LA7425

Ordering number : EN5110 Monolithic Linear IC LA7425 NTSC Format Single-Chip Signal Processing IC for VHS VCR Products Overview The LA7425 is a single-chip video signal processing IC for use in VHS format VCR products. The number of required adjustments has been reduced to a single adjustment by IC chip internal trimming. The incorporation of a playback equalizer and other circuits on chip provides a significant reduction in external components and thus significantly reduces the cost of manufacturing the signal processing printed circuit board. This product can also support simplified S-VHS playback, which is becoming a standard feature in VCR products in the Japanese market. Features Only one adjustment point (comb filter phase adjustment) (The AGC, carrier, deviation and PB-Y level are adjustment free.) (If an LA7411/16 is used as the head amplifier, the Y/C record current will also be adjustment free.) Simplified S-VHS playback support — Built-in S-VHS discrimination circuit — Built-in equalizer switch — Automatic demodulator gain switching — Internal automatic de-emphasis characteristics switching Only a minimal number of external components required (85 components: This corresponds to a 38% reduction over previous Sanyo products ... CNR and SQPB not handled, and REC EQ not included.) Components newly incorporated on chip: — Playback equalizer (include chroma trap), limiter balance filter, capacitor and resistor for detail enhancer, record chroma 7.8 MHz trap, pla...