JPS5579527A - Pulse width converter - Google Patents

Abstract

PURPOSE: To convert input pulses of random width into output pulses of constant width by generating pulses synchronizing with pulses, obtained by dividing high- frequency clock pulses by input pulses, and clock pulses.

CONSTITUTION: Clock pulses B are applied to terminal 1, and input pulse A is to terminal 2; and FF7 is set at a fall of pulse B right after pulse A and gate pulse C is outputted from terminal Q' and then inputted to gate 6. Gate 6 performs the logical sum of pulses A and B to generate set pulse D, thereby resetting FFa 4 and 5 of divider circuit 3. Circuit 3 starts dividing pulse B and FFs 4 and 5 generate division outputs E and F. After three pulses B from the leading edge of pulse D are divided, gate 9 generates reset pulse G. Pulse D from gate 6 sets FF8 and pulse G from gate 9 resets it, so that output pulse H of constant pulse width equivalent to three pulses B can be obtained from FF8 at any time.

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