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MSM7582 - pie/4 Shift QPSK MODEM

Description

The MSM7582/7582B are CMOS ICs for the p/4 shift QPSK modem developed for the digital cordless telephone systems.

The devices are designed for Personal and Cell station applications, the MSM7582B is the improved MSM7582 in modulator burst rise-up and fall-down characteristics.

Features

  • Single Power Supply (VDD: 2.7 V to ␣ 3.6 V) (Modulator Block).
  • Built-in Root Nyquist Filter for Baseband Limiting (50% Roll-off).
  • Ramp Bit for Burst Signal Rise-up: MSM7582/1.75 symbols MSM7582B/2.0 symbols.
  • Ramp Bit for Burst Signal Fall-down: MSM7582/2.75 symbols MSM7582B/2.0 symbols.
  • Built-in D/A converters for Analog Output of Quadrature Signal I/Q Components and Power Envelope Output I2 + Q2.
  • Differential I/Q Analog output format.

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Full PDF Text Transcription

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E2U0035-16-X2 ¡ Semiconductor MSM7582/7582B ¡ Semiconductor p/4 Shift QPSK MODEM This version: Jan. 1998 MSM7582/7582B Previous version: Nov. 1996 GENERAL DESCRIPTION The MSM7582/7582B are CMOS ICs for the p/4 shift QPSK modem developed for the digital cordless telephone systems. The devices are designed for Personal and Cell station applications, the MSM7582B is the improved MSM7582 in modulator burst rise-up and fall-down characteristics. FEATURES • Single Power Supply (VDD: 2.7 V to ␣ 3.6 V) (Modulator Block) • Built-in Root Nyquist Filter for Baseband Limiting (50% Roll-off) • Ramp Bit for Burst Signal Rise-up: MSM7582/1.75 symbols MSM7582B/2.0 symbols • Ramp Bit for Burst Signal Fall-down: MSM7582/2.75 symbols MSM7582B/2.
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