A Single-Supply 84dB DR Audio-Band ADC for Compact Digital Microphones
| Autor: | Seung-Tak Ryu, Sang-Gug Lee, Huy-Binh Le |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Engineering
Electret microphone Preamplifier business.industry Dynamic range Clock rate Electrical engineering Noise (electronics) Electronic Optical and Magnetic Materials law.invention Sampling (signal processing) law Distortion Noise-canceling microphone Electronic engineering Electrical and Electronic Engineering business |
| Zdroj: | IEICE Transactions on Electronics. :130-136 |
| ISSN: | 1745-1353 0916-8524 |
| DOI: | 10.1587/transele.e95.c.130 |
| Popis: | A 20kHz audio-band ADC with a single pair of power and ground pads is implemented for a digital electret microphone. Under the limited power/ground pad condition, the switching noise effect on the signal quality is estimated via post simulations with parasitic models. Performance degradation is minimized by time-domain noise isolation with sufficient time-spacing between the sampling edge and the output transition. The prototype ADC was implemented in a 0.18µm CMOS process. It operates under a minimum supply voltage of 1.6V with total current of 420µA. Operating at 2.56MHz clock frequency, it achieves 84dB dynamic range and a 64dB peak signal-to-(noise+distortion) ratio. The measured power supply rejection at a 100mVpp 217Hz square wave is -72dB. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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