Class D amplifiers were first proposed in the 1950s. Why have they only recently been gaining more widespread popularity? The answer involves several factors: There were no switching transistors that met the performance demands of Class D amplifiers until the 1980s. And it was not until the mid-1990s that Class D integrated circuits became available. […]
Amplifiers
Class D amplifiers for high-efficiency switched-mode sound
Sound is an analog or linear phenomenon. Traditional audio amplifiers such as Class A and Class AB operate the amplifying transistors in the linear mode. Class A and AB amplifiers can provide clean sound, but are inefficient, like linear power supplies. Class D amplifiers are similar to switched-mode power supplies and use various pulse modulation […]
High-power speaker amp ICs optimized for advanced instrument clusters
ROHM recently announced the AEC-Q100 qualified 2.8W output Class AB monaural speaker amplifiers the BD783xxEFJ-M series (BD78306EFJ-M, BD78310EFJ-M and BD78326EFJ-M) ideal for instrument clusters – used in vehicles equipped with autonomous driving and ADAS. ROHM developed the BD783xxEFJ-M series for vehicle clusters — requiring various sound outputs at high volume, including warning sounds, turn signals, welcome tones, and voice guidance. […]
Analog Top Talks in December 2019 on EDABoard.com
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. Capacitor as a MOSFET in RC circuit – I have a resistor-capacitor circuit that I fitted with a […]
Analog Top Talks in November 2019 on EDABoard.com
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. NPN having its VBE protected against reverse voltage – The attached circuits provide an 8.3V rail which supplies […]
Analog Top Talks in October 2019 on EDABoard.com
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. Calculate capacitance value from Smith Chart – How do I convert 50.04-j77.16 on a 50 Ohm Smith Chart […]
Software-configurable Analog Front End integrates ADC for industrial process control apps
Analog Devices, Inc.introduced the AD4110-1 Analog Front End with integrated 24-bit ADC for industrial process control systems. AD4110-1 is a universal input AFE with an integrated ADC that allows customers to design a “platform” input module that they can configure for multiple functions. This saves significant R&D cost, reduces time to market and requires less […]
Trans-impedance amp handles 64 Gbaud-based 400G coherent apps
Integrated Device Technology, Inc. (IDT), a wholly-owned subsidiary of Renesas Electronics Corporation,introduced its new GX36x20 64Gbaud linear Trans-Impedance Amplifier (TIA) series, in die form. The GX36x20, along with the Renesas NR5195 photodetector diode, offers a very efficient and high-performance receiver solution for 64 Gbaud-based 400G coherent applications. Attendees at ECOC 2019 can see samples of […]
Analog Top Talks in August 2019 on EDABoard.com
Peer-to-peer, engineer-to-engineer questions and answers from the EDABoard.com engineering community around analog ICs and analog design. Click the “Read more” link and follow the entire conversation and maybe add your two cents by logging in to EDAboard.com. LNA circuit not working – I am trying to simulate an LNA circuit from the book “Design of […]
Passive microwave components, Part 1: isolators and circulators
Basic passive microwave components have a vital role in RF/microwave system design. Despite the apparent simplicity of their functions, their performance is based on electromagnetic theory and Maxwell’s equations for insight into their operating principles and performance. Design for the demands of microwave signals is a very different situation than working at lower frequencies. Although […]
