TBA890

The TBA890 is a silicon monolithic integrated signal processing circuit for monochrome and colour television recetions.The circuit is designed for reveivers equipped with tubes or transistors in the deflection and video output stages.the control stages in the i.f. amplifier and the tuner have to be equipped with n-p-n transistors.The circuit is developed for signals with negative modulation.

Functions of the TBA890 are:(1)video pre-amplifier with emitter-fllower output and short circuit protection;(2)blanking facility for the video amplifier;(3)gated a.g.c. detector supplying the a.g.c. voltage for the vision i.f. amplifier and tuner;(4)noise cancelling circuit in the a.g.c. and sync sparator circuits;(5)sync separator;(6)automatic horizontal phase detector;(7)vertical sync pulse separator.

The ratings of the TBA890 can be summarized as:(1):the parameter is supply voltage,the symbol is Vp,the rating is 20,the unit is V;(2):the parameter is power dissipation,the symbol is ptot,the rating is 700,the unit is mW;(3):the parameter is storage temperature,the symbol is Tstg,the rating is -55 to +125,the unit is ;(4):the parameter is operating temperature,the symbol is Tamb,the rating is -25 to +80,the unit is .