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An 0.8- m CMOS Mixed Analog–Digital Integrated Audiometric System
| Content Provider | Semantic Scholar |
|---|---|
| Author | Brigati, S. Francesconi, F. Grassi, Giuseppe Lissoni, D. Malcovati, Piero Maloberti, Franco Nobile, Arthur Poletti, M. |
| Copyright Year | 1999 |
| Abstract | This paper presents a dual-channel fully integrated audiometric system, which generates the complete set of audio and control signals required for exhaustive audiometric tests. The system includes a novel signal generator, based on the direct digital synthesis technique, which fulfills the requirements of advanced audiometric tests. The proposed system faces two different problems, namely, the generation of a finely tunable pure sinewave and the generation of noise signals with a controlled spectrum. To achieve tuning capabilities down to 1 Hz at 20 kHz and 15 Hz at 100 Hz, a fractional division of a 40-MHz master clock based on noise-shaping techniques is performed. Moreover, for noise generation, a novel circuit based on pseudorandom sequences combined with analog switched-capacitor filters is used. The chip is fabricated in a 0.8m CMOS process and occupies a 24.2-mm2 silicon area. It consumes 45 mW from a single 5-V power supply and achieves less than 90-dB crosstalk between the channels. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://ims.unipv.it/~franco/JournalPaper/75.pdf |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Analog Audio Media CMOS CNS disorder Capacitor Device Component Crosstalk Direct digital synthesizer Dual Face Hertz (Hz) Kilohertz Less Than Multi-channel memory architecture Noise shaping Power supply Pseudorandomness Requirement Silicon Switched capacitor |
| Content Type | Text |
| Resource Type | Article |
