The fix via C2 charge injection on oscillation startup to equalize pulse length

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• Article «More gated 555 astable multivibrators hit the ground running»
• Figure 1. The problem - the first oscillation cycle has a too-long first pulse on start-up, when gated by the RESET pin from oscillation-off to oscillation-on
• Figure 2. The fix via C2 charge injection on oscillation startup to equalize pulse length
• Figure 3. The long first-pulse problem also occurs in a 50:50 square wave topology popular for CMOS 555s
• Figure 4. C2 charge injection fix applied to CMOS 50:50 square wave oscillator
• Figure 5. Bipolar 555 in gated 50:50 square wave configuration
• Figure 6. C2 charge injection first-pulse fix modified for bipolar 555 square wave generation