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型號： NTE789

類別： 集成電路

描述： Description: The NTE789, a monolithic silicon integrated circuit, is a stereo multiplex decoder intended for FM multiplex systems. This stereo multiplex decoder requires only one low–inductance tuning coil (requires only one adjustment for complete alignment), provides automatic stereo switching, energizes a stereo indicator lamp, and operates from a wide range of voltage supplies. Figure 1 shows the block diagram for the NTE789. The input signal form the detector is amplified by a low–distortion preamplifier and simultaneously applied to both signal, generated by a local voltage–controlled oscillator (VCO), is counted down by two frequency dividers to a 38kHz signal and to two 19–kHz pilot–tone supplied by the FM detector is compared to the locally generated 19–kHz signal in a synchronous detector. Features: ? Requires the use of only one low–inductance tuning coil ? Automatic stereo switching ? Directly drives a stereo indicator lamp up to 100mA ? Includes driver for stereo–lamp indicator ? Operates from a wide range of power supplies: 10 to 16 volts ? Requires only one adjustment for alignment ? Switching from monaural to stereo and stereo to monaural produces no audible thumps ? Low distortion: under 0.5% ? Separate dc input permits stereo defeat or enable ? High signal output: directly drives audio amplifiers ? Excellent SCA (storecast) rejection: 55dB typ. ? High audio channel separation: 40dB typ.

品牌官網(wǎng)： www.nteinc.com