公开(公告)号：US10694289B2

公开(公告)日：2020-06-23

申请号：US15584532

申请日：2017-05-02

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rahmi Hezar ,  Rajan Narasimha ,  Srinath Ramaswamy

IPC: H04R3/04 ,  H03F3/217 ,  H03F1/32 ,  H03F3/187

Abstract: One example includes a system that is comprised of a speaker, an amplifier, a current sensor, and a compensator circuit. The speaker produces audio in response to an amplified analog input signal received at a speaker input. The amplifier receives an analog audio input signal and provides the amplified analog audio input signal to the speaker input. The current sensor senses current passing through the speaker and provides a current sensor signal indicative thereof. The compensator circuit applies a transfer function to the current sensor signal to provide a compensation signal as feedback into the analog audio input signal, the transfer function matching at least one of resistance and inductance of the speaker.

公开(公告)号：US20180219480A1

公开(公告)日：2018-08-02

申请号：US15422183

申请日：2017-02-01

Applicant: Texas Instruments Incorporated

Inventor： Rahmi Hezar ,  Nikolaus Klemmer

IPC: H02M3/156 ,  H02M1/44 ,  H02M1/12

CPC classification number: H02M3/156 ,  H02M1/12 ,  H02M1/44

Abstract: Methods and apparatus for reducing electromagnetic interference in a power converter using phase hopping in conjunction with pulse width modulation are disclosed. An example power converter includes an input voltage to, when a control switching device receives a first voltage, increase an output voltage; and when the control switching device receives a second voltage, decrease the output voltage. The example power converter further includes a phase hopping generator to generate a phase varying signal corresponding to two or more phases, the phase varying signal corresponding to a reference voltage; and output the phase varying signal to control the control switching device.

公开(公告)号：US09385669B2

公开(公告)日：2016-07-05

申请号：US14312239

申请日：2014-06-23

Applicant: Texas Instruments Incorporated

Inventor： Aritra Banerjee ,  Joonhoi Hur ,  Baher Haroun ,  Nathan Richard Schemm ,  Rahmi Hezar ,  Lei Ding

IPC: H03F3/217 ,  H03F3/21 ,  H03F3/193 ,  H03F1/02 ,  H03F3/45

CPC classification number: H03F1/0205 ,  H03F1/0294 ,  H03F3/193 ,  H03F3/211 ,  H03F3/217 ,  H03F3/2171 ,  H03F3/2173 ,  H03F3/2176 ,  H03F3/45179 ,  H03F2200/391 ,  H03F2200/451 ,  H03F2203/21139 ,  H03F2203/21142

Abstract: An outphasing amplifier includes a first class-E power amplifier (16-1) having an output coupled to a first conductor (31-1) and an input receiving a first RF drive signal (S1(t)). A first reactive element (CA-1) is coupled between the first conductor and a second conductor (30-1). A second reactive element (LA-1) is coupled between the second conductor and a third conductor (32-1). A second class-E power amplifier (17-1) includes an output coupled to a fourth conductor (31-2) and an input coupled to a second RF drive signal (S2(t)), a third reactive element (CA-3) coupled between the second and fourth conductors. Outputs of the first and second power amplifiers are combined by the first, second and third reactive elements to produce an output current in a load (R). An efficiency enhancement circuit (LEEC-1) is coupled between the first and fourth conductors to improve power efficiency at back-off power levels. Power enhancement circuits (20-1,2) are coupled to the first and fourth conductors, respectively.

Abstract translation: 外相放大器包括具有耦合到第一导体（31-1）的输出的第一E类功率放大器（16-1）和接收第一RF驱动信号（S1（t））的输入。 第一电抗元件（CA-1）耦合在第一导体和第二导体（30-1）之间。 第二电抗元件（LA-1）耦合在第二导体和第三导体（32-1）之间。 第二类E功率放大器（17-1）包括耦合到第四导体（31-2）的输出和耦合到第二RF驱动信号（S2（t））的输入，第三反应元件（CA-3 ）耦合在第二和第四导体之间。 第一和第二功率放大器的输出由第一，第二和第三无功元件组合以在负载（R）中产生输出电流。 效率增强电路（LEEC-1）耦合在第一和第四导体之间，以提高退避功率电平的功率效率。 功率增强电路（20-1,2）分别耦合到第一和第四导体。

公开(公告)号：US20150256216A1

公开(公告)日：2015-09-10

申请号：US14203236

申请日：2014-03-10

Applicant: Texas Instruments Incorporated

Inventor： Lei Ding ,  Rahmi Hezar

IPC: H04B1/62 ,  H04L25/49

CPC classification number: H04B1/62 ,  H03F1/3241 ,  H03F1/3247 ,  H03F3/217 ,  H04B1/0475 ,  H04B2001/0425 ,  H04L25/03012 ,  H04L25/03343 ,  H04L25/49

Abstract: A method includes receiving an input signal and predistorting a baseband representation of the input signal at a carrier frequency and at one or more harmonic frequencies. The method also includes generating an output signal based on the predistorted baseband representation of the input signal, and transmitting the output signal to a power amplifier. Predistorting the baseband representation of the input signal at the carrier frequency could occur in parallel with predistorting the baseband representation of the input signal at the one or more harmonic frequencies.

Abstract translation: 一种方法包括：以载波频率和一个或多个谐波频率接收输入信号和预失真输入信号的基带表示。 该方法还包括基于输入信号的预失真基带表示产生输出信号，并将输出信号发送到功率放大器。 以载波频率预测输入信号的基带表示可以与在一个或多个谐波频率处对输入信号的基带表示进行预失真并行发生。

公开(公告)号：US20150222463A1

公开(公告)日：2015-08-06

申请号：US14172714

申请日：2014-02-04

Applicant: Texas Instruments Incorporated

Inventor： Rahmi Hezar ,  Lei Ding ,  Baher Haroun

IPC: H04L27/20 ,  H03F3/24 ,  H03F1/02 ,  H03F3/19

CPC classification number: H04L27/3411 ,  H03F1/02 ,  H03F1/0294 ,  H03F3/19 ,  H03F3/2175 ,  H03F3/245 ,  H03F2200/331 ,  H03F2200/336 ,  H03F2200/451 ,  H04B1/02 ,  H04B14/062 ,  H04L27/2053

Abstract: At least one tone is generated. An output signal is generated in response to an input signal and the at least one tone. The output signal is modulated. The input signal and the at least one tone are represented in the modulated output signal. The at least one tone is outside a bandwidth of the input signal as represented in the modulated output signal. The modulated output signal is amplified. The at least one tone in the amplified signal is attenuated after the amplifying.

Abstract translation: 至少产生一个音调。 响应于输入信号和至少一个音调产生输出信号。 输出信号被调制。 在调制输出信号中表示输入信号和至少一个音调。 至少一个音调在调制输出信号所表示的输入信号的带宽之外。 调制输出信号被放大。 放大信号中的至少一个音调在放大后衰减。

公开(公告)号：US09065476B2

公开(公告)日：2015-06-23

申请号：US13887918

申请日：2013-05-06

Applicant: Texas Instruments Incorporated

Inventor： Rahmi Hezar ,  Baher Haroun ,  Halil Kiper ,  Mounir Fares ,  Ajay Kumar

IPC: H03M1/66 ,  H03M1/74 ,  H03M3/00

CPC classification number: H03M1/66 ,  H03M1/747 ,  H03M3/464

Abstract: A system for processing a signal includes a detector configured to detect a two-level stream of bits; a converter configured to generate a three-level control signal based on two adjacent values within the two-level stream of bits; and a switch configured to determine which of three different paths to couple a current source to based on a value of the three-level control signal. Thus, based on adjacent values of the output stream a three-level control signal is generated which controls coupling of the current source to one of three different paths. This type of three-level digital-to-analog converter can be, for example, part of the feedback loop of an analog-to-digital converter. Similar techniques can also be utilized in a multi-segment digital-to-analog converter in which each segment of the DAC is controlled by a 3-level control signal and the DAC is implement using PMOS devices. The current source for each DAC segment is diverted to ground, the M-node, or the P-node depending on the value of the 3-level control signal.

Abstract translation: 一种用于处理信号的系统包括：检测器，被配置为检测两级比特流; 转换器，被配置为基于所述两级比特流内的两个相邻值生成三电平控制信号; 以及开关，被配置为基于三电平控制信号的值来确定三个不同路径中的哪一个耦合电流源。 因此，基于输出流的相邻值，生成三电平控制信号，其控制电流源与三个不同路径之一的耦合。 这种类型的三电平数模转换器可以是例如模数转换器的反馈回路的一部分。 类似的技术也可以用在多段数模转换器中，其中DAC的每个段由3电平控制信号控制，并且使用PMOS器件实现DAC。 每个DAC段的电流源根据3电平控制信号的值转移到地，M节点或P节点。

公开(公告)号：US20150070088A1

公开(公告)日：2015-03-12

申请号：US14020242

申请日：2013-09-06

Applicant: Texas Instruments Incorporated

Inventor： Lei Ding ,  Rahmi Hezar ,  Joonhoi Hur

IPC: H03H17/06

CPC classification number: H03K7/08

Abstract: A method of canceling nonlinear distortions in pulse width modulated signals includes receiving an input signal. A first signal that is the modulated input signal is generated. The first signal has quantized levels representing the input signal. A pulse width modulated (PWM) sequence that is representative of the first signal is generated. A second signal that is the PWM sequence mixed with a carrier signal is generated. An error signal is generated in response to the first signal and modeled from the second signal. The error signal is added to the input signal.

Abstract translation: 消除脉宽调制信号中的非线性失真的方法包括接收输入信号。 产生作为调制输入信号的第一信号。 第一信号具有表示输入信号的量化电平。 产生代表第一信号的脉冲宽度调制（PWM）序列。 产生与载波信号混合的PWM序列的第二信号。 响应于第一信号产生误差信号并从第二信号建模。 误差信号加到输入信号上。

公开(公告)号：US11721779B2

公开(公告)日：2023-08-08

申请号：US17246068

申请日：2021-04-30

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rahmi Hezar ,  Henry Litzmann Edwards

IPC: H01L31/107 ,  H01L31/109 ,  H01L31/02

CPC classification number: H01L31/107 ,  H01L31/02027 ,  H01L31/109

Abstract: An integrated circuit includes a photodetector that has an epitaxial layer with a first conductivity type located over a substrate. A buried layer of the first conductivity type is located within the epitaxial layer and has a higher carrier concentration than the epitaxial layer. A semiconductor layer located over the buried layer has an opposite second conductivity type and includes a first sublayer over the buried semiconductor layer and a second sublayer between the first sublayer and the buried layer. The first sublayer has a larger lateral dimension than the second sublayer, and has a lower carrier concentration than the second sublayer.

公开(公告)号：US10250192B2

公开(公告)日：2019-04-02

申请号：US15708168

申请日：2017-09-19

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Aritra Banerjee ,  Joonhoi Hur ,  Baher Haroun ,  Nathan Richard Schemm ,  Rahmi Hezar ,  Lei Ding

IPC: H03F3/217 ,  H03F1/02 ,  H03F3/193 ,  H03F3/21 ,  H03F3/45

Abstract: An outphasing amplifier includes a first class-E power amplifier having an output coupled to a first conductor and an input receiving a first RF drive signal. A first reactive element is coupled between the first conductor and a second conductor. A second reactive element is coupled between the second conductor and a third conductor. A second class-E power amplifier includes an output coupled to a fourth conductor and an input coupled to a second RF drive signal, a third reactive element coupled between the second and fourth conductors. Outputs of the first and second power amplifiers are combined by the first, second and third reactive elements to produce an output current in a load. An efficiency enhancement circuit is coupled between the first and fourth conductors to improve power efficiency at back-off power levels. Power enhancement circuits are coupled to the first and fourth conductors, respectively.

公开(公告)号：US10224811B2

公开(公告)日：2019-03-05

申请号：US15422183

申请日：2017-02-01

Applicant: Texas Instruments Incorporated

Inventor： Rahmi Hezar ,  Nikolaus Klemmer

IPC: H02J3/12 ,  G05F1/00 ,  H02M3/156 ,  H02M1/44 ,  H02M1/12

Abstract: Methods and apparatus for reducing electromagnetic interference in a power converter using phase hopping in conjunction with pulse width modulation are disclosed. An example power converter includes an input voltage to, when a control switching device receives a first voltage, increase an output voltage; and when the control switching device receives a second voltage, decrease the output voltage. The example power converter further includes a phase hopping generator to generate a phase varying signal corresponding to two or more phases, the phase varying signal corresponding to a reference voltage; and output the phase varying signal to control the control switching device.