A New Analog Correlator Circuit for DS-CDMA Wireless Applications
Mostafa A. R. Eltokhy, Boon-Keat Tan, Toshimasa Matsuoka, Kenji Taniguchi · OUKA (Osaka University Knowledge Archive) (Osaka University) · 2003
A new analog correlator circuit is proposed for direct sequence code division multiple access (DS-CDMA) demodulator. The circuit consists of only 16 switches, 4 capacitors and 2 level shifters. Control sequence requires only three clock phases. Simulation with code length of 127 reveals that the proposed circuit has a good ability to cancel off the charge error and dissipates 3.4mW at 128MHz. The circuit had been designed using a 0.6µm CMOS process. The area of 256µm × 245µm is estimated to be 9 times smaller compared to other reported equivalent analog correlators.