Junction-transistor flip-flops with differential-transformer coupling

Summary form only given. Junction transistor flip-flops for operation up to l00,000 cps can be built using two junction transistors and two transformers per stage without any clamping diodes or elements other than resistors and capacitors. The differential transformer arrangement, in conjunction with the current flowing in one or the other transistors, provides a trigger switching action to direct the flow of energy from the trigger source to the transistor which is on to turn it off. The succeeding pulse energy is switched by the differential transformer anangement to the second transistor causing it to turn on appropriately. This differential switching action can be obtained by the use of saturable transfonners by impedance matching. The general rule in electronic circuits that a transformer coald be traded for a triode section or a transistor holds pretty well in circuits described here. The differential transformer arrangement used under saturation conditions provides a particularly advantageous design for high power output circuits suitable for driving pen motors, paper punches, or other relatively high power elements.