Title :
An instantaneous and syllabic companding translinear filter
Author :
Mulder, J. ; Serdijn, W.A. ; van der Woerd, A.C. ; van Roermund, A.H.M.
Author_Institution :
Electron. Res. Lab., Delft Univ. of Technol., Netherlands
fDate :
2/1/1998 12:00:00 AM
Abstract :
An inherent characteristic of most translinear (TL) filters is instantaneous companding. The authors describe a distortionless syllabic companding TL filter based on the “analog floating-point technique”. Through the addition of a compensation current to each of the capacitances in the filter, distortion is eliminated. By applying syllabic companding to a TL filter, the input current can be much larger than the quiescent current, thus increasing the dynamic range
Keywords :
Butterworth filters; compensation; continuous time filters; electric distortion; analog floating-point technique; compensation current; distortion elimination; distortionless filter; dynamic range improvement; instantaneous companding translinear filter; syllabic companding translinear filter; Bipolar transistors; Capacitance; Circuits; Dynamic range; Filtering theory; Filters; MOS capacitors; MOSFETs; Nonlinear distortion; Transfer functions;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
