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LM1204 データシート(PDF) 8 Page - National Semiconductor (TI) |
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LM1204 データシート(HTML) 8 Page - National Semiconductor (TI) |
8 / 20 page InputOutput Stages (Continued) g HHV Sync Input TLH11238 – 7 Video Input Stage TLH11238 – 8 Pin Descriptions VCC (Pins 2 4 6 19 All VCC pins must be externally wired together For stable operation each supply pin should be 31 36 41 44) bypassed with a 001 mF and a 01 mF capacitor connected as close to the pin as is possible Contrast Cap (Pins 1 3) An external decoupling capacitor of value 01 mF should be connected between pins 1 and 3 for contrast control R Clamp Cap (Pin 5) A 0022 mFto0 1 mF capacitor should be connected from this pin to ground This capacitor allows clamping of the red channel video signal to the reference black level B Clamp Cap (Pin 10) A 0022 mFto0 1 mF capacitor should be connected from this pin to ground This capacitor allows clamping of the blue channel video signal to the reference black level G Clamp Cap (Pin 14) A 0022 mFto0 1 mF capacitor should be connected from this pin to ground This capacitor allows clamping of the green channel video signal to the reference black level R Video In (Pin 7) This is the input for the red channel video signal the signal should be AC coupled to the input through a10 mF capacitor B Video In (Pin 11) This is the input for the blue channel video signal the signal should be AC coupled to the input through a 10 mF capacitor G Video In (Pin 17) This is the input for the green channel video signal the signal should be AC coupled to the input through a 10 mF capacitor R D Gain (Pin 9) This is the gain adjustment pin for the red video channel A 0V to 4VDC voltage is applied to this pin to vary the gain of the red channel Usually the red channel is set for maximum gain and the gains of the blue and green channels are reduced relative to the red channel until white balance is achieved on the CRT screen B D Gain (Pin 13) This is the gain adjustment pin for the blue video channel A 0V to 4 VDC voltage is applied to this pin to vary the gain of the blue channel G D Gain (Pin 15) This is the gain adjustment pin for the green video channel A 0V to 4 VDC voltage is applied to this pin to vary the gain of the green channel Compose Video Input This is the sync separator input pin For Sync on Green systems the green channel video signal (Pin 18) should be AC coupled to pin 18 through a 01 mF capacitor Brightness Control If the LM1204 is used without blanking then this pin should be biased at 20 VDC Brightness control (Pin 20) for all three video channels is now controlled by pin 43 (blank level adjust pin) See Figure 4 Ifthe LM1204 is used with blanking then this pin allows the user to simultaneously DC offset the video portion of the output signals of all three channels thus allowing brightness control (See Figure 5 ) Contrast Control This pin simultaneously controls the gain of all three video channels A 0V to 4 VDC input voltage is (Pin 21) applied to this pin with 0V corresponding to minimum gain (ie maximum attenuation of video signal) and 4V corresponding to maximum gain (ie minimum attenuation of the video signal) 8 |
同様の部品番号 - LM1204 |
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同様の説明 - LM1204 |
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