Introduction to the application circuit of LH3565 color decoding circuit

LH3565 is a single-chip PAL color decoding integrated circuit, which can directly output R, G, B signals, and can control brightness, contrast and color saturation. The application example is shown in the figure.

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The application principle of LH3565 is: the video signal output is sent to the circuit after 6.5MHZ notch, and the signal is divided into two paths: a routing capacitor passes the chrominance signal

LH3565 Typical Application Circuit Diagram

LH3565 voltage value of each foot during normal operation

An ADSL filter separates the analogue voice-frequency signals from the ADSL (broadband) data signals(Broadband being defined as data transfer greater than 128KBPS.)

If ADSL filter/splitters are not used, the ADSL data signals are heard as "noise" on any equipment connected to the "normal" telephone-line. Apart from being annoying during a telephone conversation, there is the possibility that the additional ADSL signals may cause problems with alarm-units (etc) that may be connected across the line.

This ADSL-interference is illustrated in the diagram below that shows how the unfiltered ADSL data signals appear across the "standard" telephone equipment.

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