Invention Grant
US08131241B2 Linear voltage controlled variable attenuator with linear DB/V gain slope
有权
具有线性DB / V增益斜率的线性电压控制可变衰减器
- Patent Title: Linear voltage controlled variable attenuator with linear DB/V gain slope
- Patent Title (中): 具有线性DB / V增益斜率的线性电压控制可变衰减器
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Application No.: US12366336Application Date: 2009-02-05
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Publication No.: US08131241B2Publication Date: 2012-03-06
- Inventor: Daniel P. McCarthy , Lawrence E. Connell , Neal W. Hollenbeck
- Applicant: Daniel P. McCarthy , Lawrence E. Connell , Neal W. Hollenbeck
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Agency: Lempia Summerfield Katz LLC
- Main IPC: H04B1/06
- IPC: H04B1/06 ; H04B7/00 ; H03L5/00
Abstract:
A variable attenuator and method of attenuating a signal is presented. The variable attenuator contains an input that receives an input signal to be attenuated. A voltage divider between a resistor and parallel MOSFETs provides the attenuated input signal. The MOSFETs have different sizes and have gates that are connected to a control signal through different resistances such that the larger the MOSFET, the larger the resistance. The control signal is dependent on the output of the attenuator. The arrangement extends the linearity of the attenuation over a wide voltage range of the control signal and decreases the intermodulation distortion of the attenuator.
Public/Granted literature
- US20090143036A1 LINEAR VOLTAGE CONTROLLED VARIABLE ATTENUATOR WITH LINEAR DB/V GAIN SLOPE Public/Granted day:2009-06-04
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