GENERAL DESCRIPTION

The TDA2546A is a monolithic integrated circuit for quasi-split-sound processing, including 5,5 MHz demodulation, in television receivers.

Features

1st i.f. (V.C.: vision carrier plus S.C.: sound carrier)

• 3-stage gain controlled i.f. amplifier

• A.G.C. circuit

• Reference amplifier and limiter amplifier for vision carrier (V.C.) processing

• Linear multiplier for quadrature demodulation

2nd i.f. (5,5 MHz signal)

• 8-stage limiter amplifier

• Quadrature demodulator

• A.F. amplifier with de-emphasis

• AV switch