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MAX4397 Datasheet(PDF) 14 Page - Maxim Integrated Products |
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MAX4397 Datasheet(HTML) 14 Page - Maxim Integrated Products |
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14 / 30 page  Audio Outputs Both right and left channels have a stereo output for the TV and VCR SCART. The monaural output, which is a mix of the TV right and left channels, drives the RF modulator, RF_MONO_OUT. The monaural mixer, a resistor summer, attenuates the amplitude of each of the two signals by 6dB. A 12.54dB gain block follows the monaural mixer. If the left and right audio channels were completely uncorrelated, then a 9.54dB gain block is used. See Figures 4 and 5 for the functional diagram of the audio section. Clickless Switching The TV channel incorporates a zero-crossing detect (ZCD) circuit that minimizes click noise due to abrupt signal level changes that occur when switching between audio signals at an arbitrary moment. Audio/Video Switch for Dual SCART Connectors 14 ______________________________________________________________________________________ ENC_INL+ AUDIO INPUTS AUDIO OUTPUTS ENC_INL- TV_INL VCR_INL DIFF/SE DIFF/SE MUTE MUTE MUTE Σ/2 MUTE MUTE MUTE MUTE MUTE IS AN INTERNAL SIGNAL -6dB, 0dB, OR +6dB -6dB, 0dB, OR +6dB 9.54dB 9.54dB 12.54dB GNDAUD 9.54dB ZCD TV_OUTL RF_MONO_OUT TV_OUTR VOLUME CONTROL BYPASS VOLUME CONTROL +6dB TO -56dB VOLUME CONTROL +6dB TO -56dB I2C VCR_OUTL VCR_OUTR 9.54dB ENC_INR+ ENC_INR- TV_INR VCR_INR VOLUME CONTROL BYPASS Figure 4. MAX4397D Audio Section Functional Diagram |
Similar Part No. - MAX4397_V01 |
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Similar Description - MAX4397_V01 |
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