Unlike better-known electromagnetic motors, the widely used piezoelectric-based motor/actuator provides precise, repeatable linear motion over short distances, and requires a voltage drive rather than a current drive. When we think “motor”, we usually think of rotating motion or perhaps a special “linear motor” which is a rotary motor which has been rolled out flat. To […]
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20-mA current loops, Part 1: Basic functions
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, […]
Super-low-voltage supervisors feature ±0.5% reset threshold accuracy for ASIC, FPGA, DSP, MCU, MPU architectures
Analog Devices announces the Power by Linear LTC2962-LTC2964 family of highly accurate 4-channel voltage supervisors for increased system voltage margin and enhanced reliability. ASIC, FPGA, DSP, MCU and MPU architectures that operate from supplies as low as 1V cannot utilize traditional 1%-2% accurate voltage supervisors without shedding valuable system voltage margin and shrinking the remaining load […]
Optocouplers, Part 2: Parameters and applications
Part 1 of this FAQ explored the basics of the optocoupler. This part looks at key parameters and some application examples. Q: What are the primary factors used when assessing an optocoupler? A: While there are many important factors, there are several which are noteworthy: isolation, current-transfer ratio (CTR), linearity (for analog use), and speed. […]
Step-down ultrathin regulator module handles ASIC, FPGA loads
Analog Devices announces the Power by Linear LTM4686, a dual 10A or single 20A ultrathin step-down µModule regulator with a PMBus interface housed in a 16mm x 11.9mm x 1.82mm LGA package. The 1.82mm package height allows the LTM4686 to be placed on a PC board very close to its load such as an FPGA or […]
Are power systems up to the task of running self-driving cars?
Automotive electronics depends on power supplies that can handle abuse like load dumps. New ICs are optimized for these extreme environments and can meet stringent vehicle safety standards. Tony Armstrong, Analog Devices Inc. THE auto industry expects a transition to autonomous vehicles via both an evolutionary path, where existing cars get there little by little […]
Auto-qualified, high-efficiency, 3.2-MHz synchronous quad output buck regulators feature low EMI
Analog Devices announces the Power by Linear ADP5138, automotive qualified, high efficiency, 3.2MHz synchronous quad output buck regulators, incorporating a unique fixed frequency, peak current mode, PWM control architecture that reduces conducted and radiated emissions. The device’s high efficiency buck regulators improve thermal management, operate down to 0.8V outputs and deliver up to 1A of continuous output […]
Active noise cancellation, Part 2: Implementation
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 […]
Microcontroller Top Talks in July on EDABoard.com forums
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. Problem measuring output impedance of CMOS inverter – Why am I getting negative output impedance using the following test circuit? Read more Flash memory programming for DSPIC33EP256MU806 – I […]
SMPS chips that squelch EMI
We recently filmed a short video with Tony Armstrong from Analog Devices who took us through a demonstration of a new kind of circuitry that cuts down the noise from switching power supplies. Switchers are notoriously noisy but can usually be fixed with filtering. Armstrong illustrates that with a non-synchronous regulator running at about 300 […]