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公开(公告)号：US09985589B2
公开(公告)日：2018-05-29
申请号：US15242203
申请日：2016-08-19
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Srinivas K. Pulijala , Steven G. Brantley , Bharath K. Vasan
CPC classification number: H03F1/3211 , G05F1/561 , H03F3/26 , H03F3/45 , H03F3/45085 , H03F3/45139 , H03F3/45183 , H03F2200/69 , H03F2203/45134 , H03F2203/45288 , H03F2203/45392 , H03F2203/45722
Abstract: A voltage-to-current converter includes a first differential pair of transistors, a second differential pair of transistors, and a first resistor. The first differential pair of transistors includes a first transistor and a second transistor. An emitter of the first transistor is directly connected to an emitter of the second transistor. The second differential pair of transistors includes a third transistor and a fourth transistor. An emitter of the third transistor is directly connected to an emitter of the fourth transistor. The first resistor is connected to the emitter of the first transistor, the emitter of the second transistor, the emitter of the third transistor, and the emitter of the fourth transistor.
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公开(公告)号：US09467096B2
公开(公告)日：2016-10-11
申请号：US14642317
申请日：2015-03-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Srinivas K. Pulijala , Steven G. Brantley
CPC classification number: H03F1/0266 , H03F3/211 , H03F3/4508 , H03F3/72 , H03F2200/261 , H03F2200/27 , H03F2200/411 , H03F2200/432 , H03F2203/45154 , H03F2203/45248 , H03F2203/45674 , H03F2203/45676 , H03F2203/45702
Abstract: One example includes an amplifier system. The system includes a precision amplifier portion comprising a first input stage configured to receive an input voltage and a first output stage configured to generate an output voltage at the first output stage based on the input voltage. The system also includes a slew amplifier portion arranged in parallel with the precision amplifier portion and comprising a second input stage that receives the input voltage and a second output stage. The slew amplifier portion can be activated in response to a detected slew condition associated with the input voltage to generate the output voltage based on the input voltage.
Abstract translation: 一个例子包括放大器系统。 该系统包括精密放大器部分，其包括被配置为接收输入电压的第一输入级和被配置为基于输入电压在第一输出级产生输出电压的第一输出级。 该系统还包括与精密放大器部分并联设置并包括接收输入电压的第二输入级和第二输出级的转换放大器部分。 可以响应于与输入电压相关联的检测到的转换条件来激活转换放大器部分，以基于输入电压产生输出电压。
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公开(公告)号：US10560064B2
公开(公告)日：2020-02-11
申请号：US16555206
申请日：2019-08-29
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： Steven G. Brantley , Bharath Karthik Vasan , Srinivas K. Pulijala , Martijn Snoeij
Abstract: In examples, a system comprises a differential amplifier coupled to a parasitic capacitor positioned between a first node and a first reference voltage source. The system comprises a buffer amplifier having an input terminal and an output terminal, the input terminal coupled to the first node and the output terminal coupled to a cancellation capacitor. The system includes a controlled current source coupled to the first node and the input terminal, the controlled current source coupled to a second reference voltage source. The system comprises a current sense circuit coupled to the cancellation capacitor and the second reference voltage source.
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公开(公告)号：US20170366142A1
公开(公告)日：2017-12-21
申请号：US15187071
申请日：2016-06-20
Applicant: Texas Instruments Incorporated
Inventor： Sergey V. Alenin , Steven G. Brantley
CPC classification number: H03F1/3211 , H03F1/34 , H03F3/187 , H03F3/26 , H03F3/3069 , H03F3/45085 , H03F3/45475 , H03F2203/45112 , H04R3/04 , H04R2201/028
Abstract: A circuit and method for an audio op-amp that is configured to minimize crossover distortion between push and pull components of the audio op-amp. The audio op-amp includes an input stage that receives differential input signals and generates an output that amplifies the difference between the input signals. The audio op-amp further includes an output stage that receive the amplified signal and generate an audio output signal for playback by a speaker system. The output stage includes a diamond driver circuit that buffers the input stage from the speaker system, a boost circuit that includes a pair of boosting transistors that amplify the current of the amplified signal, and a biasing circuit that provides bias currents to the transistors of the boost circuit in a manner that minimizes crossover distortion between the boosting transistors.
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公开(公告)号：US10193501B2
公开(公告)日：2019-01-29
申请号：US15876561
申请日：2018-01-22
Applicant: Texas Instruments Incorporated
Inventor： Srinivas K. Pulijala , Steven G. Brantley
Abstract: An amplifier includes an amplifier input and an amplifier output. A compensation network is coupled to the amplifier output. The compensation network includes at least one RC network tuned to a frequency in which the amplifier operates. The compensation network provides at least one zero to compensate for at least one pole introduced by a load coupled to the amplifier output.
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Patent Agency Ranking
公开(公告)号：US09917553B2
公开(公告)日：2018-03-13
申请号：US15187071
申请日：2016-06-20
Applicant: Texas Instruments Incorporated
Inventor： Sergey V. Alenin , Steven G. Brantley
CPC classification number: H03F1/3211 , H03F1/34 , H03F3/187 , H03F3/26 , H03F3/3069 , H03F3/45085 , H03F3/45475 , H03F2203/45112 , H04R3/04 , H04R2201/028
Abstract: A circuit and method for an audio op-amp that is configured to minimize crossover distortion between push and pull components of the audio op-amp. The audio op-amp includes an input stage that receives differential input signals and generates an output that amplifies the difference between the input signals. The audio op-amp further includes an output stage that receive the amplified signal and generate an audio output signal for playback by a speaker system. The output stage includes a diamond driver circuit that buffers the input stage from the speaker system, a boost circuit that includes a pair of boosting transistors that amplify the current of the amplified signal, and a biasing circuit that provides bias currents to the transistors of the boost circuit in a manner that minimizes crossover distortion between the boosting transistors.
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公开(公告)号：US20170141733A1
公开(公告)日：2017-05-18
申请号：US15419014
申请日：2017-01-30
Applicant: Texas Instruments Incorporated
Inventor： Srinivas K. Pulijala , Steven G. Brantley
CPC classification number: H03F1/02 , H03F1/14 , H03F3/20 , H03F2200/135 , H03F2200/153 , H03F2200/171 , H03F2200/297 , H03F2200/408
Abstract: An amplifier includes an amplifier input and an amplifier output. A compensation network is coupled to the amplifier output. The compensation network includes at least one RC network tuned to a frequency in which the amplifier operates. The compensation network provides at least one zero to compensate for at least one pole introduced by a load coupled to the amplifier output.
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公开(公告)号：US09912294B2
公开(公告)日：2018-03-06
申请号：US15419014
申请日：2017-01-30
Applicant: Texas Instruments Incorporated
Inventor： Srinivas K. Pulijala , Steven G. Brantley
CPC classification number: H03F1/02 , H03F1/14 , H03F3/20 , H03F2200/135 , H03F2200/153 , H03F2200/171 , H03F2200/297 , H03F2200/408
Abstract: An amplifier includes an amplifier input and an amplifier output. A compensation network is coupled to the amplifier output. The compensation network includes at least one RC network tuned to a frequency in which the amplifier operates. The compensation network provides at least one zero to compensate for at least one pole introduced by a load coupled to the amplifier output.
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公开(公告)号：US20150263674A1
公开(公告)日：2015-09-17
申请号：US14642317
申请日：2015-03-09
Applicant: TEXAS INSTRUMENTS INCORPORATED
Inventor： SRINIVAS K. PULIJALA , Steven G. Brantley
CPC classification number: H03F1/0266 , H03F3/211 , H03F3/4508 , H03F3/72 , H03F2200/261 , H03F2200/27 , H03F2200/411 , H03F2200/432 , H03F2203/45154 , H03F2203/45248 , H03F2203/45674 , H03F2203/45676 , H03F2203/45702
Abstract: One example includes an amplifier system. The system includes a precision amplifier portion comprising a first input stage configured to receive an input voltage and a first output stage configured to generate an output voltage at the first output stage based on the input voltage. The system also includes a slew amplifier portion arranged in parallel with the precision amplifier portion and comprising a second input stage that receives the input voltage and a second output stage. The slew amplifier portion can be activated in response to a detected slew condition associated with the input voltage to generate the output voltage based on the input voltage.
Abstract translation: 一个例子包括放大器系统。 该系统包括精密放大器部分，其包括被配置为接收输入电压的第一输入级和被配置为基于输入电压在第一输出级产生输出电压的第一输出级。 该系统还包括与精密放大器部分并联设置并包括接收输入电压的第二输入级和第二输出级的转换放大器部分。 可以响应于与输入电压相关联的检测到的转换条件来激活转换放大器部分，以基于输入电压产生输出电压。
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10.发明授权Compensation circuitry and method for amplifiers driving large capacitive loads 有权用于驱动大容性负载的放大器的补偿电路和方法公开(公告)号：US08890610B2
公开(公告)日：2014-11-18
申请号：US13761357
申请日：2013-02-07
Applicant: Texas Instruments Incorporated
Inventor： Steven G. Brantley , Vadim V. Ivanov
CPC classification number: H03F3/45071 , H03F1/223 , H03F3/45192 , H03F2200/411
Abstract: An operational amplifier (10) capable of driving a capacitive load (CLOAD) and/or a resistive load (RLOAD) includes a first gain stage (2) having an output coupled to a high impedance node (3) and a second gain stage (5) having an input coupled to the first high impedance node. A gain reduction resistor (RD) and an AC coupling capacitor (CD) are coupled in series between the high impedance node and a reference voltage. A Miller feedback capacitor (CM) is coupled between an output conductor (7) of the second gain stage and the high impedance node. The output of the second gain stage may be coupled to the high impedance node by a cascode transistor (MCASCODE).
Abstract translation: 能够驱动电容性负载（CLOAD）和/或电阻负载（RLOAD）的运算放大器（10）包括：第一增益级（2），其具有耦合到高阻抗节点（3）和第二增益级（ 5）具有耦合到第一高阻抗节点的输入。 增益减小电阻（RD）和AC耦合电容（CD）串联耦合在高阻抗节点和参考电压之间。 米勒反馈电容器（CM）耦合在第二增益级的输出导体（7）和高阻抗节点之间。 第二增益级的输出可以通过共源共栅晶体管（MCASCODE）耦合到高阻抗节点。
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