SU712938A1 - Generator of functions non-coincidental in time - Google Patents

Description

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FIELD OF THE INVENTION The invention relates to radio engineering and automatics, in particular, to information and information technology.

Generators of non-coincident time discrete functions 1 are known, which contain trigger frequency dividers and decoders associated with the bits of the frequency dividers and their inputs. In these devices, the sampling of the pulse series from the bits of the frequency dividers is performed using single or multi-stage decoders, and the discrepancy between the output pulses and time is provided by synchronizing the decoders with input frequency pulses.

The disadvantage of such schemes is the need to use decoders, the complexity of which increases dramatically with increasing frequency divider frequency.

The closest to the proposed invention is an unmatched oscillator, their discrete functions 2 in time, the trigger frequency divider and selective pulse shortening elements associated with the outputs of the counter bits. A series of short pulses are formed at the outputs of the bits of the frequency divider with the help of differentiating ferrite transistors. The mismatch in time of the output pulses of different divider bits is ensured by the fact that the transistor amplifier of the differentiating element responds selectively to the sign of the signal during differentiation. The latter allows only pulses to be used as output, corresponding to the moments of writing (and not reading) information in the considered frequency divider, which excludes the appearance of output pulses at any other bit of a serial frequency divider at this moment.

However, such a generator cannot be fully implemented on potential elements, which reduces its reliability.

The purpose of the invention is to increase the reliability by running the generator entirely on the potential elements.

This is achieved by the fact that in the proposed generator, pulse triggers with a counting input and an inverse input of the zero setting are used as pulse shortening elements, the inverse output of each trigger of the frequency divider is connected to the counting input of the next trigger of the frequency divider, the direct output of each trigger of the frequency divider is connected with the counting input of the corresponding pulse shortening trigger.

The inverse inputs of the zero setting of all the pulse shortening triggers are connected to the frequency divider input, and their outputs are the generator outputs.

The drawing shows a block diagram of the proposed generator of non-coincident discrete functions.

The generator contains a trigger frequency divider 1 with input 2 and the pulse shortening selective elements associated with it, made on triggers 3, 4, 5 with a counting input and with an inverse input of the zero setting. In this particular case, the frequency divider is designed as a binary frequency divider on the 6, 7, 8 triggers. The single outputs of the 6, 7, 8 triggers serve as outputs 9, 10, 11 of the generator. Inverse inputs of the installation of zero triggers 3, 4, 5 are connected to input 2.

The generator works as follows.

Upon arrival at input 2 of divider 1 of the input frequency pulses in triggers 6, 7, 8, one is alternately recorded at the counting inputs. For each of the specified triggers, this only takes place if at this moment the unit is written (but not read) to the corresponding trigger of the frequency divider associated with it. The latter is connected with the trigger selectivity at the counting input to the sign of the derivative of the signal changes. For the element base received in the circuit (shown in the drawing), as can be seen from the links between the bits of the frequency divider itself, the triggers trigger on the counting input when the input signal changes from zero to one.

The signals arriving at the outputs 9, 10, 11 are shortened by means of clocking with input frequency pulses arriving at the inverse inputs of the zero setting of the flip-flops 6, 7, 8. Returning to the initial state of the one in which the clock was written to is produced at the falling edge of the input frequency pulse. The duration of the existence of a single signal at any of the outputs 9, 10, And is equal to the duration of the pulse of the input frequency.

Thus, the selectivity of the counting trigger to the sign of the derivative of the input signal and the possibility of timing make it possible to realize a generator of non-coincident time discrete functions by the field on the potential elements, and therefore, in the integral design.

This technical solution is universal in relation to the work code of the frequency divider. If it is necessary to obtain various temporal and quantitative relationships between the generated series of pulses, not only binary, but also trigger frequency dividers operating in other codes can be applied.

One of the applications of this technical solution may be its use in constructing discrete-frequency synthesizers.

Claims (2)

1.Bukreev I.N., Mansurov B.N., Gorchev V.I. Microelectronic circuits of digital devices. M., Sov. radio, 1975, p. 281. 2. Furman B. A. A binary controlled frequency divider for setting the speed ratio in digital speed controllers. - “Instruments and control systems, 1968, No. 6, p. 14 (prototype).