la7837 Sanyo Semiconductor Corporation, la7837 Datasheet
la7837
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la7837 Summary of contents
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... Ordering number:ENN3313C Overview The LA7837, 7838 are vertical deflection output ICs de- veloped for use in high-grade TVs and displays. The inter- lace and crossover distortion responses, in particular, have been greatly improved, allowing excellent picture quality on large size televisions and high precision interlace mode displays ...
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... LA7837, 7838 ...
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... LA7837, 7838 Interface Circuit LA7837, 7838 Pin Connection Diagram and Block Diagram LA7837, 7838 No.3313–3/9 ...
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... Sample Application Circuits for 14” Color TV LA7837, 7838 Fig 12V CC Fig No.3313–4/9 ...
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... Sample Application Circuits for 14” Display (Retrace Time 300 s) Change VR4 to fixed constant after adjustment For negative polarity pulse. LA7837, 7838 Fig. 3 No.3313–5/9 ...
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... The use of a circuit as shown in Fig.3 will cause pin 6 waveform start wave to become linear, so that stretching is suppressed. The example of circuit application shown in Fig.3 does not use the trigger input circuit (pin 2) and one-shot multivibrator (pin 3) built in the LA7837, 7838 ; the pin 6 sawtooth wave is controlled by the LA7855, 7856 vertical output pulse. ...
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... Pin 6 waveform when using the LA7837, 7838 in a display application circuit (Fig. 3) LA7837, 7838 Fig. 5 Fig. 6 Fig. 7 No.3313–7/9 ...
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... LA7837, 7838 application in a multi-sync system The LA7837, 7838 can also be used in a vertical frequency multi-sync system. The LA7837, 7838 do not have an on-chip vertical oscillation circuit, so they operate merely by impressing a trigger pulse (e. 80Hz) on pin 2. However, there are two problems with using the LA7837, 7838 as are in a multi-sync system. ...
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... Reference For example, when using the LA7837, 7838 on a multi-sync system with 40 to 80Hz vertical frequency, vertical linearity distortion will be less than approximately 4%, if vertical size is always uniform. Therefore, if linearity response of better than 4% is desired, the linearity correnction time constant switching circuit shown is Fig ...