The simple circuit uses a low-current-drain MAX4073H amplifier to sense the current flowing through a 4- to 20-mA loop. The circuit senses the current through a 1 Ω resistor with a fixed gain of 100 and uses no battery or dc power supply...
A 4- to 20-mA loop needs no external power source
Simple circuit forms peak/clipping indicator
The simple peak detector is the result of a need for a single-5V-supply, level/clipping indicator for a multimedia-PC sound system. The design is unique in that it detects both stereo channels on a single peak-hold capacitor...
Understanding grounding, shielding, and guarding in high-impedance applications. Part 2
The safety shield surrounds the electrostatic shield, protecting the instrument user from hazardous voltages on the DUT, or the measurement leads...
Infineon introduces industry's first USB PD 3.1 high-voltage microcontroller with higher wattage support
Infineon Technologies introduced the industry’s first high-voltage microcontroller with USB Power Delivery 3.1 support...
Understanding grounding, shielding, and guarding in high-impedance applications. Part 1
Inadequate shielding and bad grounding are often blamed when measurements are inaccurate, especially in high-impedance applications. In fact, shielding and grounding problems are frequently responsible for measurement errors, but many test system developers aren’t quite sure why...
Measuring inductance: Design Idea discussion
Jim McLucas, author of the Design Idea Circuit measures capacitance or inductance wanted to respond to some discussion about using this Design Idea...
Circuit measures capacitance or inductance
Engineers usually have access to signal and function generators, as well as frequency counters and oscilloscopes, but they may not have access to capacitance or inductance meters...
A simple and fully automatic, 12V uninterruptible power supply system for small/medium power appliances
This is a simple and fully automatic, 12 V uninterruptible power supply system for small/medium power appliances...
Voltage reference improves JFET
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 for ISFETs/MEMFETs
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...
