公开(公告)号：US09775251B2

公开(公告)日：2017-09-26

申请号：US14957752

申请日：2015-12-03

Applicant: STMICROELECTRONICS INTERNATIONAL N.V.

Inventor： Patrik Arno ,  Eric Cirot

IPC: H05K3/32 ,  H03K17/16 ,  H02M1/08 ,  H02M3/158 ,  H02M7/483 ,  H02M1/00

CPC classification number: H05K3/32 ,  H02M1/08 ,  H02M3/1588 ,  H02M7/483 ,  H02M2001/0054 ,  H02M2007/4835 ,  H03K17/162 ,  Y02B70/1466 ,  Y02B70/1491

Abstract: A circuit is for controlling a power transistor of a DC/DC converter. The circuit may include first and second first transistors coupled in series between a first reference voltage and a control terminal of the power transistor, the first and second transistors defining a first junction node. The circuit may include third and fourth transistors coupled in series between the control terminal and a second reference voltage, the third and fourth transistors defining a second junction node. The first and second transistors may have a first conductivity type different from a second conductivity type of the third and fourth transistors. The circuit may include a capacitive element coupled between the first and second junction nodes.

公开(公告)号：US09634698B2

公开(公告)日：2017-04-25

申请号：US14949453

申请日：2015-11-23

Applicant: STMicroelectronics International N.V.

Inventor： Patrik Arno

IPC: H04B1/04 ,  H03F1/02 ,  H03F1/32 ,  H03F3/19 ,  H03F3/24

CPC classification number: H04B1/0475 ,  H03F1/0238 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/504 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: The output of a Radio Frequency (RF) Power Amplifier (PA) is sampled and down-converted, and the amplitude envelope of the baseband feedback signal is extracted. This is compared to the envelope of a transmission signal, and the envelope tracking modulation of the RF PA supply voltage is adaptively pre-distorted to achieve a constant ISO-Gain (and phase) in the RF PA. In particular, a nonlinear function is interpolated from a finite number gain values calculated from the feedback and transmission signals. This nonlinear function is then used to pre-distort the transmission signal envelope, resulting in a constant gain at the RF PA over a wide range of supply voltage values. Since the gains are calculated from a feedback signal, the pre-distortion may be recalculated at event triggers, such as an RF frequency change.

公开(公告)号：US20160080013A1

公开(公告)日：2016-03-17

申请号：US14949453

申请日：2015-11-23

Applicant: STMicroelectronics International N.V.

Inventor： Patrik Arno

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/0238 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/504 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: The output of a Radio Frequency (RF) Power Amplifier (PA) is sampled and down-converted, and the amplitude envelope of the baseband feedback signal is extracted. This is compared to the envelope of a transmission signal, and the envelope tracking modulation of the RF PA supply voltage is adaptively pre-distorted to achieve a constant ISO-Gain (and phase) in the RF PA. In particular, a nonlinear function is interpolated from a finite number gain values calculated from the feedback and transmission signals. This nonlinear function is then used to pre-distort the transmission signal envelope, resulting in a constant gain at the RF PA over a wide range of supply voltage values. Since the gains are calculated from a feedback signal, the pre-distortion may be recalculated at event triggers, such as an RF frequency change.

Abstract translation: 对射频（RF）功率放大器（PA）的输出进行采样和下变频，并提取基带反馈信号的幅度包络。 将其与传输信号的包络进行比较，并且RF PA电源电压的包络跟踪调制被自适应地预失真以在RF PA中实现恒定的ISO增益（和相位）。 特别地，从反馈和传输信号计算的有限数量的增益值内插非线性函数。 然后使用该非线性函数对发射信号包络进行预失真，从而在宽范围的电源电压值下在RF PA上产生恒定的增益。 由于根据反馈信号计算增益，所以可以在诸如RF频率变化的事件触发时重新计算预失真。

公开(公告)号：US09231627B2

公开(公告)日：2016-01-05

申请号：US14072898

申请日：2013-11-06

Applicant: STMicroelectronics International N.V.

Inventor： Patrik Arno

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/0238 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/504 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: The output of a Radio Frequency (RF) Power Amplifier (PA) is sampled and down-converted, and the amplitude envelope of the baseband feedback signal is extracted. This is compared to the envelope of a transmission signal, and the envelope tracking modulation of the RF PA supply voltage VCC is adaptively pre-distorted to achieve a constant ISO-Gain (and phase) in the RF PA. In particular, a nonlinear function is interpolated from a finite number gain values calculated from the feedback and transmission signals. This nonlinear function is then used to pre-distort the transmission signal envelope, resulting in a constant gain at the RF PA over a wide range of supply voltage VCC values. Since the gains are calculated from a feedback signal, the pre-distortion may be recalculated at event triggers, such as an RF frequency change. Furthermore, the method improves nonlinearity in the entire transmitter chain, not just the RF PA.

Abstract translation: 对射频（RF）功率放大器（PA）的输出进行采样和下变频，并提取基带反馈信号的幅度包络。 将其与传输信号的包络进行比较，并且RF PA电源电压VCC的包络跟踪调制被自适应地预失真以在RF PA中实现恒定的ISO增益（和相位）。 特别地，从反馈和传输信号计算的有限数量的增益值内插非线性函数。 然后使用这种非线性函数对传输信号包络进行预失真，从而在宽范围的电源电压VCC值下在RF PA上产生恒定的增益。 由于根据反馈信号计算增益，所以可以在诸如RF频率变化的事件触发时重新计算预失真。 此外，该方法改善了整个发射机链中的非线性，而不仅仅是RF PA。

公开(公告)号：US20150126141A1

公开(公告)日：2015-05-07

申请号：US14072898

申请日：2013-11-06

Applicant: STMicroelectronics International N.V.

Inventor： Patrik Arno

IPC: H04B1/04

CPC classification number: H04B1/0475 ,  H03F1/0238 ,  H03F1/3241 ,  H03F1/3247 ,  H03F1/3258 ,  H03F3/19 ,  H03F3/24 ,  H03F2200/102 ,  H03F2200/336 ,  H03F2200/504 ,  H03F2201/3212 ,  H03F2201/3233 ,  H04B2001/0425

Abstract: The output of a Radio Frequency (RF) Power Amplifier (PA) is sampled and down-converted, and the amplitude envelope of the baseband feedback signal is extracted. This is compared to the envelope of a transmission signal, and the envelope tracking modulation of the RF PA supply voltage VCC is adaptively pre-distorted to achieve a constant ISO-Gain (and phase) in the RF PA. In particular, a nonlinear function is interpolated from a finite number gain values calculated from the feedback and transmission signals. This nonlinear function is then used to pre-distort the transmission signal envelope, resulting in a constant gain at the RF PA over a wide range of supply voltage VCC values. Since the gains are calculated from a feedback signal, the pre-distortion may be recalculated at event triggers, such as an RF frequency change. Furthermore, the method improves nonlinearity in the entire transmitter chain, not just the RF PA.

Abstract translation: 对射频（RF）功率放大器（PA）的输出进行采样和下变频，并提取基带反馈信号的幅度包络。 将其与传输信号的包络进行比较，并且RF PA电源电压VCC的包络跟踪调制被自适应地预失真以在RF PA中实现恒定的ISO增益（和相位）。 特别地，从反馈和传输信号计算的有限数量的增益值内插非线性函数。 然后使用这种非线性函数对传输信号包络进行预失真，从而在宽范围的电源电压VCC值下在RF PA上产生恒定的增益。 由于根据反馈信号计算增益，所以可以在诸如RF频率变化的事件触发时重新计算预失真。 此外，该方法改善了整个发射机链中的非线性，而不仅仅是RF PA。