BA7230 Rohm, BA7230 Datasheet
BA7230
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BA7230 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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... BA7230LS 1V 3. 6.8k 4.3k 11k 6. Fig. 1 Symbol Limits V 7 500 Topr – Tstg – 125 Limits Unit 4 10k 15k 21 10k CLAMP 20 500 GND 19 18 10k Unit BA7230LS ...
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... SC f 4.5 6 — MHz V DG — 3.5 — — 2.5 — deg — 7.5 — 0.9 2.0 2 0.5 1.1 1 BA7230LS Conditions — VIDEO P-P — VIDEO P-P VIDEO P 0. 0. P-P — — 1. 0. 0. 0.2V IN ...
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... BA7230LS MOD MOD + + 6dB – 5dB BG PD VCXO 560 TC 68pF 82pF X'TAL HDP Oscilloscope Fig. 2 BA7230LS 0.047 OUT 10k 2.7k 0.047 ...
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... Video DLY 6dB APS PHASE ADJ 0.047 F 2. VCXO + 0.047 F COMPOSITE 1 OUT 1. 82pF ( P OUT C 19 820 10pF 2SC2021 3 BA7230LS ...
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... Time when there is no video input (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 Y' 1 ...
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... CB: COLOR BURST 0. 0. Fig. 9 3580 3579.545kHz 0 3580.0 3579.5 3579.0 3578 POWER SUPPLY VOLTAGE: V Fig. 11 VCXO free-run frequency vs. power supply voltage BA7230LS 1V P TTL LEVEL ( TTL LEVEL ( TTL LEVEL ( 0.7V P TTL LEVEL ( 1) ...
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... For this reason, we recom- mend adding the circuit 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 1.2mH ) and pin have high imped- 1.2mH 2SC2021 1 2 LPF ...