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1. 发明申请

WO2006056952A3 CURRENT LIMITING CIRCUIT FOR RF POWER AMPLIFIER 审中-公开
标题翻译：射频功率放大器的电流限制电路
公开(公告)号：WO2006056952A3
公开(公告)日：2007-04-26
申请号：PCT/IB2005053884
申请日：2005-11-23
申请人： KONINKL PHILIPS ELECTRONICS NV , HUG JOHN J , PRIKHODKO DMITRI P , VAN BEZOOIJEN ADRIANUS
发明人： HUG JOHN J , PRIKHODKO DMITRI P , VAN BEZOOIJEN ADRIANUS
IPC分类号： H03F1/52
CPC分类号： H03F1/52 , H03F2200/456 , H03F2200/462 , H03F2200/474 , H03F2200/477
摘要： A current limiting circuit, especially for an RF power amplifier (PA) having a power control loop. The circuit is adapted to sense a representation of a bias current fed to a final stage of the PA. The sensed representation of the bias current is compared to a predetermined reference current and a signal is fed back to the power control loop upon the sensed representation of the bias current exceeding the reference current so as to limit output current of the PA. This provides a limitation of a current drawn by the PA which is generally insensitive to supply voltage and temperature variations. Optionally, a second circuit may be added to limit current drawn by the PA. The second circuit comprising a high accuracy VI converter that is adapted to compare a voltage VLIM representing a feed-back voltage of the power control loop and a predetermined reference voltage VBGAP. The circuit is operatively connected to the VI converter so as to reduce the output current lout upon the voltage VLIM representing the feed-back voltage exceeding the predetermined reference voltage VBGAP. Under antenna mismatch conditions both circuits help to limit a supply current drawn by the PA compared to prior art power control loops that are unable to detect and limit a high current draw under mismatch conditions.
摘要翻译：一种限流电路，特别是具有功率控制回路的RF功率放大器（PA）。电路适于感测馈送到PA的最终级的偏置电流的表示。将感测到的偏置电流的表示与预定的参考电流进行比较，并且在检测到的超过参考电流的偏置电流的表示之后将信号反馈到功率控制环路，以便限制PA的输出电流。这提供了对PA的电流的限制，其通常对电源电压和温度变化不敏感。可选地，可以添加第二电路以限制由PA吸取的电流。第二电路包括高精度VI转换器，其适于将表示功率控制回路的反馈电压的电压VLIM与预定参考电压VBGAP进行比较。该电路可操作地连接到VI转换器，以便减少表示超过预定参考电压VBGAP的反馈电压的电压VLIM上的输出电流。在天线不匹配条件下，与现有技术的功率控制回路相比，两个电路有助于限制由PA引起的电源电流，这些功率控制回路在不匹配条件下无法检测和限制高电流消耗。

2. 发明申请

WO2006072840A1 CURRENT LIMITING AMPLIFIER 审中-公开
标题翻译：电流限制放大器
公开(公告)号：WO2006072840A1
公开(公告)日：2006-07-13
申请号：PCT/IB2005/053891
申请日：2005-11-24
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HUG, John, J. , PRIKHODKO, Dmitri, P. , VAN BEZOOIJEN, Adrianus
发明人： HUG, John, J. , PRIKHODKO, Dmitri, P. , VAN BEZOOIJEN, Adrianus
IPC分类号： H03F1/52
CPC分类号： H03F1/52 , H03F1/523 , H03F3/45183
摘要： A current limiting circuit, especially for an RF power amplifier (PA) having a power control loop. The current limiting circuit comprises a high accuracy VI converter that is adapted to compare a voltage VLIM representing a feed-back voltage of the power control loop and a predetermined reference voltage VBGAP. The circuit is operatively connected to the VI converter so as to reduce the output current lout upon the voltage VLIM representing the feed-back voltage exceeding the predetermined reference voltage VBGAP. This provides a limitation of a current drawn by the PA which is generally insensitive to supply voltage and temperature variations. Optionally, a second circuit may be added to limit current drawn by the PA. The second circuit being adapted to sense a bias current fed to a final stage of the PA and feed back to the power control loop upon the sensed bias current exceeding a certain threshold. Under antenna mismatch conditions both circuits helps to limit a supply current drawn by the PA compared to prior art power control loops that are unable to detect and limit a high current draw under mismatch conditions.
摘要翻译：一种限流电路，特别是具有功率控制回路的RF功率放大器（PA）。限流电路包括高精度VI转换器，其适于将表示功率控制回路的反馈电压的电压VLIM与预定参考电压VBGAP进行比较。该电路可操作地连接到VI转换器，以便减少表示超过预定参考电压VBGAP的反馈电压的电压VLIM上的输出电流。这提供了对PA的电流的限制，其通常对电源电压和温度变化不敏感。可选地，可以添加第二电路以限制由PA吸取的电流。第二电路适于感测馈送到PA的最后级的偏置电流，并且在检测到的偏置电流超过某个阈值时反馈到功率控制环路。在天线不匹配条件下，与现有技术的功率控制回路相比，两个电路有助于限制由PA引起的电源电流，这些功率控制回路在不匹配条件下无法检测和限制高电流消耗。

3. 发明申请

WO2006056952A2 CURRENT LIMITING CIRCUIT FOR RF POWER AMPLIFIER 审中-公开
标题翻译：射频功率放大器的电流限制电路
公开(公告)号：WO2006056952A2
公开(公告)日：2006-06-01
申请号：PCT/IB2005/053884
申请日：2005-11-23
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , HUG, John, J. , PRIKHODKO, Dmitri, P. , VAN BEZOOIJEN, Adrianus
发明人： HUG, John, J. , PRIKHODKO, Dmitri, P. , VAN BEZOOIJEN, Adrianus
CPC分类号： H03F1/52 , H03F2200/456 , H03F2200/462 , H03F2200/474 , H03F2200/477
摘要： A current limiting circuit, especially for an RF power amplifier (PA) having a power control loop. The circuit is adapted to sense a representation of a bias current fed to a final stage of the PA. The sensed representation of the bias current is compared to a predetermined reference current and a signal is fed back to the power control loop upon the sensed representation of the bias current exceeding the reference current so as to limit output current of the PA. This provides a limitation of a current drawn by the PA which is generally insensitive to supply voltage and temperature variations. Optionally, a second circuit may be added to limit current drawn by the PA. The second circuit comprising a high accuracy VI converter that is adapted to compare a voltage VLIM representing a feed-back voltage of the power control loop and a predetermined reference voltage VBGAP. The circuit is operatively connected to the VI converter so as to reduce the output current lout upon the voltage VLIM representing the feed-back voltage exceeding the predetermined reference voltage VBGAP. Under antenna mismatch conditions both circuits help to limit a supply current drawn by the PA compared to prior art power control loops that are unable to detect and limit a high current draw under mismatch conditions.
摘要翻译：一种限流电路，特别是具有功率控制回路的RF功率放大器（PA）。电路适于感测馈送到PA的最终级的偏置电流的表示。将感测到的偏置电流的表示与预定的参考电流进行比较，并且在检测到的超过参考电流的偏置电流的表示之后将信号反馈到功率控制环路，以便限制PA的输出电流。这提供了对PA的电流的限制，其通常对电源电压和温度变化不敏感。可选地，可以添加第二电路以限制由PA吸取的电流。第二电路包括高精度VI转换器，其适于将表示功率控制回路的反馈电压的电压VLIM与预定参考电压VBGAP进行比较。该电路可操作地连接到VI转换器，以便减少表示超过预定参考电压VBGAP的反馈电压的电压VLIM上的输出电流。在天线不匹配条件下，与现有技术的功率控制回路相比，两个电路有助于限制由PA引起的电源电流，这些功率控制回路在不匹配条件下无法检测和限制高电流消耗。

4. 发明申请

WO2006038189A1 DUAL BIAS CONTROL CIRCUIT 审中-公开
标题翻译：双偏置控制电路
公开(公告)号：WO2006038189A1
公开(公告)日：2006-04-13
申请号：PCT/IB2005/053269
申请日：2005-10-05
申请人： KONINKLIJKE PHILIPS ELECTRONICS N.V. , PRIKHODKO, Dmitri, P. , OOIJMAN, Remco , LOK, Pieter , SLUIJTER, Jeroen
发明人： PRIKHODKO, Dmitri, P. , OOIJMAN, Remco , LOK, Pieter , SLUIJTER, Jeroen
IPC分类号： H03F1/02
CPC分类号： H03F1/30 , H03F1/0205 , H03F1/0211 , H03F1/0261 , H03F2200/18 , H03F2200/504 , H03F2200/75
摘要： The present invention relates to a bias control circuit and method for supplying a bias signal to at least one stage of an amplifier circuit, wherein a dual bias control is provided by generating a bias current and additionally using this bias current to derive a control signal for limiting a supply voltage of the at least one amplifier stage in response to the control signal. Thereby, a compression of the output signal of the amplifier stage, which results from the voltage limitation, can be realized in addition to the base current steering. This leads to a decrease in small signal gain and thus reduced output noise.
摘要翻译：本发明涉及一种用于向放大器电路的至少一级提供偏置信号的偏置控制电路和方法，其中通过产生偏置电流来提供双偏压控制，并且另外使用该偏置电流来导出用于响应于控制信号限制至少一个放大器级的电源电压。因此，除了基极电流转向之外，还可以实现由电压限制引起的放大器级的输出信号的压缩。这导致小信号增益的降低，从而降低输出噪声。

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