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1. 发明申请

WO2005050829A2 OVERCURRENT PROTECTION IN AMPLIFIER TOPOLOGIES EMPLOYING DC ISOLATION 审中-公开
标题翻译：使用直流隔离的放大器拓扑中的过流保护
公开(公告)号：WO2005050829A2
公开(公告)日：2005-06-02
申请号：PCT/US2004/038359
申请日：2004-11-16
申请人： TRIPATH TECHNOLOGY, INC. , MAZDA, Babak
发明人： MAZDA, Babak
IPC分类号： H03F
CPC分类号： H03F1/523 , H03F3/2171 , H03F2200/441 , H03F2200/444 , H03F2200/462
摘要： An amplifier having output switch circuitry is described. A sense resistor is operable to transmit an output current associated with the output switch circuitry. Low-voltage circuitry is operable to provide a drive signal to the output switch circuitry. Isolation circuitry is operable to provide DC isolation between the low-voltage circuitry and the output switch circuitry. Current sensing circuitry is directly connected to the sense resistor and is operable to sense the output current in the sense resistor and generate a fault signal in response to an overcurrent condition. The fault signal is characterized by a signal level which is compatible with the low-voltage circuitry without additional DC isolation.
摘要翻译：描述了具有输出开关电路的放大器。感测电阻器可操作地传输与输出开关电路相关联的输出电流。低压电路可操作以向输出开关电路提供驱动信号。隔离电路可操作以在低压电路和输出开关电路之间提供直流隔离。电流感测电路直接连接到感测电阻器，并且可操作以感测感测电阻器中的输出电流并且响应于过电流状态而产生故障信号。故障信号的特征在于与没有额外的直流隔离的低压电路兼容的信号电平。

2. 发明申请

WO2005050828A2 INDUCTOR-BASED CURRENT SENSING 审中-公开
标题翻译：基于电感的电流传感
公开(公告)号：WO2005050828A2
公开(公告)日：2005-06-02
申请号：PCT/US2004/038358
申请日：2004-11-16
申请人： TRIPATH TECHNOLOGY, INC. , MAZDA, Babak
发明人： MAZDA, Babak
IPC分类号： H03F
CPC分类号： G01R19/0092 , G01R15/18 , G01R19/2513
摘要： A circuit for sensing a current in an inductor is described. Integrator circuitry is operable to generate a first signal representing an integration of a voltage across the inductor. Comparison circuitry is operable to generate a reset signal each time the first signal reaches either a positive or negative threshold. The reset signal is for resetting the integrator circuitry. Logic circuitry is operable to generate a count direction signal indicating which of the positive and negative thresholds was reached to generate the reset signal. Counter circuitry is operable to increment or decrement a count representing the current in the inductor in response to the reset and count direction signals.
摘要翻译：描述用于感测电感器中的电流的电路。积分器电路可操作以产生表示电感器两端的电压积分的第一信号。比较电路可操作以在每次第一信号达到正阈值或负阈值时产生复位信号。复位信号用于复位积分器电路。逻辑电路可操作以产生指示正阈值和负阈值达到哪一个以产生复位信号的计数方向信号。计数器电路可操作以响应于复位和计数方向信号递增或递减表示电感器中的电流的计数。

3. 发明申请

WO2006124491A3 NOISE-SHAPING AMPLIFIER WITH WAVEFORM LOCK 审中-公开
公开(公告)号：WO2006124491A3
公开(公告)日：2006-11-23
申请号：PCT/US2006/018192
申请日：2006-05-11
申请人： TRIPATH TECHNOLOGY, INC. , MAZDA, Babak , SAHANDIESFANJANI, Farzad , TRIPATHI, Adya
发明人： MAZDA, Babak , SAHANDIESFANJANI, Farzad , TRIPATHI, Adya
IPC分类号： H03L7/00
摘要： A generalized amplifier architecture is described which employs noise-shaping feedback (208), and for which the output waveform (output of 206) closely resembles the input waveform (input of 202).

4. 发明申请

WO2007136800A2 DC OFFSET MITIGATION IN A SINGLE-SUPPLY AMPLIFIER 审中-公开
标题翻译：直流偏压放大器在单电源放大器
公开(公告)号：WO2007136800A2
公开(公告)日：2007-11-29
申请号：PCT/US2007/012011
申请日：2007-05-17
申请人： CIRRAS LOGIC, INC. , MAZDA, Babak , SHINKRE, Rahul , SAHANDIESFANJANI, Farzad , SAYYEDI, Maziar , PARASAD, Krishna
发明人： MAZDA, Babak , SHINKRE, Rahul , SAHANDIESFANJANI, Farzad , SAYYEDI, Maziar , PARASAD, Krishna
IPC分类号： C12P21/06
CPC分类号： H03F3/45623 , H03F3/2173
摘要： An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge configuration configured to be coupled between a supply voltage and ground. An output of the bridge configuration is configured to be coupled to a load. The first loop is characterized by a first gain. A decoupling capacitor is configured to be coupled to the load. A second loop which includes the first amplifier stage is configured to charge the decoupling capacitor to a first voltage generated with reference to the offset voltage before operation of the switching devices is enabled. The second loop is characterized by a second gain. The first and second gains are substantially the same such that when operation of the switching devices is enabled a second voltage at the output of the half-bridge configuration is substantially the same as the first voltage.
摘要翻译：描述了一种放大器，其包括第一环路，其包括具有与其相关联的偏移电压的第一放大器级。输出级包括配置为耦合在电源电压和地之间的桥接配置中的两个开关器件。桥接配置的输出被配置为耦合到负载。第一个循环的特征在于第一个增益。去耦电容器被配置为耦合到负载。包括第一放大器级的第二回路被配置为在去激活开关器件的操作之前将去耦电容器充电至相对于偏移电压产生的第一电压。第二个循环的特征在于第二个增益。第一和第二增益基本相同，使得当开关器件的操作被使能时，半桥配置的输出处的第二电压基本上与第一电压相同。

5. 发明申请

WO2004019483A3 PROVIDING DC ISOLATION IN SWITCHING AMPLIFIERS 审中-公开
公开(公告)号：WO2004019483A3
公开(公告)日：2004-03-04
申请号：PCT/US2003/025153
申请日：2003-08-12
申请人： TRIPATH TECHNOLOGY, INC.
发明人： MAZDA, Babak
IPC分类号： H03F3/217
摘要： A switching circuit is described which includes an output switch having a drive terminal and a power supply terminal. Driver circuitry provides a drive signal to the output switch. Isolation circuitry provides DC isolation between the driver circuitry and the output switch. Transient control circuitry controls the drive terminal, thereby keeping the output switch off during stabilization of a supply voltage at the power supply terminal.

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