Frequency divider - pulse distributor. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Radio amateur designer
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Pulse distributors are nodes that form groups of pulses of a certain level from an input pulse sequence in a certain time order at a given number of outputs, for use in multi-cycle electronic devices.
Fig. 1
The node assembled according to the scheme in fig. 1, differs in a somewhat complicated OS circuit, which in a particular case allows you to get on any of the outputs 1-6 a sequence of pulses of the required logic level with a repetition rate
Fout = Fin/3;
To obtain time-shifted sequences of high-level pulses, outputs 1-3 are used, and low-level outputs 4-6 of the node. Installation input "Set." can be used to synchronize the operation of the node with the beginning of a series of input pulses or with a specific clock pulse.
Fig. 2
Graphs illustrating the work of the divider-distributor are shown in fig. 2. The arrows show the direction of the time shift. Since the described node is almost always part of a more complex device, we only recall here that when using K155 series microcircuits, it consumes a current of about 60 mA.
The device can be used as a frequency divider by three, a master node for a three-phase generator with adjustable frequency, a three-position switch for implementing a three-beam sweep of an oscilloscope. If the FBX input frequency becomes equal to zero, the outputs are set to the levels corresponding to the moment when the count was stopped.
The described node can also be assembled on the corresponding microcircuits of the K133, K533, K555, KR1533, and K511 series (taking into account its supply voltage).
Author: A.Kashkarov
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