Using Cavity Filters for High Precision and Reliability in Narrow Band

Posted by doEEEt Media Group
On March 10, 2020
0

Many microwave applications, such as repeaters, and electronic warfare equipment, require increased spectral resolution. This means these devices only need to look at a narrow slice of a given band.

EEE Components, PASSIVES

University College London Developed Fast-charging, Long-running, Bendable Supercapacitors

Posted by doEEEt Media Group
On March 9, 2020
0

While the supercapacitor developed by the team has a comparable energy density to state-of-the-art value of lead-acid batteries, its power density is two orders of magnitude higher at over 10,000 Watt per litre.

EEE Components, Non-standard testing

Fibers Elongation: methods and solutions

Posted by doEEEt Media Group
On March 9, 2020
0

Optical fibers are delicate elements that can break easily, and their repair is not as simple as an electric wire. The optical fibers suffer great stress in the outdoor installations due to weather conditions and the installation itself.

ABC of CLR, EEE Components, PASSIVES

Thermal Noise, Current Noise & Corrosion on Resistors

Posted by Tomáš Zedníček
On March 6, 2020
0

Noise manifests itself as a spontaneously fluctuating voltage whose instantaneous amplitude is randomly distributed. The instantaneous value is both unpredictable and of minor interest except in certain critical applications. Instead, one measures a time-averaged value. It consists of the root of the mean-square value of voltage transmitted in a particular frequency pass band.

EEE Components, PASSIVES

DC-AC Bias Dependence of MLCC Capacitors

Posted by doEEEt Media Group
On March 6, 2020
0

The capacitance of certain capacitors depends not only on the chosen dielectric material, geometry and temperature but also on the DC and AC bias applied to the part

ABC of CLR, EEE Components, PASSIVES

Construction and Types of Wirewound Resistors

Posted by Tomáš Zedníček
On March 6, 2020
0

As the name indicates wire-wound resistors consist of a resistive wire wound on a bobbin and supplied with a protective coating. Since the resistance wire never can serve as a termination wire because of solderability requirements, it has to be connected to the terminal leads or the like, usually by welding or brazing. The higher the resistance value the thinner the wire that has to be used and thus the greater the risk of open circuits due to deficient weldings, damage from corrosion or from mechanical handling. Below a diameter, Φ, of 0.1 mm (4 mils) the failure rate grows rapidly.

ABC of CLR, EEE Components

Talking about Non-Wirewound Resistors: Carbon, SMD and Network

Posted by Tomáš Zedníček
On March 5, 2020
0

Carbon film resistors sometimes are called surface layer resistors. Better qualities are classified as “stable” with a ΔR/R that will stop at ≤1%. Their role has, to a great extent, been taken over by the metal film but they still have a market, especially as cheap 5 percent E 24 components. At new designs, one should yet consider replacing them with metal film resistors that also are offered in E 24, 5 percent.

EEE Components, PASSIVES

Rising Price of Palladium Could Impact High-Reliability MLCC Markets in 2020

Posted by doEEEt Media Group
On February 27, 2020
0

Palladium’s price has exhibited extreme volatility since 2012, with continual rises in price from August 2019 through January 2020. The price hit its 25-year high in January 2020 which created short-term forecasts suggesting an increase in production costs for speciality MLCCs. Further rises in price are expected in 2020

ABC of CLR, EEE Components, PASSIVES, PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Mounting Guidelines: PCB Board Design and Handling

Posted by Tomáš Zedníček
On February 27, 2020
0

Board Design and Component Pre-Assembly Preparation The leads of leaded components shall be bent and often cut to the right length before they are mounted/soldered to the substrate. Lead cutting, bending and mounting are operations that may be hazardous if they are not performed properly.

ACTIVES, EEE Components, ENDURANCE, ENVIRONMENTAL & RADIATION, PHYSICAL, MECHANICAL & ASSEMBLY, TESTING

Hermetic Packages in Space Environment

Posted by Javier Alejandro de la Ossa Fernández
On February 27, 2020
0

The general specification for hybrid microcircuits (MIL-PRF-38534) details the qualification and testing requirements for non-hermetic packages for military and space applications, and the MIL-PRF-38535 proposed class Y monolithic microcircuits for non-hermetic space level.

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