U4468B - ATMEL Corporation

U4468B Quasi-split Sound Circuit and AM Demodulator IC

The U4468B is an integrated bipolar circuit for full multistandard sound IF signal processing in TV/VTR and multimedia applications. It supplies AM signals as well as FM/NICAM sound IF signals and thus allows the design of a universal sound IF module for various applications. Quasi-split Sound Circuit and AM Demodulator IC U4468B Figure 1. Block Diagram V.

Features

• 5-V Supply Voltage
• Gain-controlled 3-stage Wide-band IF Amplifier
• Active Carrier Generation by FPLL Principle (Frequency-Phase-Locked-Loop) for True Quadrature Demodulation
• Complete Alignment-free AM Demodulator
• Switchable Amplitude Detector for Gain Control, which Operates as a Peak Detector for FM Sound and as a Mean Level Detector for AM Sound Description The U4468B is an integrated bipolar circuit for full multistandard sound IF signal processing in TV/VTR and multimedia applications. It supplies AM signals as well as FM/NICAM sound IF signals and thus allows the design of a un.