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11 Myths About MRAM
Spin-torque magnetoresistive random access memory is emerging as the most promising of the next-generation memory technologies. MRAM does have its own peculiarities, though. Let’s examine some of the most common misconceptions or myths about MRAM...
Implementing finite state machines in embedded systems
A finite state machine is one of the most popular design patterns in embedded systems. Many applications from simple home appliances to complex communication systems implement event based state machines...
Using ESD Diodes as Voltage Clamps
When external overvoltage conditions are applied to an amplifier, ESD diodes are the last line of defense between your amplifier and electrical over stress. With proper understanding of how an ESD cell is implemented in a device, a designer can greatly extend the survival range of an amplifier with the appropriate circuit design...
Teardown: Drone streams live video
Back in May 2016, EDN published my teardown of Cheerson's $10 CX-10 quadrotor drone. More recently, you saw my dissection and analysis of its $15 CX-10C sibling, with an integrated still and video camera that captured images to a memory card inserted in the drone's microSD slot. And now it's time for the ~$20 CX-10W...
Project Diana bounces radio waves off moon, January 10, 1946
The US Army Signal Corps made the first attempt to "touch" another celestial body when on January 10, 1946, it bounced radio signals off the moon and received the reflected signals. Dubbed "Project Diana" for the Roman moon goddess, the effort led to what is today known as EME (Earth-Moon-Earth) communications, used for ham radio...
The basics of Bluetooth Low Energy
Bluetooth technology has revolutionized wireless communications between devices with its ubiquitous and simple characteristics. It allows devices to communicate without cables while maintaining high levels of security. Because of its low power and low cost, Bluetooth has played a pivotal role in the evolution of applications from high-speed automotive devices to complex medical devices...
Increase Output Voltage With A Voltage Multiplier
Applications such as printers, laser-based fiber optic systems, and charged-particle air filtration systems require hundreds or even thousands of volts at low power. Flyback converters and autotransformer boosts are reasonable topology choices, but require custom transformers and require less-than-desirable high-voltage components...
Accurate and integrated temperature measurement
Most electronic engineers know that a transistor's base-emitter voltage has a temperature coefficient of about –2 mV/°C. However, for precision temperature sensors, "about" isn't good enough. A number of ingenious designs have capitalized on the basic relationship in ways that guarantee accuracy...
Retro ICs that Will Never Die
From the 555 timer to the LM317 regulator, many old-time components still can be had from suppliers to help engineers, hobbyists, or even college students complete their projects...
Power supplies go digital
Digital control inside an on-board power supply facilitates improved efficiency, reduced total cost and advanced system power management. The following is from an Ericsson white paper and is very relevant to Digital Power...
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