Rohde & Schwarz
Rohde & Schwarz

What is LTE CA, Carrier Aggregation

Essential information & tutorial about 4G LTE Advanced CA, carrier aggregation or channel aggregation used to enable high data rates on using multiple LTE channels.


Cat's Whisker or Crystal Radio Detector

Details of the cat's whisker radio detector or crystal detector - how this detector worked, the different types and the history of its development.


Types of Diode

Summary of the different types of diodes used in electronics with links to further in-depth pages on individual diode types with circuit design details.

Capacitor Smoothing Circuits & Calculations

Notes, details & calculations for smoothing capacitor circuits used with rectifiers with details of ripple voltage and ripple current.

Facts of the day

1 September 2014

History - On 1st September 1486 in Venice Italy, the first copyright was issued. Then in 1859, the first observation of a solar flare was made by astronomer Richard Carrington and later in 1979 that the the American Pioneer 11 spacecraft became the first spacecraft pass by Saturn.

Quote - The greatest mistake you can make in life is to be continually fearing you will make one. - Elbert Hubbard (1856-1915)

The way things are - When all else fails, read the instructions.


Current Sense Transformer Performance

Paul Lee, Director of Business Development, Murata Power Solutions UK, describes some techniques to employ to achieve best performance for current transformers used for monitoring, control and protection news from

GPS GLONASS, Galileo and BeiDou for Mobile Devices
GPS GLONASS, Galileo and BeiDou for Mobile Devices

Ivan G Petrovski
Location services are an increasingly important element for mobile handsets....
Read more . .

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