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Blood oxygen meters, Part 2: IC implementations

November 16, 2018 By Bill Schweber

It is now trivial and non-invasive to measure blood-oxygen saturation SpO2, thanks to LEDs, algorithms, and ICs for pulse oximetry — it’s a very long way from having to draw blood and send it out for assessment. Part 1 of this FAQ discussed the principle of the non-invasive, light-based pulse-oximetry systems for reading blood-oxygen saturation […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: basics, FAQ, maximintegrated

Quartz crystals and oscillators, Part 1: Crystal basics

October 18, 2018 By Bill Schweber

An oscillator or clock function is key to nearly all electronic circuits, and in most (but not all) cases, the heart of this oscillator circuit is a tiny piece of quartz, called the crystal blank or slab. It’s easy and commonplace to think of the crystal as a simple component, but as with most components, […]

Filed Under: Clocks & Timing, FAQ, Featured, Products Tagged With: basics, FAQ, maximintegrated

GPS, Part 2: Implementation

October 15, 2018 By Bill Schweber

Part 1 of this FAQ looked at the basic principles of the GPS system. Part 2 looks at some hardware circuitry used to implement a GPS receiver as well as the unappreciated role that Einstein’s Theory of Special Relativity plays in providing an accurate GPS. Q What are the key elements of a GPS receiver? […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: basics, FAQ, maximintegrated, stmicroelectronicsinc

20 mA current loops, Part 2: Advanced features

September 12, 2018 By Bill Schweber

20 mA current loops

Part 1 of this FAQ looked at the basics of the 20-mA current loop, why it is still used extensively, and its primary attributes. In this part, we’ll look at how the analog current loop is used for digitized signals and at self-powered loops – two developments which have extended its life and viability. Q: […]

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

20-mA current loops, Part 1: Basic functions

September 10, 2018 By Bill Schweber

20-mA current loop

You’ve been given an “easy” assignment: get the low-rate data from a temperature sensor to a control computer located 100 feet (30 m) away, in an industrial setting. After much investigation and assessment, you choose a widely used standard called the 20-mA loop, which has been in use for over 50 years, rather than Wi-Fi, […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: analogdevicesinc, basics, FAQ, maximintegrated, nationalinstrumentsinc, precisiondigitalcorp, texasinstrumentsinc

Active noise cancellation, Part 2: Implementation

August 13, 2018 By Bill Schweber

active noise cancellation

Part 1 of this FAQ looked at the basic concept of active noise cancellation, how it might be implemented in principle using analog circuitry, and the harsh reality of actually providing the ANC function. Part 2 looks at modern ANC systems and how they function, as well as their practical issues. Q: Is ANC using […]

Filed Under: Analog ICs, Applications, Consumer, FAQ, Featured Tagged With: amssemiconductor, analogdevicesinc, basics, cirruslogic, FAQ, maximintegrated, sonycorporation, texasinstrumentsinc

Analog Top Talks in January on EDABoard.com forums

February 2, 2018 By Aimee Kalnoskas

analog

Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. Flyback diode: it has one job, but mine…? – Please have a look at my simple circuit: And here […]

Filed Under: Amplifiers, Analog ICs, Data Converters, Featured, Products Tagged With: edaboard.com, infineon, intersill, keysighttechnologies, maximintegrated, texasinstruments

Top analog threads on EDAboard.com – August

September 4, 2017 By Aimee Kalnoskas

(editor’s note: Intrigued by the problem? Have a question or another solution? Then click the “Read more” link and follow the conversation on EDAboard.com or log in to EDAboard and participate in the analog forum threads.) MOSFET getting very hot  – In this schematic,  the VCC feed with a less than 1 A MOSFET gets […]

Filed Under: Amplifiers, Analog ICs, Clocks & Timing, Featured, Products Tagged With: analogdevicesinc, avago, Cadence, lineartechnology, maximintegrated, texasinstruments

Using the Smith chart for Impedance matching, Part 1

August 22, 2017 By Bill Schweber

In circuit designs spanning low-frequency audio through high-frequency RF, there’s considerable discussion about impedance matching between components or subcircuits, with various tools such as the Smith chart with is used to facilitate the matching. Q: What is impedance matching? A: Impedance matching means that a signal source sees a load impedance which is the complex […]

Filed Under: Featured, Industry Experts Tagged With: basics, FAQ, maximintegrated, nationalinstruments

Analog switch vs. digital switch ICs

August 8, 2017 By Janet Heath

Analog switch integrated chips (ICs), when turned on, will conduct both analog and digital signals from the input pin to the output pin. Digital switches can only accept digital signals and duplicate the logic level on the input pin at the output pin. When the digital switch is turned off, it returns to a default […]

Filed Under: Analog ICs, FAQ, Featured Tagged With: analogdevicesinc, basics, FAQ, integrateddevicetechnology, intersilcorporation, maximintegrated, microchiptechnology, nxp, onsemiconductor, rohmsemiconductor, stmicroelectronicsinc, texasinstruments, vishay

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