Convert a 4-20 mA signal to 0-20 mA and deliver it to a grounded load with no additional power supply needed...
Current converter performs purely on paltry phantom power
Achieving "zero" current consumption multi-function load switch ICs XC8115/XC8116 series
Torex has developed the XC8115/XC8116 Series, multifunction load switch ICs that achieve 0 µA current consumption...
Optimized power supply measurement setup
Before a circuit designer decides on a particular power supply, he or she will first want to test it carefully...
Filter impedance control
Input impedances presented by lowpass and highpass filters in their respective stop bands are usually not controlled and can vary quite widely...
Eight solar cell lithium-ion battery charger
A single lithium ion battery cell needs 4.2 V from a current source to insure it is fully charged. A solar panel with just enough individual cells...
Fundamentals of communications access technologies: FDMA, TDMA, CDMA, OFDMA, AND SDMA
An introduction to the access technologies that allow multiple users to share a common communications channel...
Painlessly convert Hz to 4-20mA current loop
The iconic LM2917 tackles frequency-to-current conversion with (very) few externals...
Solid state airflow sensor with linear 4-20mA output
A self-heated Darlington transistor pair makes a simple, sensitive, and sturdy airflow sensor...
Isolated remote switch circuit
There are many applications when a remote switch’s on/off status needs to be monitored...
Position sensor gets linear 4 to 20mA current source output
A linearized output is a useful elaboration of a capacitive sensor design. But what if the circuit is located a significant distance from the control electronics?...