Title :
A low Vt CMOS implementation of an LPLV digital filter core for portable audio applications
Author :
Suvakovic, Dusan ; Salama, C. Andre T
Author_Institution :
Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Toronto Univ., Ont., Canada
fDate :
11/1/2000 12:00:00 AM
Abstract :
A low power 32nd-order digital filter for portable audio applications has been designed and implemented in a single threshold 1-V 0.5-μm CMOS process. The design is full custom, using a combination of conventional CMOS and pass-transistor circuits, optimized for low energy consumption and small area. The filter features up to 16 biquad sections with programmable coefficients and performs fixed-point computations with 16-bit resolution. The measured average energy consumption of 330 pJ per biquad computation indicates that the implementation of complex digital signal processing in a single-threshold low-voltage process is a viable alternative to implementations in multiple threshold processes.
Keywords :
CMOS digital integrated circuits; audio signal processing; digital filters; low-power electronics; 0.5 micron; 330 pJ; CMOS low-threshold circuit; biquad computation; digital signal processing; fixed-point computation; full custom design; low-power low-voltage digital filter; pass-transistor circuit; portable audio; programmable coefficients; single threshold process; CMOS process; Circuits; Design optimization; Digital filters; Digital signal processing; Energy consumption; Energy measurement; Energy resolution; Process design; Signal resolution;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
