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公开(公告)号：US20170149389A1
公开(公告)日：2017-05-25
申请号：US14950295
申请日：2015-11-24
Applicant: QUALCOMM Incorporated
Inventor： Niranjan Talwalkar
CPC classification number: H03F1/0205 , H03F1/0266 , H03F1/565 , H03F3/193 , H03F3/21 , H03F3/245 , H03F3/45179 , H03F3/45475 , H03F2200/06 , H03F2200/09 , H03F2200/102 , H03F2200/15 , H03F2200/165 , H03F2200/181 , H03F2200/216 , H03F2200/222 , H03F2200/225 , H03F2200/228 , H03F2200/241 , H03F2200/42 , H03F2200/451 , H03F2200/471 , H03F2200/61 , H03F2200/91 , H03F2200/99
Abstract: A current-mode power amplifier is disclosed. In some embodiments, the power amplifier may include a first cascode transistor pair including a first transfer function coupled to a second cascode transistor pair including a second transfer function. The first transfer function may be an inverse of the second transfer function. The current-mode power amplifier may also include an inductive-capacitive (LC) resonant circuit to reduce the effects of gate capacitances of the first cascode transistor pair and the second cascode transistor pair. In some embodiments, the current-mode power amplifier may include a bias current controller. The bias current controller may adjust transistor bias currents based, at least in part, on an input signal received by the current-mode power amplifier.
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公开(公告)号：US09813085B1
公开(公告)日：2017-11-07
申请号：US15275317
申请日：2016-09-23
Applicant: QUALCOMM Incorporated
Inventor： Paul Brandon Butler , James Gardner , Niranjan Talwalkar , Burcin Baytekin
IPC: H04B1/04 , H04B7/0413 , H04B17/13 , H04B7/06 , H04L5/22
CPC classification number: H04B1/0458 , H03F1/3247 , H03F3/189 , H03F3/24 , H03F2200/451 , H03F2201/3233 , H04B1/0475 , H04B7/0413 , H04B7/0626 , H04B17/13 , H04L5/22 , H04L27/368
Abstract: A system and method for calibrating digital pre-distortion in a wireless device. A pre-distortion circuit may output a first training signal while a power amplifier of the wireless device is on, to generate a first feedback signal. The first feedback signal may be fed back to the pre-distortion circuit via a receive path of the wireless device. The pre-distortion circuit may output a second training signal while the power amplifier is off, to generate a second feedback signal. The second feedback signal may be fed back to the pre-distortion circuit via the receive path. The pre-distortion circuit may then determine one or more pre-distortion coefficients based on the first and second feedback signals.
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公开(公告)号：US09712115B2
公开(公告)日：2017-07-18
申请号：US14950295
申请日：2015-11-24
Applicant: QUALCOMM Incorporated
Inventor： Niranjan Talwalkar
CPC classification number: H03F1/0205 , H03F1/0266 , H03F1/565 , H03F3/193 , H03F3/21 , H03F3/245 , H03F3/45179 , H03F3/45475 , H03F2200/06 , H03F2200/09 , H03F2200/102 , H03F2200/15 , H03F2200/165 , H03F2200/181 , H03F2200/216 , H03F2200/222 , H03F2200/225 , H03F2200/228 , H03F2200/241 , H03F2200/42 , H03F2200/451 , H03F2200/471 , H03F2200/61 , H03F2200/91 , H03F2200/99
Abstract: A current-mode power amplifier is disclosed. In some embodiments, the power amplifier may include a first cascode transistor pair including a first transfer function coupled to a second cascode transistor pair including a second transfer function. The first transfer function may be an inverse of the second transfer function. The current-mode power amplifier may also include an inductive-capacitive (LC) resonant circuit to reduce the effects of gate capacitances of the first cascode transistor pair and the second cascode transistor pair. In some embodiments, the current-mode power amplifier may include a bias current controller. The bias current controller may adjust transistor bias currents based, at least in part, on an input signal received by the current-mode power amplifier.
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