Design of a Gate Driver for a Class-D Audio Output Stage with Break-Before-Make in 130 nm SOI-BCD Technology
In this work, design of a gate driver for class-D audio output stage with break-before-make (BBM) is proposed for high power efficiency and low distortion. The proposed gate driver is optimized in terms of current consumption (average and peak), and avoids any stress of the devices.
This circuit has the following features: Adjustable slope of the voltages at output power pins and Overdrive options of the LDMOS gate-source voltage, to optimize the output power. The proposed gate driver was designed, simulated and layouted in Cadence using TSMC 130 nm SOI technology. The
class-D audio amplifier achieves a total harmonic distortion plus noise (THD + N) at the 8-Ω load less than 0.06%, and a power efficiency of 95%. The final design occupies approximately 1.5 mm2.
Keywords: BREAK-BEFORE-MAKE; CLASS-D AUDIO; GATE DRIVER; OUTPUT STAGE; SOI TECHNOLOGY
Document Type: Research Article
Publication date: 01 December 2016
- The electronic systems that can operate with very low power are of great technological interest. The growing research activity in the field of low power electronics requires a forum for rapid dissemination of important results: Journal of Low Power Electronics (JOLPE) is that international forum which offers scientists and engineers timely, peer-reviewed research in this field.
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