The first part of EEWorld’s two-part “virtual roundtable” discussion on Class D audio considers technical challenges and design trade-offs for engineers using Class D audio technology. Joining us for this virtual roundtable are: Joshua LeMaire (JL), Audio Systems Architect at Analog Devices; Steve Colino (SC), Vice President Strategic Technical Sales with Efficient Power Conversion; and […]
Analog IC Tips
RF/Microwave bandpass filter implementations, Part 3: microstrip, coaxial, and helical filters
Part 2 looked at two types of RF/microwave filters, but there are many more, including ceramic coaxial filters and helical filters. They are discussed in this part. Microstrip filters Microstrip filters are built as a carefully defined pattern on a PC board. There is almost no limit to the filter designs which can be built […]
52-GHz-bandwidth sockets handle Kyocera optical QFN packages
A new high-performance low-profile elastomer socket handles 0.5-mm-pitch QFN packages. The SG25-QFN-2017 socket is designed for a 4×4-mm package size and operates at bandwidths up to 52 GHz with less than 1 dB of insertion loss (GSSG configuration). The contact resistance is typically 20 mΩ/pin. Network analyzer reflection measurements for the G-S-S-G case were taken […]
The single-chip loudspeaker: First fully MEMS-based speakers target earphone apps
What is billed as the world’s first monolithic true MEMS speaker is just one millimeter thick and is said to deliver high fidelity, full-bandwidth sound and low total harmonic distortion (THD) for sealed in-ear personal audio devices, including true wireless stereo (TWS) earbuds. Called Montara by its creator xMEMS Labs in Los Altos, Calif., the […]
RF/Microwave bandpass filter implementations, Part 2: Cavity and comb filters
The well-known and extensively analyzed lumped-element bandpass filter is generally not suitable for the RF/microwave region, but there are many distributed-element, energy-based alternatives. Part 1 of this article established the context for these RF/microwave filters, which operate in the spectrum from several hundred MHz and higher, and increasingly cannot use discrete lumped-circuit elements (RLCs). Instead, […]
RF/Microwave bandpass filter implementations, Part 1: Distributed filters
The well-known and extensively analyzed lumped-element bandpass filter is generally not suitable for the RF/microwave region, but there are many distributed-element, energy-based alternatives. Just say the word “filters,” and for many engineers, the mention of this topic stirs a mix of feelings ranging from fear to relief. Why fear? Because filters as a topic in […]
TCXOs for Silicon Lab ICs target network synchronizer, base station apps
Sunstu Electronics introduces the latest Stratum 3 TCXO specially designed for Silicon Lab ICs. These TCXOs come in small, ceramic SMD package delivered by Tape and Reel. The Stratum 3 clock serves to track input under normal operating conditions, but at a wider range than the Stratum 2. STX478 and STX479 both come in a […]
MLCCs provide 1.0 μF in 01005-in packages
Murata Manufacturing has developed the world’s first multilayer ceramic capacitor with a capacitance value of 1.0μF in the 01005-inch size (0.4×0.2mm), which is increasingly used in a wide range of mobile electronic devices including smartphones. Mass production of the GRM022R60G105M with a rated voltage of 4Vdc has already started and mass production of GRM022R60J105M with a […]
Multi-board EDA software highlights schematic design, FPGA optimization, skew group routing
Zuken announces the CR-8000 2020 release of its advanced 3D multi-board EDA environment. The latest release was developed in close collaboration with Zuken’s global customers in business sectors, including electronics, high tech, automation, automotive, aerospace, and defense. As product complexity increases, these businesses are searching for opportunities to increase design performance and process resilience. Valuable […]
Rudiments of radiated EMI/EMC
Radiated emissions standards are generally more focused on higher-frequency noise sources. At about 30MHz, there is a transition between concern with conducted and radiated emissions. Above that frequency, conducted emissions are not usually a major problem. And below 30MHz, the various interconnects and conductors in most electronic systems are not effective antennas for emitting radiated […]