01 R = 10kΩ C = 100nF D = DUS T = BC547B; hFE ~320 f = 402.4Hz 02 C = 68pF f = 31.5kHz 04 C = 68pF output load: 3.3kΩ f = 41.72 kHz 05 C = 68pF Shottky diodes from Base to Collector --> static, no clock 07 C = 100nF 2 Shottky diodes fitted in running system runs if running, remains static once stopped clocking measured in static state: Output: 393mV Base: 627mV @Cap/diodes: 1.15C / 920mV / 900mV / 950mV 08 with 3.3kΩ output load different number of Shottky diodes (1 or 2; 3 or 4 always static) different phases 09 C = 68pF output load: 3.3kΩ using DUS as anti-saturation diodes! f = 259.3kHz n.b.: scan of voltage at Cap shows that it doesn't swing below 585mV! redo scan? measured forward voltages of diodes @ 0.7mA: DUS: ~0.53V BC547B ~0.57V the BC547 reaches almost 0V without anti-saturation diodes with saturation limiter: 80mV with 3.3kΩ load