Title :
A novel mixed analog/digital MAC unit implemented with SC technique suitable for fully programmable narrow-band FIR filter applications
Author :
Duppils, Mattias ; Eklund, Jan-Erik ; Svensson, Christer
Author_Institution :
Dept. of Phys., Linkoping Univ., Sweden
Abstract :
A mixed analog/digital (MAD) multiply-accumulate (MAC) unit, implemented with switched-capacitor (SC) technique is presented. The MAC unit consist of a programmable capacitor array (PCA) for coefficient representation, and an integrator for accumulation. A coefficient compensation technique to neutralize the non-ideal MAC properties due to finite opamp gain is introduced. The MAD-MAC unit is a new concept for effective mapping of signal processing tasks on SC technique; in particular high-order fully programmable narrow-band FIR filter applications. The utilization of the MAD-MAC unit concept is shown with a simulation of a decimated 400-tap narrow-band FIR filter
Keywords :
FIR filters; circuit simulation; digital-analogue conversion; error compensation; mixed analogue-digital integrated circuits; multiplying circuits; switched capacitor filters; thermal noise; MAD-MAC unit; SC technique; coefficient compensation; coefficient representation; finite opamp gain; mapping of signal processing; mixed analog/digital MAC unit; multiply-accumulate unit; programmable capacitor array; programmable narrow-band FIR filter; simulation; switched-capacitor technique; Band pass filters; Circuits; Complexity theory; Delay; Finite impulse response filter; Flow graphs; Frequency; Narrowband; Nonlinear filters; Physics;
Conference_Titel :
Electronics, Circuits and Systems, 1999. Proceedings of ICECS '99. The 6th IEEE International Conference on
Conference_Location :
Pafos
Print_ISBN :
0-7803-5682-9
DOI :
10.1109/ICECS.1999.814384
