The NTE7200 is a monolithic intergrated circuit in an 18-Lead DIP type package designed for use as a stereo transmitter. This device consists of a stereo modulator that creates stereo composite signals, an FM modulator that creates FM signals, and an RF amplifier. The stereo modulator develops composite signals made up of a MAIN (L+R) signal, a SUB (L-R) signal and a pilot (19kHz) signal using 38kHz crystal oscillators.
The FM modulator has carriers on the FM broadcast band (75 to 108MHz). The RF amplifier transmits the stereo encoded FM signals and is also a buffer for the FM modulator. The stereo transmitter is equipped with a constant voltage pin for a variable capacitor that is used to finly adjust the FM frequency.
Overview The LA3370 is a multiplex IC for FM car stereo, and it has the following 2 functions through its utilization of the IF meter output voltage, etc. 1. stereo noise control (SNC) under which the noise particular to the FM stereo unit in the weak electric field is reduced smoothly. 2. High-cut control (HCC) under which the high frequency is smoothly attenuated. In additioin, the LA3370 can be, due to its low distortion factor, an IC for multiplex stereo demodulator which is appropriate for the car component stereo unit.
Features • Low distortion factor. (0.05% typ. 300mV input, mono) • The ripple of power source can effectively be rejected. (35dB typ.) • The range of voltage to be used is wide. (VCC=6.5 to 14V) • The space factor is advantageous because of the single-end package. • The printed circuit board can easily be prepared as 3mm pitch is used between the pins.
Description The U2514B is an integrated bipolar radio suitable for digital tuning systems. It contains a FM front end with pre-amplifier and FM-stereo decoder as well as a complete AM receiver and demodulator. Stop-signal generation is implemented for FM and AM mode. This circuit is designed for use in small radios, power packs and multimedia applications
Features ● FM wideband AGC ● LO-buffer for digital tuning ● Integrated stop signal generation with true AM/ FM discriminators ● Adjustable stop signal sensitivity ● Automatic stereo-mono-blend ● High cut ● Mute function ● Pilot canceller ● Supply voltage range 3 to 12 V ● Package: SSO28