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Integrated Pop-Click Noise Suppression EMI Reduction and Short-Circuit Detection
该论文提出了一种集成技术，用于抑制pop-click噪声、降低EMI并检测短路条件。
放大器输出电压4V，pop-click噪声抑制至1mV，EMI满足EN55022 Class-B标准且余量15dB
pop-click噪声抑制EMI降低短路检测放大器开关边沿控制
▸辅助环路与斜坡电路抑制pop-click噪声至1mV
▸开关边沿速率控制使系统满足EN55022 Class-B标准并有15dB余量
▸增强方案无需依赖过流事件即可检测短路条件
Abstract
Circuit techniques that overcome practical noise, re-
liability, and EMI limitations are reported. An auxiliary loop with
ramping circuits suppresses pop-and-click noise to 1 mV for an
amplifier with 4 V-achievable output voltage. Switching edge rate
control enables the system to meet the EN55022 Class-B standard
with a 15 dB margin. An enhanced scheme detects short-circuit
conditions without relying on overlimit current events.