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UJT_BISTABLE_WITH_CLAMP

2016-08-09 23:52  
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UJT_BISTABLE_WITH_CLAMP
Clamping diode holds emitter voltage below peak-point voltage. When negative trigger at base B2 turns on transistor, D2 is back-biased and R1 becomes emitter load. Operation is stable if capacitance between emitter and base B1 is kept below critical value.-T. P. Sylvan, Bistable Circuits Using Unijunction Transistors, Electronics, 31:51, p 89-91.