A digitally generated exponential function for dB-linear CMOS variable gain amplifiers. Ravindran, A., Vidal, E., & Ismail, M. In International Conference on Digital Signal Processing, DSP, volume 1, 2002.
abstract   bibtex   
© 2002 IEEE. The generation of an exponential function is required to attain a high dynamic control range and a dB-linear operation in AGC applications. In such applications usually a DSP is an inherent part of the control loop. In this brief, a simple way of synthesizing the exponential function in analog domain by using a DSP to directly generate the exponential curve values is presented. For a 10-bit implementation, an accuracy of more than 0.05% and a dynamic range of 60dB are obtained. An algorithm required for the generation of the exponential and a possible implementation are discussed. Simulation results of a 0.5 μm CMOS implementation show the validity of the proposed approach.
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 title = {A digitally generated exponential function for dB-linear CMOS variable gain amplifiers},
 type = {inProceedings},
 year = {2002},
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 abstract = {© 2002 IEEE. The generation of an exponential function is required to attain a high dynamic control range and a dB-linear operation in AGC applications. In such applications usually a DSP is an inherent part of the control loop. In this brief, a simple way of synthesizing the exponential function in analog domain by using a DSP to directly generate the exponential curve values is presented. For a 10-bit implementation, an accuracy of more than 0.05% and a dynamic range of 60dB are obtained. An algorithm required for the generation of the exponential and a possible implementation are discussed. Simulation results of a 0.5 μm CMOS implementation show the validity of the proposed approach.},
 bibtype = {inProceedings},
 author = {Ravindran, A. and Vidal, E. and Ismail, M.},
 booktitle = {International Conference on Digital Signal Processing, DSP}
}

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