BA7230LS Rohm, BA7230LS Datasheet
BA7230LS
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BA7230LS Summary of contents
Page 1
... NTSC color TV signal encoder BA7230LS The BA7230LS comprises an RGB signal matrix circuit, balanced modulator circuit (rectangular 2-phase modula- tion), oscillator circuit (VCXO) for a 3.58MHz subcarrier synchronized with video input burst signals, luminosity and color difference signal mixing circuit, and a high speed switch for selecting composite signals of video input and RGB input ...
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... V B Video input level 3.2V 2.2V 500 V CC 5.6k BA7230LS 1V 3. 6.8k 4.3k 11k 6. Fig. 1 Limits 7 500 – – 125 Limits Unit 4 0 0 0 1.0 V P-P BA7230LS 22 10k 15k 21 10k CLAMP 20 500 GND 19 18 10k Unit ...
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... VIDEO — 2.5 — deg VIDEO — 7.5 — 0.9 2.0 2 0.5 1.1 1 BA7230LS Conditions — P-P — P-P P-P = 0.7V P-P = 0. P-P — — = 1.8k = 0.7V P-P = 0.3V IN P-P = 0.2V IN P-P — — P-P , 2.8 S P-P ...
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... Multimedia ICs • Measurement circuit ~ 1.8k PCP VIDEO 20 1V P-P 10 BFP 0.7V P SYNC CLAMP 19 6dB Y OUT MATRIX BA7230LS MOD MOD + 6dB 11 – 5dB 2.7k BG VCXO 560 TC 68pF 82pF X'TAL HDP 820 Oscilloscope Fig. 2 BA7230LS 0.047 10k S6 0.047 Vector scope 75 ...
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... CLAMP 6dB MATRIX BA7230LS MOD MOD – 5dB + VCXO HDP R 14 – 5dB TC 1 560 0dB 1. 68pF X'TAL Fig. 3 BA7230LS (5V GND Y 16 OUT DLY (400ns) TRP (3.58M) RGB Video DLY 6dB APS PHASE ADJ 0.047 F 2. 0.047 F COMPOSITE OUT R 82pF 6 ...
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... TC 1 20pF XT 3.58MHz Fig. 7 (5) During superimposition, video input can be lowered Carrier by about 5dB using an HDP (half-down pulse), darken- color signal ing the background and making RGB input easier to see. BA7230LS (to which a horizontal syn – cos2 fst 1.14 Y sin2 fst RGB ...
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... Fig. 9 3580 3579.545kHz 0 3580.0 3579.5 3579.0 3578 POWER SUPPLY VOLTAGE: V (V) CC Fig. 11 VCXO free-run frequency vs. power supply voltage BA7230LS 1V P-P TTL LEVEL ( 1) TTL LEVEL ( 1) TTL LEVEL ( 1) 0.7V P-P TTL LEVEL ( 1) TTL LEVEL ( 2) 2V P 3579.545kHz 0.1V IN P-P 600 ...
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... For this reason, we recom- mend adding the circuit in Fig lower the input impedance. Adding this cir- cuit can also reduce carrier leakage. 2.8 0.2 + 0.1 0.3 – 0.05 2.54 0.25 BA7230LS LPF 0.5MHz 1.2mH and pin 5 IN 1.2mH L R ...