Title :
A Low-Voltage Ultra-Low-Power Current-Companding Integrator for Audio Filter Applications
Author :
Serdijn, Wouter A. ; Broest, Martijn ; Mulder, Jan ; van der Woerd, Albert C. ; Van Roermund, Arthur H M
Author_Institution :
Delft University of Technology, Faculty of Electrical Engineering/DIMES, Mekelweg 4, 2628 CD Delft, The Netherlands, phone: +31-15-2781579, fax: +31-15-2785922, email: W.A.Serdijn@et.tudelft.nl
Abstract :
In this paper, the design and measurement of a 1-V current-companding integrator and its application in a controllable second-order lowpass filter for hearing instruments is presented. The filter operates at voltages down to 1 V, consumes only 6 ¿A 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.
Keywords :
Auditory system; Bipolar transistors; Capacitors; Differential equations; Distortion measurement; Dynamic range; Filters; Instruments; Transfer functions; Voltage;
Conference_Titel :
Solid-State Circuits Conference, 1996. ESSCIRC '96. Proceedings of the 22nd European
Conference_Location :
Neuchatel, Switzerland
Print_ISBN :
2-86332-197-8
