

US4992751A Audio amplifier with phase modulated pulse width modulation 失效
标题翻译：具有相位调制脉冲宽度调制的音频放大器
公开(公告)号：US4992751A
公开(公告)日：1991-02-12
申请号：US422518
申请日：1989-10-17
申请人： Brian E. Attwood , Larry E. Hand , Lee C. Santillano
发明人： Brian E. Attwood , Larry E. Hand , Lee C. Santillano
IPC分类号： H03F3/217
CPC分类号： H03F3/38 , H03F3/2171
摘要： In a digitally controlled amplifier circuit a dc power source is modulated by an oscillator signal for producing a reference square wave signal. A sawtooth signal, double the frequency of the reference signal and synchronized therewith, is compared with a variable input signal to be amplified. When the sawtooth exceeds the input signal a phase shifted version of the reference signal, shifted in phase in accord with the instantaneous amplitude of the variable signal is produced. A switching circuit logically governed by the reference and phase shifted signals produce a pulse width modulated output signal of a selected polarity. An output filter smooths the pulse width modulated output signal and steering diodes control the polarity of the switching circuit.
摘要翻译：在数字控制放大器电路中，直流电源由振荡器信号调制以产生参考方波信号。将参考信号的频率加倍并与其同步的锯齿波信号与要放大的可变输入信号进行比较。当锯齿波超过输入信号时，产生参考信号的相移版本，根据可变信号的瞬时幅度移位同相。由参考和相移信号逻辑地控制的开关电路产生所选极性的脉宽调制输出信号。输出滤波器平滑脉宽调制输出信号，转向二极管控制开关电路的极性。

9. 发明授权

US4692851A Harmonic-resonant power supply 失效
标题翻译：谐波谐振电源
公开(公告)号：US4692851A
公开(公告)日：1987-09-08
申请号：US708011
申请日：1985-03-04
申请人： Brian E. Attwood
发明人： Brian E. Attwood
IPC分类号： H02M3/337
CPC分类号： H02M3/3376 , Y02B70/1433
摘要： A switching inverter power supply has a harmonic semi-resonant circuit associated with an isolation transformer for reducing electromagnetic interference. Fixed-frequency operation with pulse width modulation for regulation is accompanied by controlled current rise and fall times in the transformer primary. The semi-resonant circuit comprises an inductor in series with the transformer primary and a capacitor in parallel with the transformer secondary, transformer leakage inductance being included in the resonance. In one version, the resonant frequency can be set from about the fifth to about the twentieth harmonic of the fixed switching frequency for reducing peak switching currents.
摘要翻译：开关逆变器电源具有与用于减小电磁干扰的隔离变压器相关联的谐波半谐振电路。带调制脉宽调制的固定频率工作伴随变压器初级电流的受控电流上升和下降时间。半谐振电路包括与变压器初级串联的电感器和与变压器次级并联的电容器，变压器漏电感包括在谐振中。在一个版本中，谐振频率可以设置为用于降低峰值开关电流的固定开关频率的约五分之一到约二十谐波。

10. 发明授权

US4178556A Class D amplifier system 失效
标题翻译： D类放大器系统
公开(公告)号：US4178556A
公开(公告)日：1979-12-11
申请号：US897699
申请日：1978-04-19
申请人： Brian E. Attwood
发明人： Brian E. Attwood
IPC分类号： H03F1/32 , H03F3/20 , H03F3/217 , H03F3/38
CPC分类号： H03F3/217
摘要： In a Class D amplifier system comprising a pulse width modulator for pulse width modulating with an audio signal a carrier signal having a frequency higher than that of the audio signal, an output switching amplifier connected to the modulator, and a lowpass filter connected to the output amplifier to supply a demodulated audio signal to a load in which a trap circuit resonant at a carrier signal frequency is provided in the lowpass filter to permit part of an output signal from the trap circuit which is free from a carrier signal component to be negative-fed back to the pulse width modulator.
摘要翻译：在D类放大器系统中，包括用音频信号脉冲宽度调制的脉冲宽度调制器，具有高于音频信号频率的载波信号，连接到调制器的输出开关放大器和连接到输出端的低通滤波器放大器，用于向低通滤波器中提供以载波信号频率谐振的陷波电路的负载提供解调的音频信号，以允许来自不存在载波信号分量的陷波电路的输出信号的一部分为负 - 反馈到脉宽调制器。

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