SU451096A1 - Power function generator - Google Patents

Description

one

The invention relates to a measurement technique and can be used in functional voltage converters to a code as a generator of a reference voltage. A generator of power functions is known, which contains a chronizer, N channels consisting of a series-connected key and a forming circuit, which are connected to a maximum voltage selection circuit.

However, the known generator is characterized by the complexity of tuning to a new exponent and contains a large number of channels necessary to obtain the desired functional dependence with a given accuracy.

The aim of the invention is to simplify the adjustment process and simplify the generator. For this purpose, a linearly varying voltage generator is introduced into the generator, comparing the analog memory devices.

The drawing shows a block diagram of the generator.

The generator of power functions contains keys 1, 2, drivers 3, 4, a chronizer 5, a generator of linearly varying voltage 6, an analog storage device 7, a comparison device 8 and a low-pass filter 9.

The generator works as follows.

2The keys 1 and 2 controlling the operation of the formers 3 and 4 are opened and closed by the output voltage IJ (t) of the chroniser 5. The generator of linearly varying voltage 6 generates a sequence of voltage pulses

U, (t). t,.

This voltage supplies the driver 3, which generates exponential voltage pulses with an amplitude proportional to the values of the current time 2, 3, ... tk

15

and

/.(o -f-4-e, (4, + a

Voltage 6z (0 is connected to one of the inputs of the comparison device 8, to the second input of which a constant voltage f / 02 is applied. At the output of the comparison device 8, a sequence of latitude-modulated rectangular pulses f / 4 (0 with a duration equal to

U, n-ik

tw y. -, In (1)

and

Shaper 4 produces exponential voltage pulses with amplitude

Uoi equal to the value of the supply voltage of this circuit.

U, (t) U ,,. E. , (, +,).

The output of the imaging unit 4 is connected to the signal input of the analog storage device 7. The falling edge of the width-modulated rectangular pulses U (t) opens the input of the device 7, which stores the instantaneous value of the exponential voltage equal to at the instant of time (

m-ti

U, ((,) U ,, - e

(2)

This voltage is remembered for a time slightly different from the period of the chroniser Hz.

At the output of the device 7, a voltage b is formed (0 corresponding to a stepwise approximation of the generated function kt. To smooth out this voltage, a low-pass filter 9 is connected to the output of the device 7.

To generate the functional dependences kt at m О, the output of the generator 6 must be connected to the second input of the device 8 instead of the constant voltage Uo2, and to the power input of the driver 3 to connect a constant voltage. In this case, the generator works in the same way as with 0. Rebuilding the functional generator to a new value t can be carried out by changing the time constant of only one of the formers 3, 4. When the sign of the exponent changes, the generator output b is sufficiently connected to the second input device 8, and a constant voltage is connected to the power input of the shaper 3.

Subject invention

A generator of power functions containing a synchronizer, the output of which is connected to the inputs of two keys connected in series with the driver, and a low-pass filter, characterized in that

simplifying the process of tuning and simplifying the generator; a linearly varying voltage generator is added to it, comparing and analog memory devices, the analog memory device being connected between the output of one of the formers and the low-pass filter; the output of which is connected to the corresponding input of the analog storage device through a comparison device.

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V / move

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