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MSM7583 - pie/4 Shift QPSK MODEM

General 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-cor.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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E2U0036-28-81 ¡ Semiconductor ¡ Semiconductor MSM7583 p/4 Shift QPSK MODEM This version: Aug. 1998 MSM7583 Previous version: Nov. 1996 GENERAL 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. 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.