Level changing circuitry for flanks of rectangular or trapezoidal signals - has threshold value discriminator with output signal separated into two channels, each having a gate circuit assigned to SR-flip=flop

摘要

The signal is fed to a threshold discriminator (1) having its output divided between two channels, each of which has a gate unit, a NAND gate (4, 5) connected to the inputs (6, 8) of a set-reset flip-flop unit (7). The output of the latter is extended to a shift register (17) driven at a frequency rising above the frequency of the signal and providing from its last stage two antivalent signals, passed to the gate units in such a way that the changes in level of the output of the flip-flop unit release the gate units for a further change in the switching condition of the flip-flop unit only after at least the time lapse equal to the period of the shift pulse signals. USE/ADVANTAGE - Flanks of signals can be regenerated free from interference and with swings suppressed. Suitable for microcomputers.