Articles and news - 5

simple fully automatic 12V uninterruptible power
A simple and fully automatic, 12V uninterruptible power supply system for small/medium power appliances
07.22.2021 Circuits

This is a simple and fully automatic, 12 V uninterruptible power supply system for small/medium power appliances...

Voltage reference improves JFET
Voltage reference improves JFET
07.22.2021 Circuits

The common JFET current-source has average output impedance and depends heavily on the JFET's VP and IDSS variations. These manufacturing variations limit the initial accuracy of the current setpoint that the circuit can obtain with a fixed R1...

Circuit provides constant current ISFETs MEMFETs
Circuit provides constant current for ISFETs/MEMFETs
07.21.2021 Articles

ISFETs and MEMFETs (ion-sensitive and membrane FETs) are solid-state chemical sensors that provide an electrical signal associated with the change of a chemical concentration in a solution. These types of sensors need a stable operating point...

LED driver doubles as fault monitor
LED driver doubles as fault monitor
07.20.2021 Circuits

LEDs find wide use as indicators and as light emitters in devices such as optocouplers. In some applications, the LED or the emitter may be located remotely at some distance from the main unit...

Portable Power Inverter Circuit
Portable Power Inverter Circuit
07.19.2021 Circuits

Recently, my neighbor expressed a deep interest in building a low-power inverter from scratch. This portable power inverter takes the dc output from a low-voltage accumulator and creates a stable 230-VAC/50-Hz mains suitable for powering small items of equipment...

Power inverter is bidirectional
Power inverter is bidirectional
07.15.2021 Circuits

If you want to swap charge in either direction between unevenly loaded positive and negative battery buses, you need an inverting dc transformer. One implementation is the symmetrical flyback converter...

Maximize power density three-level buck-switching chargers.
Maximize power density with three-level buck-switching chargers. Part 2
07.15.2021 Articles

Off-chip losses include those across the equivalent series resistance in the input, output and flying capacitors, as well as the inductor. Choosing ceramic capacitors with very low (<20 mΩ) ESR renders their losses almost negligible...

Maximize power density three-level buck-switching chargers.
Maximize power density with three-level buck-switching chargers. Part 1
07.14.2021 Articles

Modern portable electronic devices require a high-capacity Lithium-ion battery to power popular features such as high-definition cameras, edge-to-edge high-resolution touchscreens and high-speed data connections...

Using Copper Traces As Ballast Resistors
Using Copper Traces As Ballast Resistors Ensures Balance
07.13.2021 Circuits

The data sheet for the LT3080 linear voltage regulator suggests using printed-circuit-board traces for ballast resistors. Although the LT3080’s low offset voltage suits it well for this technique, it can be used for other ballast applications...

Analog Devices Announces Long-Reach Industrial Ethernet
Analog Devices Announces Long-Reach Industrial Ethernet Offerings to Achieve Last Mile Connectivity in Process, Factory and Building Automation
07.13.2021 News

Analog Devices expanded its ADI Chronous Industrial Ethernet portfolio with solutions that bring long-reach Ethernet connectivity from the edge to the cloud and enable real-time configurability, lower energy consumption, and increased asset utilization...