The invention provides a T trigger, a multimode
frequency divider and a phase-locked loop, and relates to the technical field of electronic circuits, the output end of a first D trigger is connected with the grid
electrode and the drain
electrode of a first
triode, the reverse output end of the first D trigger is connected with the grid
electrode and the drain electrode of a second
triode, and the grid electrode of a sixth
triode is connected with the
signal input end of the T trigger; the drain electrode and the grid electrode of the third triode are connected with the source electrode of the first triode and the inverted
input control end of the T trigger, the source electrode is connected with the source electrode of a fourth triode and the drain electrode of a fifth triode, the grid electrode of the fourth triode is connected with the
input control end, and the grid electrode of the fifth triode is connected to the
signal inverted input end of the T trigger; the drain electrode of the
tail current tube is connected with the source electrode of the sixth triode and the source electrode of the fifth triode, the grid electrode is connected with bias
voltage, and the source electrode is grounded; the output ends and the reverse output ends of the two-stage first D flip-
flops are correspondingly connected with the input ends and the reverse input ends of the two-stage first D flip-
flops, so that multi-bit
mode control can be realized, and a continuous and programmable frequency division value is realized.