MSM7583 Overview
Description
The MSM7583 is a CMOS IC for the p/4 shift QPSK modem developed for the digital cordless telephone systems. The device, which contains one system of modulator and two systems of demodulater, is optimized for applications for cell stations in a cordless telephone system.
Key Features
- Single +5 V Power Supply: 4.5 V to 5.5 V (Modulator Block)
- Built in Root Nyquist Filter for Baseband Limitting (50% Roll-off)
- Ramp Bit for Burst Signal Rise-up (Fall-down) : 2 Symbols
- Built-in D/A converters for Analog Outputs of Quadrature Signal I/Q Components and I 2 + Q 2 (Analog) Power Envelope Output
- Differential I/Q Analog Output Type
- I/Q Output, DC Offset/Amplitude Adjustable (Demodulator Block)
- Built-in Diversity-corresponding Demodulation Circuit: 2 Systems
- Full Digital p/4 Shift QPSK Demodulation System
- Built-in Clock Recovery: 4 Circuits
- Transmit/Receive Independent Power-down Control capability
