Titlebook: Low-Voltage CMOS Log Companding Analog Design; Francisco Serra-Graells,Adoración Rueda,José L. Hu Book 2003 Springer Science+Business Medi

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Mosfet Modeling for Companding,ion is paid to the analytical large signal . model as the main tool for circuit design when implementing the Companding Theory. A specific extraction procedure is also introduced to obtain the required technological parameters either from numerical models or from experimental data.

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Amplification and AGC, are proposed and compared. The optimum strategy is chosen in terms of low-voltage and CMOS technology compatibility. A complete set of very low-voltage basic building blocks is then presented for either fixed, programmable or syllabic full AGC systems. Finally, the validity of the novel CMOS circui

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Pulse Duration Modulation,es all the new basic building blocks used to synthesizing fully integrable pulse duration modulators (PDM). An experimental example is also supplied at the end to verify the validity of the proposed circuit technique.

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Industrial Application: Hearing Aids,ogies for Log amplification, filtering, generation and modulation are used here to implement a hearing-aid-on-chip for an industrial customer. Overall specifications for the application specific integrated circuit (ASIC) are described as well as the design flow for its full-custom implementation. Ad

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Conclusions, circuit techniques at the device level, to the proposed design methodologies for improving system design. Furthermore, future work tasks are also proposed in order to expand this research area in terms of signal processing, technology portability and dynamic range enhancement.

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the “absolute” or the “truly infinite” Spirit, the divine Spirit who does not remain merely infinite or transcendent but posits the finite as its own other, maintaining self-identity in that other and reconciling the finite with itself. All reality is an expression of the absolute Spirit. When take

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