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1. 发明申请

WO2009065068A3 SWITCHING AMPLIFIERS 审中-公开
标题翻译：开关放大器
公开(公告)号：WO2009065068A3
公开(公告)日：2009-08-20
申请号：PCT/US2008083677
申请日：2008-11-14
申请人： INTERSIL INC , ATTWOOD BRIAN E , TAYLOR WILSON E , HAND LARRY E
发明人： ATTWOOD BRIAN E , TAYLOR WILSON E , HAND LARRY E
IPC分类号： H03F3/217 , H03F1/32
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，在开关频率下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. 发明专利

GB9214896D0 A LOW COST 1MHZ FERRITE REGULATED CONVERTER 未知
公开(公告)号：GB9214896D0
公开(公告)日：1992-08-26
申请号：GB9214896
申请日：1992-07-14
申请人： ATTWOOD BRIAN E
IPC分类号： G05F1/38 , H02M3/28

3. 发明申请

WO2009065068A2 SWITCHING AMPLIFIERS 审中-公开
标题翻译：开关放大器
公开(公告)号：WO2009065068A2
公开(公告)日：2009-05-22
申请号：PCT/US2008/083677
申请日：2008-11-14
申请人： INTERSIL AMERICAS INC. , ATTWOOD, Brian E. , TAYLOR, Wilson E. , HAND, Larry E.
发明人： ATTWOOD, Brian E. , TAYLOR, Wilson E. , HAND, Larry E.
IPC分类号： H03F3/217 , H03F1/32
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：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，驱动器级和变压器。驱动输出级开关的驱动器级非常快，具有低传播延迟，并具有最小的输入电容。变压器驱动从变压器输入到开关的驱动路径。该变压器避免了音频带内和放大器开关频率处的谐振，具有低且分散的自由漏电感，具有足够的磁化电感以保持变压器电流与总驱动器级电流消耗成比例的低，在开关频率处具有低核心损耗，具有最小的电感变化，并且工作在远低于其饱和点。放大器级向输出功率开关器件提供基本恒定幅度的驱动信号。

4. 发明专利

GB9302942D0 LOW COST,LOW CURRENT POWER SUPPLY 未知
公开(公告)号：GB9302942D0
公开(公告)日：1993-03-31
申请号：GB9302942
申请日：1993-02-13
申请人： ATTWOOD BRIAN E
IPC分类号： H02M3/335
摘要： PCT No. PCT/GB94/00296 Sec. 371 Date Oct. 20, 1995 Sec. 102(e) Date Oct. 20, 1995 PCT Filed Feb. 14, 1994 PCT Pub. No. WO94/18747 PCT Pub. Date Aug. 18, 1994The 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).

5. 发明专利

GB8929247D0 TRANSFORMER 未知
公开(公告)号：GB8929247D0
公开(公告)日：1990-02-28
申请号：GB8929247
申请日：1989-12-28
申请人： ATTWOOD BRIAN E

6. 发明专利

GB8905002D0 AUDIO AMPLIFIERS 未知
公开(公告)号：GB8905002D0
公开(公告)日：1989-04-19
申请号：GB8905002
申请日：1989-03-04
申请人： ATTWOOD BRIAN E
IPC分类号： H03F3/38 , H03F3/217 , H03F3/68 , H03K7/08 , H03K17/00
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.

7. 发明专利

GB9608343D0 New transformer using innovative winding methods 未知
公开(公告)号：GB9608343D0
公开(公告)日：1996-06-26
申请号：GB9608343
申请日：1996-04-23
申请人： ATTWOOD BRIAN E

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