SU400038A1 - DIVIDER OF FREQUENCY ON p ^ - Google Patents

Description

one

The invention relates to a pulse technique, in particular to a frequency divider.

A frequency divider is known which contains triggers and a multi-winding transformer associated with the input signal bus.

The purpose of the invention is to increase the interference of the noise and the expansion of the frequency range of work.

This is achieved by the addition of a trigger with a counting input and a phase reversal block of the input signal in the frequency divider, with the outputs of the controlled divider on (+1) triggers connected to the inputs of the matching circuit And whose output is connected to the counting input of the additional trigger, outputs which is connected to the block of the phase reversal of the input signal, included at the input of the input signal transformer.

The drawing shows a functional diagram of the proposed frequency divider.

The frequency divider by n contains; block the phase of the input signal transistors 1, 2 and diodes 3-6; controlled divider 7 on (n + l) triggers and input transformer 8, match the AND 9 with two inputs; trigger 10 with a counting input.

The input rectangular voltage f / in with the removal of the midpoint to the emitters of the transistors I and 2 through the phase reversal unit enters the primary winding 11 or 12 of the input transformer 8. The transistors 1, 2 are controlled from opposite arms of the trigger 10. With the transistor 1 open, the input

the voltage goes through the separating diodes 3, 4 to the winding I, and to the open transistor 2 through the diodes 4, 5 to the winding 12.

Winding 11 and 12 are connected to the input

the voltage in the oscillation phase so that when switching the voltage from one winding to another, the polarity of the voltage on all the windings of the transformer 8 is reversed. From the same shoulders of the two triggers of the controlled frequency divider, through the "And 9" coincidence circuit, the signal arrives at the counting input of the trigger 10.

In the drawing, the connection of the inputs of the match “AND 9 with the first and (“, +)

triggers of the controlled divider so that after the start of the nostun (n + 1) half-wave input voltage, when the first trigger and (n + 1) trigger are set to the same position, a signal will be issued to flip the trigger 10. Assume that the trigger 10 was in a position where transistor 1 is open and transistor 2 is closed. At the moment of arrival of the beginning (+1) half-wave, the device will switch to the first (/ g + 2) trigger in the same position, which will cause the trigger 10 to turn and change the polarity of the voltage on all transformer windings. Changing the polarity of the voltage on the output windings of the transformer will lead to the supply (/ g + 1) of the half wave from the right ring of the trigger arms to the left and the next switching of the equalizer at the moment of existence of the (n - {) half wave of the input voltage. Upon arrival (half-wave input voltage, the controlled divider makes two more shifts. After the input wave (2 / g + 1) arrives at the half-wave of the input signal, all triggers of the controlled divider return to the initial state. 15 Subject of the invention The frequency divider by / g, containing a controlled divider on ("+) triggers interconnected through the transformer windings of the input signal, and an AND matching circuit, characterized in that, in order to increase the noise immunity and extend the frequency range of operation, it additionally sets a trigger with a counting input and a phase inversion block of the input signal, the outputs of the controlled divider on (/ g + 1) flip-flops are connected to the inputs of the matching circuit And, the output of which is connected to the counting input of an additional trigger, whose outputs are connected to the phase inversion block of the input signal connected to the input transformer input signal.