Texas Instruments Corporation

Ankit Khanna

Dimitar Trifonov

Habib Sami Karaki

Partha Sarathi Basu

Chase Mackenzie Puglisi

A current sense amplifier includes a first amplifier stage, a second amplifier stage, a switch, and a common-mode transient detector. The first amplifier stage has a first amplifier output, a second amplifier output, a first amplifier input, and a second amplifier input. The second amplifier stage has a third amplifier input coupled to the first amplifier output, and a fourth amplifier input coupled to the second amplifier output. The switch has a switch control input, a first switch terminal coupled to the third amplifier input, and a second switch terminal coupled to the fourth amplifier input. The common-mode transient detector circuit has a detector output, a first detector input and a second detector input. The detector output is coupled to the switch control input. The first detector input is coupled to the first amplifier input. The second detector input is coupled to the second amplifier input.

Current sense amplifier

A system including an integrated circuit chip also includes a microcontroller in the chip and an algorithm for execution by the microcontroller. The algorithm includes addition, subtraction, and multiplication operators (e.g.) and shift-left and shift-right operators (e.g.,) configured for solving particular equations (Eqns. 1-4). Input numbers are within particular ranges to allow the shift operators to shift binary bits so each number so it fits within a register of a particular width. An IR sensor () may convert IR radiation () to produce a voltage (V) representing the temperature (T) of an IR emitting object (). The algorithm () operates in conjunction with the microcontroller () to convert the voltage (V) into a value representing the temperature (T) of the remote object () without keeping track of decimal points and resolution of the numbers.

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Tucson, AZ, United States of America

Ankit Khanna