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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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TDA7403 датащи(PDF) 13 Page - STMicroelectronics |
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TDA7403 датащи(HTML) 13 Page - STMicroelectronics |
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13 / 26 page  65mV 30mV 8 STEPS NOISE CONTROLLED TRIG. THRESHOLD MIN. TRIG. THRESHOLD 260mV(00) 220mV(01) 180mV(10) 140mV(11) 0.9V VTH 1.5V VPEAK(V) D97AU648 Figure 13. Trigger Threshold vs. VPEAK VPEAK (VOP) D97AU649 20 DEVIATION(KHz) 0.9 1.2 2.0 2.8 DETECTOR OFF (11) 32.5 45 75 10 01 00 Figure 14. Deviation Controlled Trigger Adjustment 2.3V(00) 0.9V VPEAK E’ D98AU863 1.8V(01) 1.3V(10) MONO STEREO noisy signal good signal ATC_SB OFF (11) NOISE »3V Figure 15. Fieldstrength Controlled Trigger Adjustment INGAIN 3.5 ... 11dB STEP 2.5dB INFILTER LP 80KHz 4.th ORDER DEMODULATOR - PLOT CANC - ROLL-OFF COMP. - LP 25KHz PLL + PILOT-DET. F19 NOISE BLANKER F38 STEREO HOLDN SB CONTROL DEEMPHASIS + HIGHCUT t=50 or 75 µs REF 5V VSBL LEVEL INTERN HC CONTROL VHCCH VHCCL D A LEVEL INPUT LP 2.2KHZ 1.th ORDER LEVEL FM_L FM_R MPX 100K D98AU952 GAIN 0..10dB Figure 16. Block diagram of the stereo decoder TDA7403 13/26 |
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