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.
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.
Worked examples quantify just how much the FMFB loop shrinks noise bandwidth. We also show how the PLL demodulator offers…
Worked examples quantify just how much the FMFB loop shrinks noise bandwidth. We also show how the PLL demodulator offers a simpler alternative for reducing threshold.
The new mic offers an 84-dBA signal-to-noise ratio and a 146-dB acoustic overload point—a 10-dB improvement over the…
The new mic offers an 84-dBA signal-to-noise ratio and a 146-dB acoustic overload point—a 10-dB improvement over the industry standard.
While feedback lowers the FM detection threshold, it offers no noise advantage over conventional receivers when the…
While feedback lowers the FM detection threshold, it offers no noise advantage over conventional receivers when the carrier power is strong. Discover why in this discussion and mathematical analysis.
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.
Analog Devices Inc. AD4083 Low Power Analog-To-Digital Converters are high-speed, 16-bit SAR converters designed for…
Analog Devices Inc. AD4083 Low Power Analog-To-Digital Converters are high-speed, 16-bit SAR converters designed for precision signal acquisition in demanding applications. Watch and learn all about their features, specs, applications, and more!
By closing a feedback loop around the demodulator, the FMFB architecture narrows the noise bandwidth and lowers the FM…
By closing a feedback loop around the demodulator, the FMFB architecture narrows the noise bandwidth and lowers the FM threshold, without improving SNR at high CNR.
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.
The standard FM SNR equation breaks down once the carrier-to-noise ratio drops below a critical threshold, revealing a…
The standard FM SNR equation breaks down once the carrier-to-noise ratio drops below a critical threshold, revealing a hard limit on trading bandwidth for noise performance.
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.
Deriving a general signal-to-noise expression for frequency modulation with any message signal reveals a core trade-off:…
Deriving a general signal-to-noise expression for frequency modulation with any message signal reveals a core trade-off: more deviation buys better noise performance, but only by using more bandwidth.
The compact system footprint and streamlined integration may help automakers adapt to shifting radio policies.
The compact system footprint and streamlined integration may help automakers adapt to shifting radio policies.
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.
This article explores how combining signal and noise power reveals how the FM system’s output SNR scales with carrier…
This article explores how combining signal and noise power reveals how the FM system’s output SNR scales with carrier amplitude and modulation index.
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.
Explore how frequency-modulated waves resist interference. We break down the demodulator architecture and derive the…
Explore how frequency-modulated waves resist interference. We break down the demodulator architecture and derive the exact output signal power for a sinusoidal message.
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