公开(公告)号：US20230118397A1

公开(公告)日：2023-04-20

申请号：US17501210

申请日：2021-10-14

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： VADIM VALERIEVICH IVANOV ,  Srinivas Kumar Pulijala

IPC: H03F3/393 ,  H03F3/45

Abstract: In examples of a chopper operational amplifier, a current control circuit comprises a pair of voltage sources, each of which may be varied to generate a voltage signal of a particular value, and multiple inverters, each of which is configured to receive either a clock signal or its complement signal and one of the voltage signals. Based on these inputs, each inverter generates a control signal that is delivered to a corresponding switch in the input stage of the chopper operational amplifier to control the gate voltage of that switch. Based on the difference between the values of the voltage signals, the current control circuit operates to reduce the amplitudes of base currents induced by charge injection at the input terminals of the chopper operational amplifier.

公开(公告)号：US20180191306A1

公开(公告)日：2018-07-05

申请号：US15394399

申请日：2016-12-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： VADIM VALERIEVICH IVANOV ,  JERRY L. DOORENBOS

IPC: H03F1/02 ,  H03F3/45

CPC classification number: H03F1/0205 ,  H03F1/3247 ,  H03F3/187 ,  H03F3/195 ,  H03F3/45179 ,  H03F2200/471 ,  H03F2200/555 ,  H03F2203/45074

Abstract: An integrated circuit (IC) chip can include an operational amplifier with adjustable operational parameters. The IC chip can also include a trimming module configured to measure an output voltage of the operational amplifier in response to at least one of detecting that the operational amplifier has a positive supply voltage set to a level greater than a predetermined level and detecting a given common mode voltage at inverting and non-inverting inputs of the operational amplifier. The trimming module can also be configured to adjust the operational parameters of the operational amplifier based on the output voltage to trim the operational amplifier.

公开(公告)号：US20140266311A1

公开(公告)日：2014-09-18

申请号：US13869634

申请日：2013-04-24

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： VADIM VALERIEVICH IVANOV ,  RAVI BALASINGAM ,  RITU SHREE

IPC: H03K3/01

CPC classification number: H03K3/01 ,  G01R19/16542 ,  G01R19/16576 ,  G06F1/1626 ,  G06F1/28 ,  H02H3/207

Abstract: A power supervisor circuit is provided. The circuit includes a first sample circuit that periodically samples a first reference voltage derived from a high output rail of a voltage source and generates a first sampled output voltage. The circuit includes second sample circuit that periodically samples a second reference voltage associated with a low output rail of the voltage source and generates a second sampled output voltage. A voltage supervisor in the circuit generates a trip point signal when a combination of the first and second sampled output voltage crosses a predetermined threshold indicating that the voltage source output voltage has fallen below a desired output voltage.

Abstract translation: 提供电源管理电路。 电路包括第一采样电路，其周期性地对从电压源的高输出轨导出的第一参考电压进行采样，并产生第一采样输出电压。 电路包括第二采样电路，周期性地对与电压源的低输出轨相关联的第二参考电压进行采样，并产生第二采样输出电压。 当第一和第二采样输出电压的组合跨过预定阈值，指示电压源输出电压已经低于期望输出电压时，电路中的电压监控器产生跳变点信号。