Tag
oscillators
3 articles.
- UART baud rate error: how much you can get away with
Why 2 % per end is the limit, where 8.5 % errors come from, what the odd crystal values buy, and what a fractional baud divider costs you in return.
- 555 astable design: frequency, duty cycle and error
Size RA, RB and C for a 555 oscillator, find out why the duty cycle cannot reach 50 %, and see which of the datasheet's error terms actually dominates.
- Why the crystal won't start
A Pierce oscillator fails in a few ways: too little gain for the crystal's ESR, too much drive, wrong load capacitance, or stray capacitance. Each has a test.