Recent blog posts
  • Behind the Wheel
    • Dec 4, 2018

    Designing daytime running lights, part 1: adding one-fail-all-fail LED fault detection

    Daytime running lights (DRLs) are becoming more popular in vehicles and are even a requirement in some countries. As I’m sure you can guess, DRLs are on during the day, which requires them to be very bright. As a designer, you typically have two choices to achieve the desired DRL LED brightness: Increase the number of LEDs in your string...
  • Industrial Strength
    • Dec 4, 2018

    Covering wide analog input measurement for grid protection and control using 24-bit delta-sigma ADCs

    In my two previous blog posts on improving data acquisition (DAQ) for grid protection and control, I discussed the need for interfacing multiple analog-to-digital converters (ADCs) to a single processor and using the programmable real-time unit subsystem and industrial communication subsystem (PRU-ICSS) to improve sensor DAQ performance . In this post...
  • Power House
    • Dec 4, 2018

    How to use a voltage reference as a voltage regulator

    A version of this post was also published on Electronic Design . Have you ever needed to bias a low-current load and simply didn’t want to add another voltage regulator? Or been in a situation where you need a reasonable level of voltage accurac...
  • Industrial Strength
    • Dec 3, 2018

    Using smart relay drivers for smart meters, part 1

    Utilities deploy an estimated 100 million smart electricity meters around the world annually. The ability to monitor live power consumption and remotely provide or disconnect electric service to customers is a foundational feature for a smart electricity meter. Utility operators need to remotely connect or disconnect electric service for several...
  • Analog Wire
    • Dec 3, 2018

    Small, high-density precision DACs improve performance in laser-drive applications

    In laser-drive applications, a major design consideration facing engineers today is implementing higher channel counts in fixed form factors. In this post, I will explore the benefits of using flexible and precise current sources at high channel coun...
  • アナログ
    • Dec 3, 2018

    超音波センサはどこに使われているのか?

    超音波センサは、乗用車の超音波パークアシストのようなアプリケーションに長年利用されてきました。これは、車両の駐車の際に低速における物体検出を支援するものです。現在は、その他にもキック・ツー・オープン・リフトゲートと侵入検知アラームという2つの新たな超音波センサ・アプリケーションが登場しています(図1を参照)。この記事では、これら3つのアプリケーションで超音波センサが使われる理由とその仕組みについて説明します。 図1:乗用車に搭載されている超音波センサ 超音波パークアシスト超音波パークアシストは...
  • Behind the Wheel
    • Nov 29, 2018

    Top trends driving the automotive industry in 2019

    As we look ahead to 2019, it’s exciting to reflect on this decade as being on the precipice of the biggest evolution in cars since their inception more than a century ago. As autonomous and electric vehicles continue to gain traction, cars in t...
  • Industrial Strength
    • Nov 29, 2018

    An open-and-shut case, part 2: advantages of inductive-based case tamper detection in smart meters

    In the first installment of this series, I discussed some of the limitations of mechanical tamper detection for smart meters and introduced a new inductive-based implementation using the LDC0851 . In this installment, I will discuss the advantages of this implementation. First, the solid-state switching of the LDC0851 eliminates the mechanical failures...
  • アナログ
    • Nov 28, 2018

    任意波形ジェネレータの高電圧、 高周波信号生成における歪みを低下させる方法

    毎日のように新しい技術が出現するなかで、より高速な高電圧信号の生成の必要性はますます高まっています。また、必要な条件もエンド機器によって頻繁に変化しています。これらのエンド機器は、任意波形ジェネレータ(AWG)や高電��クロック・ジェネレータの速度の向上から、パワー電界効果トランジスタや半導体試験機器の入力の駆動まで、あらゆるものである可能性があります。 高電圧や高電流からの速度増加の要件によって、動作の温度制限を維持しながら高周波正弦波信号に歪みが発生しないようにするには、最終段の出力駆動アンプに非常に大きな圧力がかかります。低抵抗、または大容量の負荷駆動が必要な場合、出力アンプでは高電圧、高周波信号生成がさらに困難になります。高周波で高電圧スイングが必要なアンプは、最大リニア出力電流駆動が制限されることがあります...
  • Industrial Strength
    • Nov 27, 2018

    Bringing the next evolution of machine learning to the edge

    Even if you’re not very familiar with deep learning, you’ve probably heard about it and how it can, among other things, help automate the driving experience, increase manufacturing efficiency and change the consumer shopping experience. Deep learning is the latest evolution of artificial intelligence (AI) and machine learning. Both machine...
  • MSP Low-Power Plays
    • Nov 27, 2018

    With capacitive touch, liquid is no longer kryptonite to keypads

    (Please visit the site to view this video) It’s no secret liquid and electronics don’t mix, and companies today are spending millions of dollars each year to “water proof” their products. Liquid damage can cause a devic...
  • Power House
    • Nov 27, 2018

    Using an RGBW LED driver to elevate LED human-machine interface designs

    Products are becoming very intelligent and connected with each other. Devices such as speakers , TVs, refrigerators, set-top boxes and smoke detectors are no longer objects that just sit there – users can control them remotely or through voice ...
  • Power House
    • Nov 26, 2018

    QFN soldering tips and tricks

    If you’re looking to power a space-constrained, high-power-density, thermally critical application, high-efficiency converters in tiny quad flat no-lead (QFN) packages offer great performance value. But you might ask yourself, when you test and...
  • オートモーティブ
    • Nov 26, 2018

    AR HUDにおける太陽光負荷モデリングの重要性

    現在、拡張現実(AR)ヘッドアップ・ディスプレイ(HUD)の応用例として、パイロットの視線上に重要な情報が豊富に映し出されるジェット戦闘機があげられますが、自動車についても、運転する上で重要な情報を現実世界に重ね合わせるARディスプレイは、運転体験をまったく変えてしまうものです。自動車を取り巻く環境では、基本的な警告音やマークを出す代わりに、運転手の視線上に直接グラフィック表示を映して情報を伝えたり視野内の危険性を特定したりすることで、運転者が速やかに行動を起こせるようになるでしょう。このグラフ...
  • Behind the Wheel
    • Nov 20, 2018

    Create high-resolution adaptive headlights Using DLP technology

    To achieve a glare-free high beam in a headlamp, designers can now turn to pixel-level digital control. Traditionally, a typical automotive headlight beam only illuminates what’s in front of a vehicle to improve visibility for drivers in low-light and poor weather conditions. Low beams illuminate the road a short distance in front of the vehicle...