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INTEGRATED CIRCUITS DATA SHEET TDA4560 Colour transient improvement circuit Product specification File under Integrated Circuits, IC02 March 1985 Philips Semiconductors Product specification Colour transient improvement circuit GENERAL DESCRIPTION TDA4560 The TDA4560 is a monolithic integrated circuit for colour transient improvement (CTI) and luminance delay line in gyrator technique in colour television receivers. Features · Colour transient improvement for colour difference signals (R-Y) and (B-Y) with transient detecting-, storage- and switching stages resulting in high transients of colour difference output signals · A luminance signal path (Y) which substitutes the conventional Y-delay coil with an integrated Y-delay line · Switchable delay time from 720 ns to 1035 ns in steps of 45 ns · Output for the option of velocity modulation QUICK REFERENCE DATA Supply voltage (pin 10) Supply current (pin 10) (R-Y) and (B-Y) attenuation (R-Y) and (B-Y) output transient time Adjustable Y-delay time Y-attenuation PACKAGE OUTLINE 18-lead DIL; plastic (SOT102); SOT102-1; 1996 November 27. VP = V10-18 IP = I10 cd ttr td y typ. typ. typ. typ. typ. 12 35 0 150 7 V mA dB ns dB 720 to 1035 ns March 1985 2 Philips Semiconductors Product specification Colour transient improvement circuit TDA4560 March 1985 3 Fig.1 Block diagram. Philips Semiconductors Product specification Colour transient improvement circuit FUNCTIONAL DESCRIPTION TDA4560 The IC consists of two colour difference channels (B-Y) and (R-Y) and a luminance signal path (Y) as shown in Fig.1. Colour difference channels The (B-Y) and (R-Y) colour difference channels consist of a buffer amplifier at the input, a switching stage and an output amplifier. The switching stages, which are controlled by transient detecting stages (differentiators), switch to a value that has been stored at the beginning of the transients. The differentiating stages get their signal direct from the colour difference detecting signal (pins 1 and 2). Two parallel storage stages are incorporated in which the colour difference signals are stored during the transient time of the signal. After a time of about 600 ns they are switched immediately (transient time of 150 ns) to the outputs. The colour difference channels are not attenuated. Y-signal path The Y-signal input (pin 17) is capacitively coupled to an input clamping circuit. Gyrator delay cells provide a maximum delay of 1035 ns including an additional delay of 45 ns via the fine adjustment switch (S1) at pin 13. Three delay cells are switched with two interstage switches dependent on the voltage at pin 15. Thus three switchable delay times of 90 ns, 180 ns or 270 ns less than the maximum delay time are available. A tuning compensation circuit ensures accuracy of delay time despite process tolerances. The Y-signal path has a 7 dB attenuation as a normal Y-delay coil and can replace this completely. The output is fed to pin 12 via a buffer amplifier. An