Saturday, March 7, 2015

using 1N4148-s as capacitors

Small 1.2V 140kHz oscillator ::
the grid has not been especially optimized nor made stable against any power-,load-,temperature changes - nor has there been any real world tests of this particular grid (the feature however showed up in a real-world microbe-hour blocking oscillator circuit where the double reversed pulse-diode (not the pulse recovery diode) - capacitors were used)
note. ① the 1N4148 is a pulse-diode ② the diodes that showed the capacitor effect were also pulse diodes but for lower frequency & power & with higher junction (dynamic-)capacity ③ there is no registered (by me) real-world occurrence for the 1N4148-s' acting as capacitors ))

the common cathode -►|◄- cfg. seems to be better than the common anode |◄-►| one , the circuit on the above figure uses the 3-ple diode -►|◄-►| capacitor - that was used prev.-ly in conjunction with quartz resonator (simulation) - in order to minimize external effects reaching the quartz. (see note )

about ::

3-ple diodes ▲

2-ble diodes ▲. . . ? no difference ? . . . ? metal[to]P is same as metal[to]N . . . ? as mean carrier density near the barrier ? or then that model makes no difference

2-ble BJT ▲

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