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. Opamp circuit simulation – Is the following open loop transient simulation of an opamp correct? Current excitation for […]
Understanding the difference between an incremental encoder’s PPR, CPR, and LPR
by Jason Kelly, CUI Incremental rotary encoders produce two square wave outputs as they rotate, from which the angular displacement and rotational speed can be calculated. These quadrature outputs let the host system determine the direction of rotation. To calculate speed and angular displacement, the encoder’s resolution – equivalent to the angular displacement represented by […]
Stress & Strain, Part 2: Implications for electronics
The mechanical strain induced on electronic components due to mechanical and thermal stress is an important aspect of their performance consistency and limitations; stress is also used to enable some materials to provide critical electronic functions. Part 1 of this FAQ looked at the basic principles and tests for material strain when stress is applied. […]
A quasi-Wheatstone bridge linear output circuit with one op amp
by Crutschow, Electro-Tech-Online community member A Wheatstone bridge is sometimes used to convert a variable resistance, such as a thermistor or strain-gage, to a voltage with zero volts out at some particular resistance (such as at 0°C for the thermistor). A bridge circuit has the advantage of being able to generate a 0V null output […]
Stress & Strain, Part 1: Fundamental principles
The mechanical strain induced on electronic components due to mechanical and thermal stress is an important aspect of their performance consistency and limitations; stress is also used to enable some materials provide critical electronic functions. Although electronic systems and circuits invoke intangibles such as voltages, currents, power, EM fields, and Maxwell’s equations — to cite […]
Choosing the right MEMS microphone interface for your project
by Bruce Rose, CUI Inc. Micro-electro-mechanical systems (MEMS) microphones have been steadily increasing their market share, driven by the surge in popularity of voice-controlled electronics with applications like voice-enabled navigation devices and digital home assistants. But what are the different types of MEMS microphone electrical interfaces available and how do you apply them to your […]
Analog Top Talks in March 2019 on EDABoard.com
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. Contactless water level sensors – I’m making a water level controller project. So far what I’ve done: – […]
Filters, Part 2: SAW and BAW devices for RF
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 […]
Filters, Part 1: Analog, switched, and digital filters
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 […]
MRI, Part 2: Historical development (and lawsuits)
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 […]
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