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2. 发明授权

US06774684B2 Circuits and methods for controlling transients during audio device power-up and power-down, and systems using the same 有权
标题翻译：在音频设备上电和掉电期间控制瞬变的电路和方法以及使用该设备的系统
公开(公告)号：US06774684B2
公开(公告)日：2004-08-10
申请号：US09764200
申请日：2001-01-17
申请人： Xiaomin Wu , Joseph Jason Welser , Krishnan Subramaniam
发明人： Xiaomin Wu , Joseph Jason Welser , Krishnan Subramaniam
IPC分类号： H03K406
CPC分类号： H03F3/181 , H03F2203/7236 , H03G3/348
摘要： Circuitry for ramping a voltage across a load 506 includes a charging circuit 500 for charging a capacitor 501 to generate a ramp-up wave form. Circuitry 511 selectively decouples a first driver 510 from load 506 during a ramping up mode and couples first driver 510 to load 506 during a normal operating mode. Ramp up driver 507a is selectively coupled to the load 506 during the ramp-up mode for ramping up the voltage across load 506 in response to the ramp-up wave form generated by charging circuitry 500. A discharge circuit 503d, 514a,b discharges capacitor 501 to generate a power-down wave form. Circuitry 511 selectively decouples a first driver 501 from output load 506 during the ramping down of the voltage across output load 506. A ramp-down driver 507b selectively ramps-down the voltage across output load 506 in response to the ramp-down wave form generated by discharge circuitry 503d, 514a,b.
摘要翻译：用于使负载506上的电压斜升的电路包括用于对电容器501充电以产生斜升波形的充电电路500。电路511在升降模式期间选择性地将第一驱动器510与负载506分离，并且在正常操作模式期间将第一驱动器510耦合到负载506。斜坡上升驱动器507a在斜坡上升模式期间选择性地耦合到负载506，以响应于由充电电路500产生的斜升波形而升高负载506上的电压。放电电路503d，514a，b放电电容器 501产生掉电波形。电路511在跨越输出负载506的电压下降期间选择性地将第一驱动器501与输出负载506分离。斜坡下降驱动器507b响应于产生的斜降波形而选择性地斜升输出负载506两端的电压通过放电电路503d，514a，b。

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