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Electronic product launches

Cellular Telecommunications

dPMR - What You Need to Know

dPMR - digital private, personal, professional mobile radio is a relatively new standard that is coming to the PMR market. Offering low cost but effective communications, this standard is built around a narrowband FDMA technology to provide very spectrum efficient operation.

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• TUTORIAL: PMR446

RF Topics

RF Attenuators

RF attenuators are used in many RF designs to reduce signal levels and also to ensure that the correct impedance matches are obtained. Resistive ones can be made from just three resistors, while variable ones using PIN diodes use a few more. Read more . . .

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• SUMMARY: RF resistor attenuators
• SUMMARY: PIN diode variable attenuator

Electronics Components

Semiconductor Memory Technologies

Semiconductor memory is a particularly important element for today's electronics arena. Memory is an essential part of any processor circuit, and with the ever increasing number of processor driven items of equipment and their growing complexity, so there is a rising demand for more and larger memories. Read more . . .

• SUMMARY: Dynamic RAM, DRAM

Formulae and Data

Essential Elements of Inductance

Inductance is a key electrical and electronic phenomenon. However, can you remember all the equations and features. Brush up on your knowledge with our pages of key facts, formulae and data. Read more . . .

• SUMMARY: Self-inductance
• SUMMARY: Inductive reactance

Technology History

History of the Coherer

The coherer was one of the earliest types of detector used with early wireless sets. Although very insensitive and difficult to use in the presence of interference, it was the best detector for many years being an essential element within many radio communication systems Read more ...

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• HISTORY: History of the Radio Receiver

Electronics Manufacture

Guide to Choosing an EMS Partner

Willie MacKinnon, Vice President, Plexus, outlines the questions every medical OEM should ask before appointing an EMS Electronics Manufacturing Services partner. Read more...

RF Topics

Centralise Your Adaptive Traffic Management

Chris Koopmans, Chief Operating Officer, Bytemobile looks at the key issue of traffic management on modern cellular telecommunications networks. Read more...

RF Topics

Locating Passive Intermodulation, PIM Faults

Paul Holes, RF and Microwave Field Applications Engineer, Anritsu looks reducing the cost of repairing passive intermodulation, PIM faults in cellular base stations, Read more...

• TUTORIAL: PIM basics
• TUTORIAL: PIM testing

Electronics Components

Capacitor Types

There is more to capacitor technology than meets the eye. There are many different types of capacitor and with their technology advancing swiftly, their performance is increasing - more capacitance per unit volume, higher stability, higher voltages and much more. Discover what types to use and more about their properties in our tutorial pages. Read more . . .

• SUMMARY: Capacitor applications / uses
• SUMMARY: Polystyrene capacitor

Electronic Components

P-RAM, Phase change RAM / PCM Phase Change Memory

A new form of semiconductor memory called Phase change RAM, P-RAM, or Phase Change Memory, PCM is being developed and promises some significant advantages once it can be commercialised. Read more . . .

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• TUTORIAL: DRAM
• SUMMARY: SDRAM

Wireless

Bluetooth Technology

Bluetooth technology is now well established, providing communications for many short range applications - possibly the most widely used is for wire-less headsets for mobile phones. With the growing need for increased data rates for wireless communications for short ranges, Bluetooth has released new updates to the standard as well as a low energy version. Read more . . .

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• SUMMARY: Bluetooth radio interface & modulation
• SUMMARY: Bluetooth host - L2CAP, SDP, GAP
• SUMMARY: Bluetooth low energy, Wibree

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