公开(公告)号：US10333478B1

公开(公告)日：2019-06-25

申请号：US15848808

申请日：2017-12-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Martijn Fridus Snoeij ,  Sudarshan Udayashankar

IPC: H03F3/45 ,  H03F3/16

Abstract: An input stage of an operational amplifier receives first and second input voltages. An output slew detection circuit decreases a first current responsive to slewing of an output of the operational amplifier and increases the first current responsive to no slewing. A slew boost and differential input voltage detection generates a second current at a first level when the first and second input voltages are approximately equal and to generate the second current at a second level, smaller than the first level, responsive to the first and second input voltages not being approximately equal. A voltage on a capacitor increases responsive to the first current from the output slew detection circuit increasing and responsive to the second current being at the second level. A current mirror is activated responsive to the voltage on the capacitor exceeding a second threshold. The current mirror decreases a third current of the input stage.

公开(公告)号：US11616504B2

公开(公告)日：2023-03-28

申请号：US17715605

申请日：2022-04-07

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sudarshan Udayashankar ,  Martijn Fridus Snoeij

IPC: H03K17/082 ,  H01L29/66

Abstract: An amplifier overload power limit circuit, system, and a method thereof comprising a monitoring of a current gain of a BJT based on a current detector and limiting power to the BJT based on the monitored current gain to prevent the BJT from driven into a saturation mode and the amplifier overdrive.

公开(公告)号：US11309882B2

公开(公告)日：2022-04-19

申请号：US16722454

申请日：2019-12-20

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sudarshan Udayashankar ,  Martijn Fridus Snoeij

IPC: H03K17/082 ,  H01L29/66

Abstract: An amplifier overload power limit circuit, system, and a method thereof comprising a monitoring of a current gain of a BJT based on a current detector and limiting power to the BJT based on the monitored current gain to prevent the BJT from driven into a saturation mode and the amplifier overdrive.

公开(公告)号：US11777463B2

公开(公告)日：2023-10-03

申请号：US17349393

申请日：2021-06-16

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sudarshan Udayashankar ,  Viola Schaffer

IPC: H03G3/30 ,  H03F3/04 ,  H03F3/45

CPC classification number: H03G3/30 ,  H03F3/04 ,  H03F3/45 ,  H03F2200/261 ,  H03G2201/103

Abstract: A system includes an instrumentation amplifier (INA) including a first transistor coupled to a first input node, and a second transistor coupled to a second input node. The INA also includes a resistor coupled between the first transistor and the second transistor. The INA includes a gain resistor network coupled to the resistor and to the first and second transistors, where the gain resistor network includes two or more gain resistors. The system also includes a voltage to current converter, where the voltage to current converter is coupled to the resistor and the gain resistor network.