SU960856A1 - Function converter - Google Patents

Description

The invention relates to a howling 1 analog computer technology and can be used as an element automatically in a programmable function generator and hybrid analog computing devices, as well as in automatic control systems, such as driver deadband element ₁₀ utro- Ithel frequency, quadrators, piecewise linear approximator, etc.

'Known dedicated function generator containing ₁₅ conductive input source, an operational amplifier, an adder, a source of reference voltage 1 Cl.

The closest technical solution is a functional converter having two input precision diode limiters connected to the output adder and bias sources [2].

The disadvantages of these devices are limited functionality and reduced accuracy.

The purpose of the invention is improving accuracy and expanding the class of reproducible functions.

This goal is achieved by the fact that p-1 adders and m multi-input blocks of extreme value sampling are introduced into a functional converter containing an input signal source and an adder, with adders combined into m groups, the first inputs of the adders connected to the input signal, and the second inputs - to the bias voltage bus, and the outputs of the adders of each (-group connected to the inputs of the i-th multi-input block of the sample of extreme values, the output of the last of which is the output of the functional conversion, and the output of each Ngo of a multi-input block of a sample of extreme value is connected to an additional

9b0856 4 to the low input of the multi-input block of the sample of extreme value.

In FIG. 1 shows a block diagram of a functional converter; in FIG. 2 an example of performing a piecewise linear approximator based on a block diagram of a functional converter and diagrams explaining its operation; in FIG. 3 “execution of an extreme value sampling block - for the case of determining the maximum value.

The device contains a summarizer. amplifiers C-1 _P , input of converter 2, bias source 3, blocks of 4 _n -4 _m extraction of extreme values, functional converter 5 of the first level (ΦΠΙ), functional converter 6 of the second level FP2, functional converter 7 of the senior (output) level (FP) 'Y). ''

The operation of the functional converter is illustrated by the example of a specific piecewise-linear approximator (Fig. 2).

The input signal ΙΙχ is supplied to the non-inverting inputs of the first two summing amplifiers 1η and 1 ^ ФП1 5 and ФП2 6. There is no bias at the input of the first summing amplifier - C, and at the input of the second ^ it is + U _C1 ^. ''

The transmission coefficient of the first summing amplifier 1η is greater than the second l £. In view of the foregoing, the waveform at the inputs of block 4η of allocating the extreme value in ΦΙ15 is obvious. ΙΙηηΟΤ of the first C and υη ^ οτ of the second C of the summing amplifiers (Fig. 26). The third summing amplifier 1 ₃ is connected with the input signal 1) _Rin at its inverting input, a noninverting input connected to bias source 3 and _S1g. From the third summing amplifier 1¾ to the input and _{1E of the} block 4 _{And the} allocation of extreme values receives the signal U (Fig. 26). Block 4η allocation of extreme values in FP1 5 passes to its output the minimum voltage of the three input voltages U, ^OTCI ° A ^a obvious form of output signal 1C _x (Fig, 26) at the output of block 4η allocation of extreme values, and hence the output FP1 5.

The inputs of the extreme value isolation block 4η in FP2 6 receive signals from FP1 5 and U ^ 4, U 75 _t> from summing amplifiers 1 ₄ and $ 1 (Fig. 2b) j the extreme value isolation block 42 passes the highest voltage to the output from ϋη _χ , Tsu ₄ , 5 The form of the output signal and _1x at the output of FP2 6 are obvious from here (Fig. 2c).

The inputs of block 4 _{δ of the} extraction of extreme values in FPZ 7 receive signals υ _2χ - from FP2 6 and Ufi, U ₁₇ »0 from the summing amplifiers. 1 _fe and C (Fig. 2d), the extreme value extraction unit 4j in FPZ 7 passes the minimum signal to the output, thus forming the output chi-15 cash, which is the output of the device as a whole.

Obviously, to increase the accuracy of the piecewise linear approximation ^, it is necessary to increase the number of 20 linear sections, and therefore, increase the number of bias sources (resistor’s voltage dividers), the number of summing amplifiers, and accordingly the number of inputs of the blocks for extracting extreme values.

To approximate the downward bulge, the blocks of extraction of the extreme value are used, the choice of the maximum 3Q (Fig. 3). The above reasoning is given for the quadrant + Ug _btx H + U ^ _X. 'In the same way, approximation is carried out in the remaining quadrants. Thus, the proposed functional converter can approximate any function with the desired accuracy.

Obviously, the proposed ΦΠ has a recurrence structure: any transformer of any higher level of phase transitions; is built according to the rules describing the construction of the converter of the previous level ΦΠ ^ .η, while additional inputs are used.

Technical and economic effect Images ⁴⁵ Retenu is to obtain incremental, precise, universal functional converter with a homogeneous structure and high functionality.

^{50 The} economic effect will increase significantly when multi-input blocks of extreme value extraction are manufactured using integrated technology.

Claims (2)

The invention relates to analog computing and can be used as an element of an automatically programmable function generator in analogue and hybrid computing devices, as well as in automatic control systems, for example, as a generator of dead frequencies, quadrants, linear approximator, etc. A specialized functional converter is known, which contains an input signal source, an operational amplifier, an adder, and a reference voltage source Cl. The closest technical solution is a functional converter having two input precision diode limiters connected to the output adder and bias sources 2. The disadvantages of these devices are the limited Vt functionality and reduced accuracy. The purpose of the invention is to improve the accuracy and the expansion of the class of reproducible functions. The goal is achieved by the fact that n-1 adders and m multi-input sampling blocks of extreme value are entered into the functional converter containing the input source and adder, the adders are combined into m groups, the first adders are connected to the k input source, the second inputs - to the voltage bus, bias, and the outputs of the adders of each (-groups connected to the inputs of the i-ro multi-input sampling block of extreme values, the output of the last of which is the output of the function transformed , and the output of each Ngo multi-input extremum sampling block is connected to an extra 3tJ6 | 1 input input of the multi-input extremum sampling block. Fig. 1 shows a block diagram of a functional converter; Fig. Example of a piecewise-linear approximator based on the block diagram functional converter and diagrams, which explain its operation in Fig. 3, the execution of an extremal value sampling block - for the case of determining the maximum value. The device contains summing amplifiers, converter input 2, bias source 3, blocks, extraction of extreme values, functional transducer 5 of the first level (OP1), functional transducer 6 of the second level OP2, functional transducer 7 of the highest (output) level. -, n (FPU). The operation of the functional converter is illustrated by the example of a specific embodiment of a piecewise linear approximator (Fig. 2). The input signal Uy is fed to the non-inverting inputs of the first two 1P FP1 summing amplifiers 1 and Ir, 5 and FP2 6. The offset at the input of the first summing amplifier - 1 is absent, and at the input sToporqi - equal to -t-Uc. The transmission coefficient of the first summing amplifier 1 is greater than the second one. Considering the above, the shape of the signals at the inputs of the allocation unit k of the extreme value in the FP5 is obvious. the first C and the third summing amplifiers (Fig. 26). The third summing amplifier 1j is connected to the intercom signal Ug by its inverting input and a non-inverting input connected to the source 3 of the bias Uj ;. From the third summing amplifier 1, a signal arrives at the input U, j of the extreme value allocation unit k (Fig. 26). An extremal value isolation unit k in FP1 5 skips to its output the minimum voltage of the three input voltages J., Ts. From here, the output signal Shch5 (FIG. 26) is obvious at the output of the allocation unit A extreme value, and therefore output FP1 5 .., The inputs U-1X from FP1 5 and U-j4 iJ i5 from the summed-up amplifiers 14 and Ij (FIG. 2c) are passed to the inputs of the extremum allocation block k in the FP2 6, block 2 of the extreme value extraction at the output the highest voltage from C, T, C. Hence the form of the output signal of the FP2 6 is obvious (FIG. . 2c). The inputs of the extreme value allocation unit in FPZ 7 receive signals from OP2 6 and and, from summing amplifiers. 1 C (Fig. 2d), block 3, the selection of the extreme value in the FPZ 7 passes a minimum signal to the output, thus forming an output C (- tal, which is the output of the device as a whole. Obviously, to increase the accuracy of the piecewise linear approximation increase the number of linear sections and, consequently, increase the number of bias sources (resistor-voltage separators), the number of summing silicates and, accordingly, the number of inputs for the allocation of extreme values. - For approximation to bulking down, the selection blocks of the extreme value of the maximum selection are used (Fig. 3). The above reasoning is given for the quadrant + un., and + and. In the same way, the other quadrants are approximated. Thus, the proposed functional converter can approximate any function the desired accuracy. Obviously, the proposed OP has a recurrent structure: any converter of any higher level is constructed according to the rules describing the construction of a converter of the preceding level SCF. This uses auxiliary inputs. The technical and economic effect of the invention is to provide an expandable, accurate, universal functional converter with a homogeneous structure and broad functionality. The economic effect will be greatly enhanced by the manufacture of multi-input blocks for allocating extreme values using an integrated technology. Claims of the Invention A functional transducer containing a source of an echo signal discriminator and an adder, c. . By the fact that, in order to increase the accuracy and expand the class of reproducible functions, n-1 adders and m multi-input extremal sampling blocks were introduced into it, the adders being combined into m groups of the first inputs of the adders connected to the input source signal, the second inputs to the bus bias voltage. and the outputs of the adders of each -th group are connected to the inputs of the i-ro multi-input block of sampling of extreme value, the output of the last of which is the output of the functional 96 \ converter, and the output of each i-ro multi-input block of sampling; the extremal value is connected to the additional input of the n + 1 th multislot entry block of the extremal value. Sources of information taken into account in the examination 1. USSR author's certificate number, cl. G About G 7/26, 197. 2. Design and commentary of operational amplifiers. Ed. J. Graham, M., Mir, 197, p. .2 / 9, fig. 7.25 (prototype). 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