Title :
SeeHear System: A New Implementation
Author :
Cao, Yong ; Mattisson, Sven ; Björk, Christian
Author_Institution :
Dept. of Appl. Electron., Lund Univ., Lund, Sweden
Abstract :
A SeeHear system, based on a custom analog VLSI chip, has been designed, simulated, fabricated and experimentally tested. The design considerations are concentrated on the implementation of the analog delay lines, which are the key building blocks for implementing the binaural-headshadow and pinna-trague models of the SeeHear system. Allpass filter circuits, instead of follower-integrator (lowpass filter) circuits, are employed to implement the delay line, giving a wider bandwidth and ideal analog signal delay within the audio band. The chip, with 11×15 pixels, was fabricated by NORCHIP using a standard 1.2μm N-well CMOS process.
Keywords :
CMOS analogue integrated circuits; VLSI; all-pass filters; biomedical electronics; delay lines; handicapped aids; integrated circuit layout; low-pass filters; N-well CMOS process; NORCHIP; SeeHear system; all-pass filter circuits; analog delay lines; analog signal delay; audio band; binaural-headshadow model; custom analog VLSI chip; follower-integrator circuits; pinna-trague models; size 1.2 mum; Bandwidth; Circuits; Delay lines; Filters; Frequency; Lenses; Photoreceptors; Resistors; Transconductance; Transfer functions;
Conference_Titel :
Solid-State Circuits Conference, 1992. ESSCIRC '92. Eighteenth European
Conference_Location :
Copenhagen
Print_ISBN :
87-984232-0-7
DOI :
10.1109/ESSCIRC.1992.5468248
