Title :
A single-chip 20-channel speech spectrum analyzer using a multiplexed switched-capacitor filter bank
Author :
Kuraishi, Yoshiaki ; Nakayama, Kenji ; Miyadera, Kazuyuki ; Okamura, Toshiyuki
Abstract :
A single-chip speech spectrum analyzer which contains a 20-channel filter bank, a 9-bit-resolution analog-to-digital converter, and a 396-bit buffer memory is described. Several efficient design techniques were used to realize the equivalent 308th-order transfer functions on a single chip monolithic MOS circuit. A new time-division-multiplexed switched-capacitor filter technique is introduced which can easily cancel DC offsets which appear in the multiplexed channel outputs. The LSI was fabricated in 3.5-/spl mu/m CMOS technology, with a 7.0/spl times/6.5 mm/SUP 2/ die size, a power consumption of 150 mW, with a single power supply of +5 V. Experimental results show that designed performance was realized.
Keywords :
CMOS integrated circuits; Spectral analysis; Speech analysis and processing; Switched capacitor networks; Time division multiplexing; spectral analysis; speech analysis and processing; switched capacitor networks; time division multiplexing; Analog-digital conversion; CMOS technology; Channel bank filters; Circuits; Energy consumption; Filter bank; Large scale integration; Spectral analysis; Speech analysis; Transfer functions;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1984.1052252
