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
| Authors | Stephen Woodward |
| Main Document | Article «More gated 555 astable multivibrators hit the ground running» |
| Description | Figure 1 |
| File Format / Size | PDF / 13 Kb |
| Document Language | English |
Other Materials from the Main Document
- 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
