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PKP Metadata Items |
Metadata for this Document |
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| 1. |
Title |
Title of document |
Class D Audio Amplifier with Trim-able Ramp Generator Design Theory and Design implementation for portable applications |
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| 2. |
Creator |
Author's name, affiliation, country |
Salahddine Krit; Faculté des sciences Dhar El Mehraz Fès
Laboratoire d’Electronique Signaux –Systèmes et Informatique (LESSI); Morocco |
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| 2. |
Creator |
Author's name, affiliation, country |
Hafid Amrani; Faculté des sciences Dhar El Mehraz Fès
Laboratoire d’Electronique Signaux –Systèmes et Informatique (LESSI); Morocco |
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| 2. |
Creator |
Author's name, affiliation, country |
Hassan Qjidaa; Faculté des sciences Dhar El Mehraz Fès
Laboratoire d’Electronique Signaux –Systèmes et Informatique (LESSI); Morocco |
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| 3. |
Subject |
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Subject |
Keyword(s) |
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| 4. |
Description |
Abstract |
This paper presents a single chip class D amplifier with two selectable gains 6dB & 9dB, 1.4 W output power and 86% efficiency with an 8 ohm load. This chip uses a frequencies trim-able ramp generator. Input Clock Frequency Range with 250kHz – 550kHz and 8 bits trim, 4 bits (LSB) to trim the ramp amplitude to vdd/5 peak-to-peak, 4 bits (MSB) to adjust the ramp continuity, the trimming procedures consists on putting a zero input signal, and adjust the trim code such as to get a 50% duty cycle Pulse Wide Modulation output signal, Reduction of inter- modulation in case of mixing of Audio and Voice. It operates with a 2.5 V to 5.5V supply voltage, 0.5 um, double-poly, triple-metal BiCMOS process. It has an area of 1.5 x 1.2 mm2 and it achieves a THD as low as 0.04%, with a flat band response between 20 Hz and 20 kHz. |
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| 5. |
Publisher |
Organizing agency, location |
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Contributor |
Sponsor(s) |
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Date |
(YYYY-MM-DD) |
17-03-2011
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| 8. |
Type |
Status & genre |
Peer-reviewed Article |
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| 8. |
Type |
Type |
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| 9. |
Format |
File format |
PDF |
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| 10. |
Identifier |
Uniform Resource Identifier |
https://revues.imist.ma/index.php/MJCM/article/view/219 |
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| 11. |
Source |
Title; vol., no. (year) |
Moroccan Journal of Condensed Matter; Vol 11, No 1 (2009) |
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| 12. |
Language |
English=en |
en |
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| 13. |
Relation |
Supp. Files |
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Coverage |
Geo-spatial location, chronological period, research sample (gender, age, etc.) |
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Rights |
Copyright and permissions |
Copyright (c)
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