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basics

Electrical noise can come from anywhere

January 3, 2021 By Janet Heath

op amp variations

Any unwanted signal that’s combined with the desired signal is called noise. In any circuit, noise can come from anywhere; from external systems as well as from  within a circuit itself. External sources include a number of sources such as power lines, RF transmitters, nearby conductors, ignition systems, or motors that turn on and off […]

Filed Under: Analog ICs, FAQ, Featured, Industry Experts Tagged With: basics, FAQ, fluke

Step-by-Step PCB Soldering tips for newbies

November 17, 2020 By Scott Thornton

soldering

The traditional, older type of solder is a mixture of lead (Pb) and tin (Sn). This type of (60/40 – Pb/Sn) solder melts at 200°C and is typically made up of 60 percent tin and 40 percent lead. However, lead-free solder is desirable today, in terms of avoiding a toxic environment. Lead-free solder is a […]

Filed Under: FAQ, Featured, PCB design Tagged With: basics, FAQ

Magnetic resonance imaging (MRI), Part 1: How it works

November 10, 2020 By Bill Schweber

Magnetic resonance imaging

The modern MRI system is an amazing blend of diverse technologies, based on the realization that a small but critical aspect of the spin of hydrogen nuclei could be leveraged to provide a safe, non-invasive way to see inside a human body. Magnetic resonance imaging (MRI) is an extraordinarily valuable and vital tool for non-invasive […]

Filed Under: Applications, FAQ, Featured, Medical Tagged With: basics, FAQ

Filters, Part 1: Analog, switched, and digital filters

November 4, 2020 By Bill Schweber

Filters are essential functions in most circuits and systems; as frequencies extend into the multi-GHz range, surface acoustic wave (SAW) and bulk acoustic wave (BAW) filters are needed to meet the design objectives. An engineer I worked with (and whose name I have forgotten) once remarked to about electronic filters (and he was serious): “like […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: analogdevicesinc, basics, FAQ, qorvo, texasinstrumentsinc

Signal-channel diversity and fading, Part 1: Space diversity

November 3, 2020 By Bill Schweber

signal-channel diversity

In the engineering context, the phrase “channel diversity” refers to various techniques for getting a signal from point A to point B. The different approaches to diversity can be used individually or in combination. Q: What are the primary types of channel diversity in use? A: There are two primary types: space (spatial), and frequency. […]

Filed Under: Applications, FAQ, Featured, Telecommunications, Wireless Tagged With: basics, FAQ

The RF power amplifier, Part 1: Functions

July 28, 2020 By Bill Schweber

RF power amplifier

In the RF signal chain, the power amplifier (PA) is the active element located between the transmitter signal chain circuitry and the antenna, Figure 1. It is often a single discrete component, one with requirements and parameters which differ from those of much of the transmit chain as well as the receiver circuitry. This FAQ […]

Filed Under: Amplifiers, Analog ICs, FAQ, Featured, Products Tagged With: basics, FAQ, themathworks

Filters, Part 2: SAW and BAW devices for RF

March 26, 2019 By Bill Schweber

Part 1 of this FAQ looked at the basic available electronic filters – analog, switched capacitor, and digital – and briefly reviewed the attributes of each. As the frequencies to be filtered reach to 1 GHz and well beyond, while the selectively needed also became narrower, these filter approaches can no longer support many of […]

Filed Under: Analog ICs, FAQ, Featured, Products Tagged With: apitechnologies, basics, broadcom, FAQ, qorvo, spectrummicrowave, texasinstrumentsinc

MRI, Part 2: Historical development (and lawsuits)

March 18, 2019 By Bill Schweber

The modern MRI system is an amazing blend of diverse technologies, based on the realization that a small but critical aspect of the spin of hydrogen nuclei could be leveraged to provide a safe, non-invasive way to see inside a human body. Part 2 of this FAQ looks at the physics and other advances that […]

Filed Under: FAQ, Featured Tagged With: basics, FAQ

Optical amplifiers, Part 2: Basic implementations

February 25, 2019 By Bill Schweber

Part 1 of this FAQ began an overview into the arcane world of all-optical amplifiers including where and why they are needed. Part 2 will briefly describe the four types and identify the two most commonly used for optical-fiber link signal boosting. Q: How “accurate” will this presentation be? A: Frankly, it will have large-scale […]

Filed Under: Amplifiers, Analog ICs, FAQ, Featured, Products Tagged With: basics, FAQ

Optical amplifiers, Part 1: Applications and considerations

February 20, 2019 By Bill Schweber

optical amplifiers

We can now amplify electronic signals from low frequencies to the multi-GHz range without too much difficulty, but amplifying a stream of photons such as in an optical fiber has a very different meaning and is a challenge with no single or easy solution – but it is being done. Electronic and optics technologies are […]

Filed Under: FAQ, Featured Tagged With: basics, FAQ

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