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A low-voltage ultra-low-power translinear integrator for audio filter applications

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5 Author(s)
Serdijn, W.A. ; Fac. of Electr. Eng., Delft Univ. of Technol., Netherlands ; Broest, Martijn ; Mulder, J. ; van der Woerd, Albert C.
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In this paper, the design and measurement of a l-V translinear integrator and its application in a controllable second-order lowpass filter for hearing instruments is presented. A semicustom version of the filter has been integrated in a standard 2-μm, 7-GHz, bipolar IC process and operates at voltages down to 1 V, consumes only 6 μA, and has a dynamic range of 57 dB for a total harmonic distortion below 2%. Its cutoff frequency is linearly adjustable in octaves from 1.6 to 8 kHz

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Solid-State Circuits, IEEE Journal of  (Volume:32 ,  Issue: 4 )