Analog front-end

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Atheros Intellon 1200 AFE-Chip as companion for an INT 5500 PowerLine-IC Atheros Intellon 1200 AFE.jpeg
Atheros Intellon 1200 AFE-Chip as companion for an INT 5500 PowerLine-IC

An analog front-end (AFE or analog front-end controller AFEC) is a set of analog signal conditioning circuitry that uses sensitive analog amplifiers, often operational amplifiers, filters, and sometimes application-specific integrated circuits for sensors, radio receivers, and other circuits to provide a configurable and flexible electronics functional block needed to interface a variety of sensors to an antenna, analog-to-digital converter or, in some cases, to a microcontroller.

A radio frequency AFE is used in radio receivers, known as an RF front end. [1]

Modules

AFE hardware modules are used as interface sensors for many kinds of analog and digital systems, providing hardware modularity. For example, Texas Instruments markets health monitoring AFEs as the ADS1298, AFE4400 and AFE4490. [2] [3] Atmel markets analog front-ends for smart meters. [4] Analog Devices markets a CN0209 product for test and measurement applications. [5]

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Software-defined radio (SDR) is a radio communication system where components that have been traditionally implemented in hardware are instead implemented by means of software on a personal computer or embedded system. While the concept of SDR is not new, the rapidly evolving capabilities of digital electronics render practical many processes which were once only theoretically possible.

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The following outline is provided as an overview of and topical guide to electronics:

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MOSFET applications Wikimedia list article

The metal–oxide–semiconductor field-effect transistor (MOSFET, MOS-FET, or MOS FET), also known as the metal–oxide–silicon transistor (MOS transistor, or MOS), is a type of insulated-gate field-effect transistor (IGFET) that is fabricated by the controlled oxidation of a semiconductor, typically silicon. The voltage of the covered gate determines the electrical conductivity of the device; this ability to change conductivity with the amount of applied voltage can be used for amplifying or switching electronic signals. The MOSFET was invented by Egyptian engineer Mohamed M. Atalla and Korean engineer Dawon Kahng at Bell Labs in 1959. It is the basic building block of modern electronics, and the most frequently manufactured device in history, with an estimated total of 13 sextillion (1.3 × 1022) MOSFETs manufactured between 1960 and 2018.

References

  1. Christopher Bowick (February 4, 2008). "What's in an RF Front End?". EE Times. Retrieved October 3, 2013.
  2. Treena Grevatt (August 9, 2012). "Inside TI's ADS1298 analog front end for health monitoring". EE Times. Retrieved October 3, 2013.
  3. "AFE4400: Integrated Analog Front End for Heart Rate Monitors and Low Cost Pulse Oximeters". Product web page. Texas Instruments. Retrieved October 3, 2013.
  4. "Atmel Acquires IDT's Smart Metering Product Line". Product web page. Atmel. Retrieved October 3, 2013.
  5. "CN0209: Fully Programmable Universal Analog Front End for Process Control Applications". Product web page. Analog Devices. Retrieved October 3, 2013.