The electronic circuit injects a precise 1 Amp of current into any unknown resistor, up to about two ohms. Two alkaline C cells power the complete circuit...
1 amp current injector circuit
Operational amplifier for electrochemical sensors
This article discusses the applications of an operational amplifier for electrochemical gas sensors such as ethanol and carbon monoxide...
A two-way Wilson current mirror
Recently, I published a Design Idea describing a bidirectional current mirror using just two transistors and a diode. That circuit works well in some applications, like the one shown in the DI itself, but it nevertheless has limitations due to various error-introducing effects...
pSemi announces high-performance UltraCMOS+ mmWave SPDT switch
pSemi Corporation, a Murata company announced the introduction of a new high-performance mmWave SPDT RF switch: the PE42528...
Solar storms and their potential to create electronic chaos
Solar events have destroyed grids, set wires on fire, downed satellites. Are we ready for the next big one?...
A two-wire temperature transmitter using an RTD sensor
With a fortnight’s struggle, I completed the design of 4 mA to 20 mA, two-wire temperature transmitter using a platinum resistance temperature detector (RTD) sensor, as shown in Figure...
Circuit controls microneedle etching
At its invention roughly four decades ago, STM created a sensation because it was the first technology to make atomic-scale-resolution imaging a routine procedure. An essential requirement for the practical application of STM is some means for the reproducible fabrication of supersharp, atomic-scale needle tips...
Simple, low-voltage charge-pumps. Part 2 - Alternatives
The voltage booster is a 'true' charge pump. When the output of the 555 is low...
Vishay Intertechnology introduces new high-reliability isolation amplifiers with industry-leading CMTI for precision applications
Vishay Intertechnology announced the release of its latest isolation amplifiers, the VIA0050DD, VIA0250DD, and VIA2000SD. These new devices offer enhanced performance for a wide range of industrial, automotive, and medical applications...
Power amplifiers that oscillate - deliberately. Part 2 - A crafty conclusion
In this second part, we’ll turn that semi-decency into something even more respectable, concentrating on minimizing distortion and ignoring the siren song of raw power...
