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UC3842BD1 Datasheet(PDF) 11 Page - STMicroelectronics |
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UC3842BD1 Datasheet(HTML) 11 Page - STMicroelectronics |
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11 / 15 page 
D95IN353 + - + RA 1 7 f = R BIAS OSC C 6 VREF R RB + - + - EA R 2R R S Q 84 5 2 3 5K 5K 5K NE555 8 4 2 1 5 TO ADDITIONAL UCX84XAs 1.44 (RA + 2RB)C Dmax = RB RA + 2RB Figure 23: External Duty Cycle Clamp and Multi Unit Synchronization. D95IN352 + - EA + R 2R 5 RT 1 2 EXTERNAL SYNC INPUT The diode clamp is required if the Sync amplitude is large enough to cause the bottom side of CT to go more than 300mV below ground R BIAS OSC CT 0.01 µF 47 Ω 4 8 VREF R Figure 22: External Clock Synchronization. UC2842B/3B/4B/5B - UC3842B/3B/4B/5B 11/15 |
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