SU438105A1 - Converter of the difference of two unipolar voltages in the time interval - Google Patents

Description

one

The invention relates to devices for controlling the speed of rotation of contactless DC motors and DC motors in automatic control systems (low power tracking systems).

A known transducer comprising a sign compiler and summing devices connected to the inputs of the entire device, a sawtooth generator, a comparator of forming a time interval.

The disadvantages of the known converter consist in significant dimensional and weight indicators, high power consumption, as well as in the use of magnetic amplifiers, transformers with a large number of conclusions, which in each case require special calculations.

The purpose of the invention is to simplify the device.

This goal is achieved by the fact that in it the saw-tooth voltage generator, through appropriate prohibition circuits, the control inputs of one of which are directly, and the other through the first inverter connected to the output of a comparator of the sign, is connected to the inputs of summing devices whose outputs are connected to the inputs of the comparator of formation the time interval, the output of the latter through a repeater is connected to the input of the third prohibition circuit and through the second inverter -

With the input of the fourth prohibition scheme, the control inputs of which are connected to the corresponding inputs of the first and second prohibition schemes. FIG. 1 is a block diagram of a converter; in fig. 2 - its time diagrams.

The converter of the difference of two unipolar voltages in the time interval contains a generator 1 sawtooth voltage,

the first prohibition scheme 2, the second prohibition scheme 3, the summing devices 4 and 5, the time interval forming comparator 6, the repeater 7, the third prohibition scheme 8, the first inverter 9, the fourth prohibition scheme 10,

comparator 11 characters; second inverter 12.

To output the generator 1 of the saw-tooth voltage, through the first and second projection circuits 2 and 3, are connected to the inputs of summing devices 4 and 5, to the second inputs of which are fed to one input signal; the outputs of the summing devices 4 and 5 are connected to the inputs of the comparator 6 forming a time interval; one output of the comparator 6 through the repeater circuit 7 is connected to the third

circuit 8 prohibition, and another output through the first circuit of the inverter 9 with the fourth circuit 10 prohibition; A comparator 11 characters one output connected to the circuits 2 and 8 of the ban, and the other through the second inverter 12 with the schemes 3 and 10 of the ban. The input signals in the form of two, for example, positive unipolar signals (, I2) are fed to the input of the device (Fig. 1 and 2).

At the comparator 11 characters, these signals are compared and the signal of the resolution of the com- puter to pass through the first and second circuits 2 and 3 of the prohibition of the signal from the sawtooth voltage generator 1 along one of the two channels occurs. The sawtooth voltage of negative polarity is algebraically summed with an input signal of large amplitude (f / gxi or (Uvkha). At the comparator 6, a time interval is formed that is proportional to the difference of the input signals. The device has two outputs: through the repeater 7 and the third prohibition scheme 8, and the first inverter 9 and the fourth inhibitor circuit 10. Depending on the 11 sign of the difference of the input signals determined by the comparator, the output signal in the form of time is supplied through the inhibitor circuit to one of the two outputs of the converter of the interval of {/ out

or t / Bbix.2).

Subject invention

The transducer of the difference of two unipolar stresses in the time interval, containing the sign comparator and. Adders connected to the inputs of the entire device, a sawtooth generator, a time interval comparator, characterized by the fact that, in order to simplify the device, there is a sawtooth voltage generator through the corresponding prohibition circuits that control inputs directly, and the other through the first inverter is connected to the output of the sign comparator, connected to the inputs of summing devices, the outputs of which are connected to the inputs of the comparator forming a time interval, the output is Lednov via a repeater connected to the input of the third prohibition circuit and through a second inverter, the fourth circuit input prohibition control inputs which are connected to respective inputs of the first and second circuits prohibition.

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