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
- Patent Title: Gain or input volume controller and method utilizing a modified R2R ladder network
- Patent Title (中): 增益或输入音量控制器和使用修改的R2R梯形网络的方法
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Application No.: US10447606Application Date: 2003-05-29
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Publication No.: US07162029B2Publication Date: 2007-01-09
- Inventor: Manoj Soman , Krishnan Subramoniam , Hua Hong , Rajendra Datar , John Laurence Melanson
- Applicant: Manoj Soman , Krishnan Subramoniam , Hua Hong , Rajendra Datar , John Laurence Melanson
- Applicant Address: US TX Austin
- Assignee: Cirrus Logic, Inc.
- Current Assignee: Cirrus Logic, Inc.
- Current Assignee Address: US TX Austin
- Agent Steven Lin, Esq.
- Main IPC: H04M1/00
- IPC: H04M1/00 ; H04M9/00

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.
Public/Granted literature
- US20040240918A1 Gain or input volume controller and method utilizing a modified R2R ladder network Public/Granted day:2004-12-02
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