SU883921A1 - Pulse-time dividing device - Google Patents

Description

The invention relates to analog computing and can be used in simulators and as part of information-measuring transducers. Known time-impulse dividing device, built on. based on a controlled standby multivibrator 1. The disadvantage of it is low accuracy. In order to increase accuracy, the time-pulse separating device is performed according to a compensation circuit. The disadvantage of it is considerable inertia, defined by e-. The presence of smoothing filters in its composition. The closest to the present invention is a time-pulse separating device containing a series-connected pulse voltage divider, an error amplifier, an adder, a controlled pulse generator, a scaling resistor connected to the input of the error amplifier, the output of the controlled pulse generator is connected to the second input of a pulse voltage divider wives The accuracy of this high-speed dividing device is determined by the accuracy of the voltage shaping at the output of the pulse voltage divider (IDN) T2. However, with a small value of the ratio of input signals to the magnitude of the output voltage, the IDNs begin to have a significant effect - long-term. These pulse fronts and surges resulting from the switching of its key and the error of the device increase. To increase the accuracy of the device, it is necessary to eliminate the mode of operation in which averaging pulses of short duration is required. The purpose of the invention is to improve the accuracy of the device.

The goal is achieved by the fact that in time a pulsed dividing device containing a large-scale resistor, a series-connected key, a dividing resistor and a separating capacitor, the first output of the large-scale resistor is connected to the zero potential line via a dividing capacitor, and the first fixed contact of which is connected to a zero-potential bus, a series-connected error amplifier, an adder and a controlled pulse generator, the output of which is connected to the control input of the key, the second fixed contact of which is connected to the second input of the controlled pulse generator and is the input of the device divider, the second input of the adder and the second output of the scale resistor are combined and the input of the divisible device, the input of the error amplifier is connected to the first the output of the scale resistor, a dividing unit, an inverter, a bias resistor, and an element, the first input of which is connected to the output of the controlled pulse generator, the second input element nA is connected to the output of the split unit, and the output of the element I is the output of the device; one output of the bias resistor is connected to the input of the error amplifier, and the other is connected to the output of the inverter, to the third input of the adder and to the first input of the division unit whose second input is connected to the input of the inverter and to the second input of the controlled pulse generator.

The drawing shows a functional diagram of the time-pulse separating device.

The time-pulse separating device contains an inverter 1, an adder 2, an amplifier for reconciling 3, a controlled pulse generator 4, a scaling resistor 5, a dividing resistor 6, a decoupling capacitor 7, a switch 8, an offset resistor 9, a dividing unit 10, an And 11 element.

Time-pulse dividing device operates as follows.

The voltage of the dividend signal is applied to the first input of the device, and the voltage of the divider signal is fed to the second input. Inverter 1 inverts the voltage. At the output of the adder

2, a voltage equal to the sum of the output voltages of the inverter, the error amplifier and the first input signals is generated.

The voltage of the adder is applied to one input of the controlled pulse generator, and the voltage of the divider is fed to the second input. At the output of the controlled pulse generator, a pulse is formed, the duration of which is proportional to the ratio of the output voltage of the adder and the divider signal.

It can be shown that the pulse at the output of the controlled pulse generator will have a duration

i -G

 1 AND R Rn

.

Where tff o - fixed momentum

duration; 5 (and resistors

5, 6 and 9 respectively; transfer coefficient

inverter.

At the output of the dividing unit 10 a pulse t is formed. At the inverse output of the controlled pulse generator of the dividing block 10, a pulse of the same duration to is formed, but its polarity is opposite. This impulse is fed to one input of an element 11, and to the second input of which an impulse 1c is applied. Essentially, the output of the element 11 will be the subtraction of a pulse of duration t (j from the pulse of duration ty. As a result, the duration of the output pulse of the device is equal to

V -T.i,.

Those. the output characteristic of the device passes through the origin (the pulse duration can be arbitrarily small), but the accuracy is high.

"HZ

iK, T

Claims (2)

The error of the proposed device with small values of the ratio of input signals is much less than that of the known. This is achieved with the exception of the operation mode of the compensation part of the device with short pulse durations. The invention is a time-pulse separating device containing a large-scale resistor, a series-connected key, a dividing resistor and a dividing capacitor, the first output of the scaling resistor is connected via a dividing capacitor to a zero potential bus, and through a dividing resistor to a moving key contact, the first fixed contact of which is connected to the zero-potential bus, a series-connected error amplifier, an adder and a controlled pulse generator, the output of which is The switch is connected to the control input of the key, the second fixed key contact is connected to the second input of the controlled pulse generator and is the input of the device divider, the second input of the summer and the second output of the large-scale resistor are combined and the input of the error amplifier connected to the first output of the scale resistor, so that, in order to increase accuracy, a dividing unit, an inverter, an offset resistor and an And element, whose first input is connected to the control output, are inserted into the device The second pulse input terminal is connected to the output of the dividing unit, and the output terminal of the device is the output of the device, one output of the bias resistor is connected to the input of the error amplifier, and the other output is connected to the output of the inverter, to the third input of the adder and to the first input of the unit dividing, the second input of which is connected to the input of the inverter and to the second input of the controlled pulse generator. Sources of information taken into account in the examination 1.Smolov V.V. and Ugryumov E.P. Time-pulse computing devices. L., Energie, 1968. 2. USSR author's certificate f, cl. G 06 G 7/161, 197 (prototype).