A Novel Boost Class-D Amplifier Using an H-bridge Circuit
| Autor: | Hiroyuki Akaba, Naoto Shinkawa, Hirotaka Tsuchiya, Yoshino Michitaka, Akira Yasuda |
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| Rok vydání: | 2010 |
| Předmět: |
Engineering
Power supply rejection ratio Switched-mode power supply Current-feedback operational amplifier business.industry Electrical engineering Hardware_PERFORMANCEANDRELIABILITY Fully differential amplifier law.invention Hardware_GENERAL law Boost converter Hardware_INTEGRATEDCIRCUITS Electronic engineering Operational amplifier Linear amplifier Electrical and Electronic Engineering business Direct-coupled amplifier |
| Zdroj: | IEEJ Transactions on Electrical and Electronic Engineering. 5:660-663 |
| ISSN: | 1931-4973 |
| DOI: | 10.1002/tee.20589 |
| Popis: | A novel class-D amplifier with a boost mode is proposed. It solves a problem that cannot boost the signal over a power supply voltage when a certain power supply given. The proposed amplifier can output higher voltages than the power supply voltage. Since the boost DC-DC converter circuit and the class-D amplifier utilize similar switching circuits, the boost DC-DC function is implemented within the class-D amplifier circuit. The half-bridge circuit utilized in a conventional class-D amplifier is replaced with an H-bridge circuit. The simulation results show that the output voltage swing is twice that of the power supply voltage without an external boost DC-DC converter. The signal-to-noise ratio and third-harmonic distortion are 103.5 dB and 0.0058%, respectively. |
| Databáze: | OpenAIRE |
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