SU418862A1 - - Google Patents

Description

one

The invention relates to the field of automation and computing.

Pulse-frequency devices for generating power-law functions are known, containing a clock generator connected via a gate to the first input of a counter and through a shaping circuit to the first inputs of two exponential generators, the other inputs of which are connected to a reference voltage source, a code-voltage converter, a comparator , the key circuit connected to the capacitive drive and the output amplifier, and the first input through an inductive delay element to the second input of the counter.

The proposed device differs from the known ones in that the other valve inlet is connected to the device inlet. The outputs of the counter are connected to the corresponding inputs of the converter code - voltage, the output of which is connected to the first input of the comparator connected to the second input to the output of the first exponential generator. The comparator output is connected to the first input of the key circuit, the second input of which is connected to the output of the second exponential generator.

This allowed to increase the speed of the device.

The block diagram of the device shown in the drawing.

The device contains a clock generator 1, valve 2, counter 3, forming circuit 4, exponential generators 5, 6, source of reference voltage 7, converter code - voltage 8, compiler 9, key circuit 10, capacitive storage 11, output amplifier 12 and an inductive delay element 13.

The device is designed to obtain the voltage of the bw DC current associated with the frequency FX of the original signal according to the form

(la)

 - R-O

U ,,, VF (t). (sixteen)

The device works as follows.

The operation rhythm of the device is set by the clock generator 1, which generates a sequence of rectangular pulses with a TO period and a duration that are used to control the potential-potential gate 2 (“I” scheme). The pulse input of the valve 2 receives the converted frequency-pulse signal Fx (t), which is transmitted periodically in bursts to the counting inputs of the counter 3, working on the code-voltage converter 8. During the time TO of the next pulse from the generator 1 output, the counter 3 receives the number n of pulses Fx (t), equal to n.,. F, (f), (2) and on the output of the converter code - voltage 8 is remembered voltage U, k, -F (t}, (3) where / ii - constant a coefficient determined by the duration TO and the value of the voltage quantum. Simultaneously, the shaping circuit 4 ensures short pulse, the time corresponding to the falling edge of the front pulse of generator 1. This pulse is used to start generators 5 and 6, which provide the output of: Ul and t / 2 Ui U, -r, -G, (4) where ai О2 - constant time of the discharge G1, epey generators 5, 6. The output voltage Ui is then fed to the first input of the comparator 9, the second input of which is connected to the output of the converter code - voltage 8. When the equality Ui t / i comes from the output of the comparator 9 a short pulse arrives that controls the pulse input key second circuit 10 with a capacitor 11 to drive its output. Since the potential input of the circuit 10 is connected to the output of the second generator 6, the drive 11 is charged to a voltage equal to f / 2. UJ where / is the instant of operation of the comparator 9. Thus, we can write down two equalities: the first, corresponding to the instant of operation f of the comparator 9, Ui, (6) and the second, defined by relation (5). Solving equations (5) and (6) with respect to time f and taking into account equation (3), semi f / o 1 / "Equating the value of f from equations (7a) 5 and (76), we obtain (8) But the voltage from the capacitive storage P through the output amplifier 12 is fed to the output of the circuit, i.e. 2 cx (0. Solving equation (8) with respect to 2: t /, x (O. we get U2 - f / BUX (f - 0 f Ar). F.. The type of functional dependence (9) depends on the choice of the co-secret values of the constant time bit prices of the generators 5, 6, i.e. the values of "i and osg. At 01 02 f / Bbix feo-Fx. I.e. input frequency Px, with a, -: 2d2 f / o - with a g - 2a, So In this way, by changing the values of oi and 02. we obtain output voltages that are proportional to the integer or fractional degree of the initial frequency-pulse signal. An Stimulation, for example, of digital-controlled resistance in the discharge circuits of the generators 5 and 6, allows to obtain more complex functional dependencies that are tunable in time but necessary by law. 11: i scrambled a part-nm pulse device for generating power functions containing a clock generator connected through a gate to the first input of the counter Forming circuit with the first inputs of two exponential generators, the other inputs of which are connected to the reference voltage source, the converter code - voltage, comparator, the key circuit connected by the output to the capacitive drive and the output amplifier, and the first input through the inductive delay element to the second the input of the counter, characterized in that, in order to increase speed, in it another valve input is connected to the input of the device; the outputs of the counter are connected to the corresponding inputs of the converter; code - voltage, the output of which is connected to the first input of the codec connector, connected by a second input to the output of the first exponential generator; and the comparator output is connected to the first input of the key circuit, the second input of which is connected to the output of the second exponential generator.

,: af

I fy IU.

 , ofiL-f. s i

 //