Invention Grant
US07162029B2 Gain or input volume controller and method utilizing a modified R2R ladder network 失效
增益或输入音量控制器和使用修改的R2R梯形网络的方法

Gain or input volume controller and method utilizing a modified R2R ladder network
Abstract:
A gain or input volume controller and method includes a modified R2R ladder network having a number of R2R branches, switches coupled respectively to the R2R branches, and a switch controller for respectively controlling the switches to control and provide an overall gain value for a signal. The switch controller further includes a mapper for mapping a gain control signal to the switches wherein the gain control signal respectively activates or deactivates the switches. A fine gain control stage provides a fine gain control of the overall gain value. A coarse gain control stage is coupled to the fine gain control stage. The coarse gain control stage includes the modified R2R ladder network and provides a coarse gain control of the overall gain value.
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