TDA5940-2

Video and Sound IF with V & S SCART TDA 5940-2 Bipolar IC Features q q q q Features video / sound scart Active FM-PLL demodulator AF control Alignment - free sound IF P-DIP-24-2 Type TDA 5940-2 Ordering Code Q67000-A5144 Package P-DIP-24-2 Functional Description and Application Video IF Section Video IF-broadband amplifier followed by a quasi-synchronous demodulator for negative modulated IF signals. A Full-SCART interface is included in the video section. A separate video output after the demodulator permits the installation of one or more sound traps at the input of the SCART switch. The tuner AGC threshold is set by means of a potentiometer, all other functions can switched with open collector transistors. Sound IF Section FM-IF limiter with FM-PLL demodulator. The AF section has a Full-SCART switch followed by a volume control. The volume is controlled by an analog voltage. Application The TDA 5940-2 is suitable for application in television receivers with Full-SCART. Semiconductor Group 44 06.94 TDA 5940-2 Circuit Description Video IF Section The video IF section incorporates a four-stage, capacitively coupled, symmetrical and controlled amplifier, a limiter with selection and a mixer for quasi-synchronous demodulation of negative modulated IF signals followed by a video output amplifier. The video demodulator output and the SCART-switch input are connected by means of a sound trap. The SCART switch has two inputs (for signals from video demodulator and SCA...