Part 1 of the FAQ began an exploration of the first Philips AED, a very innovative personal defibrillator which completely changed the way, place, operation, user role, and time-to-administer electric-shock resuscitation, as well as the popular thinking and expectations about it. Q: What other challenges did Philips face in delivering the desired BTE waveform? A: […]
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How it Works — the Personal Defibrillator: Medical basics and principles
The personal defibrillator combines sophisticated electronics with precise, adaptive control of the high-energy pulses which can re-start the heart’s beating but do so without shocking the patient to death. You’ve seen those life-saving defibrillators in offices, malls, and even homes, quietly at the ready for immediate use. When the Philips Medical Systems division of Royal […]
Power/energy monitor includes sense resistor to handle ±65 A
The LTC2947-65 is a high precision power and energy monitor with an internal sense resistor supporting up to ±65 A. Three internal No Latency ΔΣ ADCs ensure accurate measurement of voltage and current, while high bandwidth analog multiplication of voltage and current provides accurate power measurement in a wide range of applications. Internal or external […]
Micropower management unit provides three isolated rails
The ADP1031 is a high performance, isolated micropower management unit (PMU) that combines an isolated flyback dc-to-dc regulator, an inverting dc-to-dc regulator, and a buck dc-to-dc regulator, providing three isolated power rails. Additionally, the ADP1031 contains four, high speed, serial peripheral interface (SPI) isolation channels and three general-purpose isolators for channel-to-channel applications where low power […]
DAC carries on-chip reference, SPI interface, gives 14-bit current output
The AD5770R is a 6‑channel, 14‑bit resolution, low noise, programmable current output, digital-to-analog converter (DAC) for photonics control applications. The device incorporates a 1.25 V, on-chip voltage reference, a 2.5 kΩ precision resistor for reference current generation, die temperature, output monitoring functions, a fault alarm, and reset functions. Key Features ► 6-channel, current output DAC […]
Dual, simultaneous sampling, 14‑bit SAR ADC offers differential inputs
The AD7381 is a 14‑bit, pin-compatible, dual simultaneous sampling, high speed, low power, successive approximation register (SAR) analog-to-digital converter (ADC) that operates from a 3.0 V to 3.6 V power supply and features throughput rates up to 4 MSPS. The analog input type is differential, accepts a wide common-mode input voltage, and is sampled and […]
Flyback power converters, Part 2: Enhancements and ICs
Power supplies and converters tend to be simple in principle, yet their actual design – including overcoming the subtle issues which degrade and impede their performance – is the real challenge. In Part 1, we looked at the flyback design and some distinct advantages along with unique idiosyncrasies. This FAQ looks at some of these […]
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 […]
Flyback power converters, Part 1: Basic principles
Among the many available topologies used for power-supply converters, the flyback design offers some distinct advantages along with unique idiosyncrasies. There’s a wide and diverse array of power-supply converter topologies among which to choose, each with tradeoffs in their various performance attributes and cost. The flyback design is a converter approach which has been used […]
Microcontroller Top Talks in March 2019 on EDABoard.com
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around microcontrollers. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. Counting pulses from external source PIC16F877a – I am planning to do a very simple LED fading using atmega328p via Atmel Studio. […]
