SU756623A1 - Device for exciting magnetic modulator - Google Patents

Description

The invention relates to electrical engineering and is intended for use in measuring DC amplifiers on magnetic modulators. five

A device for the excitation of a magnetic modulator, containing two frequency divider, the inputs of which are connected to the anti-phase outputs of the generator [1).

Its disadvantage is the instability of the phase shift between the output voltages.

The aim of the invention is to increase the stability of the phase shift between the '15

output voltages.

The goal is achieved by the fact that the device for exciting a magnetic modulator containing two frequency dividers, clock inputs of which are connected to anti-phase outputs of the generator, frequency dividers are made on ZE-triggers, the direct output of one P-trigger is connected to the-input another T> trigger, and an inverted * 5 sivny output with its ϋ-input. "" Direct outputs of TE-flip-flops are connected to output buses through filters.

FIG. 1 shows a diagram of a device for the excitation of a magnetic mod

lator; in fig. 2 shows time diagrams of his work.

The device contains a generator 1, the direct and inverse outputs of which are connected to the clock inputs of the P-flip-flops 2, 3, the direct outputs of which through filters 4 and 5, respectively, are connected to the excitation windings of the magnetic modulator b.

The device works as follows.

'Paraphase rectangular pulses (Fig. 2 α nd b') from the outputs of generator 1 arrive at the clock inputs of flip-flops 2 and 3. Rectangular frequency pulses £ / 2 (Fig. 2-β) from the direct output of flip-flop 3 act on the P input flip-flop 2. During the positive) signal differential at the direct output of generator 1, the potential at the direct output of flip-flop 2 (Fig. 2t) is set to the same as that at its P-input at the moment of positive differential at the direct output of the generator. Trigger signals through filters 4 and 5 arrive on the output bus. To which are connected the modulator 6 hours excitation winding.

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As can be seen from the time diagrams, the voltage at the direct output of the trigger 3 always precedes the voltage at K / 2 and the direct output of the trigger 2, i.e. The device provides a fixed phase rotation order, which allows to eliminate the drawback of devices using a magnetic modulator with excitation from a quadrature shift scheme - changing the initial zero offset of the output signal of the magnetic modulator at different switch-ons of the device due to a change in the order of phase alternation of signals in the excitation circuit allows you to increase the stability of the zero magnetic modulator.

Claims (2)

Claim 1. Device for the excitation of a magnetic modulator containing · two frequency divider, clock Input kF ¹ · " tory connected to antiphase generator outputs, characterized in that, in order to increase the stability of the phase shift between. , output voltages, dividers frequencies are made on три-flip-flops, with a straight line, the output of one P-flip-flop is connected to the TE-input of another 35 flip-flop, and the inverse output is with its U 35-entrance. ' 2. The device is pop. 1, about λη4 a yu with the fact that the spicy outputs of the E-flip-flops are connected to the output buses through filters. 15