| 摘要 |
PURPOSE:To obtain an FF circuit having a wide range of utilization by forming the FF circuit of a main FF circuit and steering circuit, and allowing it to respond to even a reset input signal in addition to a clock input. CONSTITUTION:The main FF circuit formed of transistors TR1 and TR2 and resistances R1-R4 holds the TR1 on and the TR2 off, or in the reverse states, and those states are outputted from its output terminals Q and Q'. Then, TR3 and T4, and resistances R5 and R6 constitute a steering circuit for driving the main FF circuit to switch respective on-off states of the TR1 and TR2 at a rise of an input signal pulse applied to a terminal T, or to hold them in the same state as the main FF circuit in the H-level state of the input signal to the terminal T. Further, TR7 and TR8, and resistances R7 and R8 operate as a resetting function, and when the signal pulse is applied to an input terminal RP while the input signal changes from L to H and the TR2 and TR3 are turned on, the TR7 and TR8 turn on to invert the on-off states of TRs in both circuits. |
