Latest Amplifiers Articles and Videos

Pre-emphasis and de-emphasis boost noise performance in FM, but only up to a point—push the gain too far and you risk…

Pre-emphasis and de-emphasis boost noise performance in FM, but only up to a point—push the gain too far and you risk overmodulation.

Simple first-order pre-emphasis and de-emphasis filters can boost FM receiver SNR by more than 13 dB by exploiting the…

Simple first-order pre-emphasis and de-emphasis filters can boost FM receiver SNR by more than 13 dB by exploiting the spectral differences between signal and noise.

This project brief describes how to build a compact, single-supply preamplifier module that converts the output of an…

This project brief describes how to build a compact, single-supply preamplifier module that converts the output of an electret microphone into a usable line-level audio signal.

Working through examples shows how the threshold effect reshapes FM design choices. See how ignoring it can undershoot…

Working through examples shows how the threshold effect reshapes FM design choices. See how ignoring it can undershoot the required carrier power by over 5x for the same target SNR.

New chip weds advanced technology from Nuvoton and Klippel to create a high-performance audio solution for smart audio devices

New chip weds advanced technology from Nuvoton and Klippel to create a high-performance audio solution for smart audio devices

The ATS296X series from Actions Technology combines Ceva's High Data Throughput radio IP with Actions' own dual-RF…

The ATS296X series from Actions Technology combines Ceva's High Data Throughput radio IP with Actions' own dual-RF design, targeting links of roughly 7.5 Mbps.

Texas Instruments combined JFET inputs with a bipolar output stage in 1977—and it slowly took over guitar pedals,…

Texas Instruments combined JFET inputs with a bipolar output stage in 1977—and it slowly took over guitar pedals, synthesizers, and mixing desks.

Learn how to construct a robust DMOS-based board featuring mute and standby controls. It easily drives 4 or 8 Ω loads…

Learn how to construct a robust DMOS-based board featuring mute and standby controls. It easily drives 4 or 8 Ω loads for your next custom stereo or speaker project.

Safely drive up to ±500 mA into reactive loads. This compact module employs the LT1970A and offers independent 1%…

Safely drive up to ±500 mA into reactive loads. This compact module employs the LT1970A and offers independent 1% source/sink thresholds and onboard fault diagnostics.

Bob Yannes built a three-voice analog synthesizer onto one die in 1982, and its imperfect filter became the signature…

Bob Yannes built a three-voice analog synthesizer onto one die in 1982, and its imperfect filter became the signature sound of an era.

This project brief describes how to build a compact dual-channel power amplifier module that delivers 38 W per channel…

This project brief describes how to build a compact dual-channel power amplifier module that delivers 38 W per channel into 4-ohm speakers using STMicroelectronics' STA540 audio amplifier IC.

Signetics packed a VCO and phase detector into one 14-pin part, turning a daunting feedback technique into something an…

Signetics packed a VCO and phase detector into one 14-pin part, turning a daunting feedback technique into something an ordinary engineer could build.

Build an ultra-low-noise preamplifier with a JFE150 JFET and OPA202 op-amp, perfect for high-impedance sensors,…

Build an ultra-low-noise preamplifier with a JFE150 JFET and OPA202 op-amp, perfect for high-impedance sensors, hydrophones, guitar pickups, microphones, and turntables.

Using a graphical approach, we show that coherent SSB demodulation leaves the input and output SNR unchanged, then…

Using a graphical approach, we show that coherent SSB demodulation leaves the input and output SNR unchanged, then compare its noise performance to DSB-SC and baseband systems.

Visualizing how correlated and uncorrelated signals combine offers an intuitive look at power transformation. See how…

Visualizing how correlated and uncorrelated signals combine offers an intuitive look at power transformation. See how this difference boosts baseband power to double the output SNR.

Learn how to build a constant-bandwidth band-pass filter covering 20 kHz to 60 kHz, with an integrated frequency counter…

Learn how to build a constant-bandwidth band-pass filter covering 20 kHz to 60 kHz, with an integrated frequency counter for precise tuning.

Cirrus Logic introduced nine new 32-bit ADCs, DACs, and codecs for pro and prosumer audio systems with 115 dB dynamic range.

Cirrus Logic introduced nine new 32-bit ADCs, DACs, and codecs for pro and prosumer audio systems with 115 dB dynamic range.

In this article, we'll learn how to calculate the noise power and signal-to-noise ratio (SNR) of a double-sideband…

In this article, we'll learn how to calculate the noise power and signal-to-noise ratio (SNR) of a double-sideband suppressed-carrier communication system.

Developed in the mid-1970s, National Semi’s LM386 collapsed a complete audio output stage into a single DIP-8 package…

Developed in the mid-1970s, National Semi’s LM386 collapsed a complete audio output stage into a single DIP-8 package running off a 9-V battery—and it became the first amplifier most hobbyists ever built.