Using the diodes along with R B as shown in Figure 5-64, calculate the values of R
Question:
Using the diodes along with RB as shown in Figure 5-64, calculate the values of RA and RB necessary to get a 1 kHz, 25 percent duty cycle waveform out of a 555. Assume C is a 0.1 μF capacitor.
Figure 5-64
Transcribed Image Text:
Inset Rg D₁ 01730₂ 0.94 R₂C = 0.94 RAC ¹L = 0.693 RBC TH=0.693 (R₂ + Rg)C RA 1 KQ RA + RB <6.6 MO C 500 pF +5 V RA R₂ I 7 Discharge 6 VT+ 5 Control voltage 2 VT- R O = Open I = Closed R R 1 T=t+tH 1-1/ Duty cycle www +5 V 8 GND Vcc Voltage comparators 2/3 Vcc 1/3 Vcc x 100% S K Reset CLR RQ Q H Out 3
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Related Book For
Digital Systems Principles And Application
ISBN: 9780134220130
12th Edition
Authors: Ronald Tocci, Neal Widmer, Gregory Moss
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