Texas Instruments Corporation

Semiconductor Components Industries, LLC

Gerald William Steele

Sreenivasan Kalyani Koduri

Steven Alfred Kummerl

Ubol Udompanyavit

Jason Marc Cole

Tony Ray Larson

Cornel D Stanescu

David Baum

Edward Mullins

Shoubao Yan

Cristian Marian Dinca

An instrumentation amplifier with an electronically adjustable gain is disclosed. The gain is adjusted by electronically controlling a resistance coupled to a feedback portion of the instrumentation amplifier. The resistance is adjusted by switches controlled by resistor-control signals references to a common mode voltage appearing at the input of the instrumentation amplifier. Accordingly, the instrumentation amplifier is capable of accommodating a high voltage range of common mode voltages while still providing controllable gain.

Gain-control circuit and method for instrumentation amplifiers

A hot swap controller includes a shunt resistor (-) and a power transistor (-) having a source coupled to a load maintains the first power transistor in a fully-turned-on condition to cause it to deliver a load current contribution (I) which flows through the shunt resistor and the power transistor to the load (). Current sensing circuitry (-) produces a first control signal (V-V) equal to the difference between a DC component (V) proportional to a first load current contribution (I) flowing in the first shunt resistor and a feedback-based component (V). A control amplifier (-) produces a second control signal (V) in response to the first control signal to modify a drive signal (-) to the power transistor so as to reduce a channel resistance of the power transistor if the first control signal exceeds a predetermined level.

Minimum loss and wiring circuit and method for paralleling hot swap controllers

An integrated circuit package that comprises a lead frame, an integrated circuit located on the lead frame and a shunt resistor coupled to the lead frame and to the integrated circuit. The shunt resistor has a lower temperature coefficient of resistance than the lead frame, and the lead frame has a lower resistivity than the shunt resistor. The shunt resistor has a low-resistance coupling to external leads of the lead frame, or, the shunt resistor has its own integrated external leads.

Manufacturing method for integrating a shunt resistor into a semiconductor package

A differential amplifier (D) includes circuitry (,R,R) coupling a common mode component of an input voltage (Vin&#x2212;Vin) to a maximum voltage selector circuit () that produces an internal voltage (V) equal to the larger of a first supply voltage (V) and the common mode component. An input amplifier circuit () of the differential amplifier is powered by the internal voltage. The input voltage (Vin&#x2212;Vin) is coupled to inputs (A,B) of the input amplifier circuit (). Outputs (A,B) of the input amplifier circuit () are amplified by an output amplifier ().

High-voltage differential amplifier and method using low voltage amplifier and dynamic voltage selection

An integrated circuit current shunt amplifier (A) includes an amplifier () having a (+) input connected to a first terminal (A) of a shunt resistor (R). An output transistor () has a gate coupled to an output of the amplifier, a source coupled to a (&#x2212;) input of the amplifier, and a drain coupled to a first terminal of an output resistor (R). A gain resistor (R) is coupled between the (&#x2212;) input of the amplifier and a second terminal of the shunt resistor. The gain resistor has a temperature coefficient which is essentially the same as that of the shunt resistor. A voltage regulator () can be coupled between the second terminal of the shunt resistor and a low-side supply voltage terminal () of the amplifier. A charge pump () can provide a below-ground voltage on a second terminal of the output resistor. A difference amplifier () coupled to the drain and referenced to the below-ground voltage produces an output voltage (Vout) referenced to ground.

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Tucson, AZ, United States of America

Gerald William Steele