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公开(公告)号：EP4358401A2
公开(公告)日：2024-04-24
申请号：EP24161505.3
申请日：2018-01-25
申请人： Analog Devices, Inc.
发明人： DAY, Christopher
IPC分类号： H03F1/32
CPC分类号： H03F1/0266 , H03F2203/4539220130101 , H03F2203/4545420130101 , H03F1/3211 , H03F3/19 , H03F2200/10220130101 , H03F2203/4511220130101 , H03F2203/4524420130101 , H03F2200/12920130101 , H03F2200/14420130101 , H03F2200/2120130101 , H03F2200/28520130101 , H03F2200/9920130101 , H03F3/45089 , H03F1/0222 , H03F1/22 , H03F3/21
摘要： A power amplifier circuit for broadband data communication over a path in a communication network can reduce or avoid gain compression, provide low distortion amplification performance, and can accommodate a wider input signal amplitude range. A dynamic variable bias current circuit can be coupled to a common emitter bias node of a differential pair of transistors to provide a dynamic variable bias current thereto as a function of an input signal amplitude of an input signal. Bias current is increased when input signal amplitude exceeds a threshold voltage established by an offset or level-shifting circuit. The frequency response of the bias current circuit can track the frequency content of the input signal. A delay in the signal path to the differential pair can phase-align the bias current to the amplification by the differential pair. A dynamic variable supply voltage can be based on an envelope of the input signal.
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公开(公告)号：EP3574582B1
公开(公告)日：2024-09-18
申请号：EP18744503.6
申请日：2018-01-25
CPC分类号： H03F1/0266 , H03F2203/4539220130101 , H03F2203/4545420130101 , H03F1/3211 , H03F3/19 , H03F2200/10220130101 , H03F2203/4511220130101 , H03F2203/4524420130101 , H03F2200/12920130101 , H03F2200/14420130101 , H03F2200/2120130101 , H03F2200/28520130101 , H03F2200/9920130101 , H03F3/45089 , H03F1/0222 , H03F1/22 , H03F3/21
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公开(公告)号：EP4358401A3
公开(公告)日：2024-07-10
申请号：EP24161505.3
申请日：2018-01-25
申请人： Analog Devices, Inc.
发明人： DAY, Christopher
CPC分类号： H03F1/0266 , H03F2203/4539220130101 , H03F2203/4545420130101 , H03F1/3211 , H03F3/19 , H03F2200/10220130101 , H03F2203/4511220130101 , H03F2203/4524420130101 , H03F2200/12920130101 , H03F2200/14420130101 , H03F2200/2120130101 , H03F2200/28520130101 , H03F2200/9920130101 , H03F3/45089 , H03F1/0222 , H03F1/22 , H03F3/21
摘要： A power amplifier circuit for broadband data communication over a path in a communication network can reduce or avoid gain compression, provide low distortion amplification performance, and can accommodate a wider input signal amplitude range. A dynamic variable bias current circuit can be coupled to a common emitter bias node of a differential pair of transistors to provide a dynamic variable bias current thereto as a function of an input signal amplitude of an input signal. Bias current is increased when input signal amplitude exceeds a threshold voltage established by an offset or level-shifting circuit. The frequency response of the bias current circuit can track the frequency content of the input signal. A delay in the signal path to the differential pair can phase-align the bias current to the amplification by the differential pair. A dynamic variable supply voltage can be based on an envelope of the input signal.
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