SU883924A1 - Function generator - Google Patents

Description

one

The invention relates to electrical converters of analog signals according to a certain law and can be used in analog computers.

A functional converter is known that contains a comparison unit, a control unit, a reference voltage unit tl3 ..

However, this device is characterized by relatively low accuracy of operation.

Closest to the proposed is a functional converter containing a synchronization unit and a comparator 2

The disadvantage of the device is the realization of only one functional dependency - the logarithmic one, and the impossibility of the realization of the Hilbert transform.

The purpose of the invention is the expansion of functional capabilities through the implementation of the Hubert transform.

The goal is achieved by introducing a time converter into a voltage, a controlled negatron, and a differentiating capacitor, the first terminal of the differentiating capacitor being the input of the functional converter, the second terminal of the differentiating capacitor connected to the input of the controlled converter. negatron, the output of which is connected to the input of the comparator, the output of the synchronization unit is connected to the control input negatron and the first input of the time converter to the voltage, the second input of which is connected to the output of the comparator, the output of the time interval converter to -15; the voltage is the output of the functional converter, and the controlled negatron contains an operational amplifier, current generator, a key and scale resistors , between the non-inverting and inverting inputs and the output of the operational amplifier, the first and second large-scale resistors, the inverting input, and the operational Phone

25 through a third scale resistor and a switch connected in series to a zero potential bus, the non-inverting input of the operational amplifier is connected via the current generator to the zero potential bus, the non-inverting B54od operational amplifier is the input and output of a controlled negatron, the control input of which is a control input key.

FIG. 1 shows a functional diagram of the functional converter; in FIG. 2 - the same, controlled negatron.

The device contains differentiating capacitor 1, controlled negatron 2, comparator 3, time converter to voltage 4, synchronization unit 5, input b and output 7 of the functional converter, operational amplifier 8, first, second and third scale resistors 9, 10 and 11 , a current generator 12, a key 13, a zero potential bus 14, regulating the input 15, the input 16 and the output 17 of the controlled negatron.

Functional Converter works as follows. . .

In the initial state, the Controlled Negatron 2 is in a stable state, characterized by a positive input resistance, and at its output a BXOflHoii signal differentiated by differentiating capacitor 1 is output.

The trigger signal corresponding to the selected time of the Conversion, about the synchronization unit 5, goes to the converter of the time interval 4 and to the regulating input of the controlled negatron 2. The controlled negatron 2 is transferred to an unstable state characterized by a negative input resistance. The output voltage of the controlled negatric 2 increases, and the shape of this voltage is determined by the shape of the input signal before and after the signal from the synchronization unit 5, as well as the input resistance of the controlled negatron 2 and the capacitance value of the differentiating capacitor 1. The output signal of the controlled negatron 2 is fed to the input of the comparator 3 / which is triggered when the output signal of the controlled negatron 2 reaches a certain fixed voltage level. The triggering of the comparator 3 corresponds to the end of the time interval. The time interval converter into voltage 4 performs the time interval conversion between the signal from the synchronization unit 5 and the output signal from the comparator .3 exponentially.

The response of the time converter to voltage 4 is the voltage drop at the output of the device, i.e. its transient response is two exponents that approximate the Hilbert transform response.

Claims (2)

1. A functional converter comprising a synchronization unit and a comparator, characterized in that, in order to extend the functionality by implementing the Hilbert transform, a time interval converter is introduced into the voltage, the negatron controlled and the differentiating capacitor, the first output of the differentiating the capacitor is the input of the functional converter, the second output of the differentiating capacitor is connected to the control input of its negatron, the output of which is connected With the comparator, the output of the synchronization unit is connected to the regulating input of the controlled negatron and the first input of the time converter to the voltage, the second input of which is connected to the output of the comparator, the output of the time converter to the voltage. 2. The converter according to claim 1, characterized in that the controlled negatron comprises an operational amplifier, a current generator, a switch and large-scale resistors, between the non-inverting and inverting inputs and the output of the operational amplifier, the first and second large-scale resistors, the inverting input of the operational amplifier, are connected through connected In series, the third scale resistor and switch are connected to the zero-potential bus; the non-inverting input of the operational amplifier is connected to the zero-voltage bus through the current generator potential of, a non-inverting input of the operational amplifier is an input and output negatron controllably regulating the input of which is a control input klyu.cha. Sources of information taken into account in the examination 1. USSR author's certificate number 423138 ,. CL G. 06 G 7/26, 1972. 2. Smolov V.B. et al. Time pulse computing devices, Energie, 1969, p. 75-78, fig. 41a (prototype). 15 -N face 2