| 摘要 |
<p>The invention relates to a circuit for controlling the cyclic ratio of a periodic pulse signal. This circuit comprises a monostable flip-flop receiving the pulse signal at its switching input, a comparator constituted by an operational amplifier respectively receiving at its inputs the direct and complementary output signals of the monostable flipflop, the output of said amplifier being connected to the conducting period control input of the flipflop. The operational amplifier also comprises a control input for the offset voltage of the signals applied at its inputs, said control input making it possible to regulate the cyclic ratio of the flipflop output signals. Application to frequency multiplication, particularly for four-state modulation by phase displacement.</p> |
