AMIS-50051

AMIS-50051: Digital Demodulator Wireless Products Data Sheet 1.0 Introduction The AMIS-50051 is a small digital demodulator, specially developed to work with the AMIS-50050 spread spectrum baseband controller. It simplifies the design of the receiver in a direct sequence spread spectrum wireless communication link. 2.0 Key Features 1Mbit/s demodulation (QPSK) PN code tracking output to AMIS-50050 (Please refer to the AMIS-50050 spread spectrum baseband controller.) Fully programmable CMOS technology Power-down mode 3.0 Applications Wireless local area networks Portable wireless communication Digital cellular telephones Wireless ISDN modems The AMIS-50051 simplifies the design of the receiver in a direct sequence spread spectrum wireless communication link. The AMIS50051 uses advanced DSP technology to demodulate the data from a BPSK/DBPSK/QPSK/DQPSK modulated signal. This technique also provides a PN code tracking signal output, a carrier tracking signal and an automatic gain control (AGC) output signal. The power of the AMIS-50051 reduces the complexity and component count of a DSSS receiver. The AMIS-50051 is designed to demodulate QPSK or BPSK data from a carrier whose frequency is11MHz or less. Data rates can be as high as 1Mbit/s for QPSK signals or 500Kbit/s for BPSK signals. An error signal is produced, which can be used to acquire and track the PN code of a direct sequence spread spectrum system. This output is a voltage, which the AMIS-50050 (p...