A 110dB ternary PWM current-mode audio DAC with monolithic 2Vrms driver

Timothy T. Rueger, B. Duewer, Stephen T. Hodapp, T. Lei, J. Melanson, Brian David Trotter
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引用次数: 14

Abstract

A /spl Delta//spl Sigma/ audio DAC uses a 4b quantizer, ternary PWM encoding, and semidigital current-mode FIRs for 110dB dynamic range over 20kHz. The IC achieves -99dB THD driving a single-ended 2V/sub rms/ signal into a 5k/spl Omega/ load. Die area is 5.98mm/sup 2/ in a 0.35/spl mu/m/3.3V process with a 3/spl mu/m/18V module.
一个110dB三元PWM电流模式音频DAC与单片2Vrms驱动
A /spl Delta//spl Sigma/ audio DAC采用4b量化器,三元PWM编码和半数字电流模式fir,动态范围为110dB,超过20kHz。该IC可实现-99dB的THD,将单端2V/sub rms/信号驱动到5k/spl ω /负载。模具面积为5.98mm/sup 2/,在0.35/spl mu/m/3.3V工艺中使用3/spl mu/m/18V模块。
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