SU443466A1 - Programmable pulse generator - Google Patents

Description

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f The invention relates to radio engineering and can be used to control integrated circuits.

A known pulse generator containing a control device connected to the control input includes digital-to-analog converters of reference voltages and a synthesizer of input words, the source of the reference voltage connected to the reference inputs of the digital-to-amp converters of reference and limiting voltages, level converters whose inputs are connected. , (level switches, the inputs of which are connected to the output.: dofrofan transducers of limiting voltages 11, and outputs connected to the inputs of the test cxeuHJ of the test and to the outputs of the formative pulse, CR, one of which is a soci. dict logical amplifier.

the zero and the amplifier of the logical unit, included in the scale conversion scheme, the inputs of which are connected to the digital and 5 tax converters of the main devices, c; FII.

and in order to expand the frequency range and increase the accuracy in the proposed heater, the K1I pulse generator has been introduced into the composition of a pulse former, an AND circuit whose output is connected to the connection point of the input of the tested integrated circuit with the output

5 clamps with a pulse driver output, one input to the output of the logical unit amplifier, the other to the output of the WL circuit, one input of which is connected to the output of the logical zero amplifier, and the other to the output of the level converter.

FIG. I shows the block diagram of the proposed generator; on

5 1FIG.2 is a functional diagram of one of the t4 pulsed channels. The generator contains a device I control, cirrro-analog converters 2 and d of the reference voltage, shapers 4i-4i, Buiech to two consecutive chains, the first and which consists of an amplifier b, a logical unit, the pattern And 6, and the second - From the amplifier of logic zero, the circuit of the fluid circuit 8j - 8j, the chains form the on-line amplifiers of the logical unit and the logical zero, connected according to the scale conversion scheme, connected to each other along the circuit: the input of the circuit o is the output of the SHW From - 8i circuit - synthesizer 9 Bx words, converters lOj - iOi ur sheep. In addition, the generator contains locks level II, digital-analog converters 12 and 13 of the limiting levels, the source 14 of the reference voltage and test:; i th integrated circuit 15. The generator works as follows. Formers 4i - 411 have the same circuit. Control device I before the beginning ..: test N: a1, the control signals for the reference voltages of converter 2 and 3 are refractory, and the following voltages are kept in the test process: converter 2 is a reference zero of logic zero, and converter 3 is the direction of the logical unit. The outputs of the converters 2 and 3 are connected in parallel with the input of all the generators 4i - 4, the voltage of the logical unit is fed to the inputs of the amplifier 5, and the output voltages of the latter to the inputs of the And 6j circuits - 6d. The input of the logical zero goes to the inputs. Amplifier 7, and the output naprchen of the latter is on the inputs of the circuits 8i - He. By the example, eg: ШW, UD-B diagrams for the second input (I & O., test the control signals from ycipOwCTBa 1 for the synthesizer 9 input SL01; in {a} f; .ii, oi.i control test 3466C synthesizes sets of logical zeros and ones, i.e., input words, and feeds them through converters 10 i - 10 simultaneously to the second 5 inputs of the HW circuits Sj - Q There can be two modes of operation of the generator, cohl from the converters of converters 101 - UEV, for example; logical zero or logical unit, the speed is determined by the circuit And 6 and circuits MI 8 I - 8) and the accuracy (| - the accuracy of the transmission coefficients of the scale conversion of the 6th standard: en, nPiiJ; vi T INVENTORY if the programmer, the No. 1 pulse generator, the control unit connected to the control, the 1 inputs of the digital analogue converters of the reference voltage; and input words synthesizer, reference voltage source, connected to the reference inputs of digital-to-analog converters of supports, limiting voltages ;, 30 1 level level inverters, KOTOI UX inputs are connected to the input of the input words synthesizer, tixators in .. 110, input s KOTOpFJx podkshocheny to vihodam tsitroanalagovyh converter; There are 35 restrictive circuits, and the inputs are connected to the internal circuit and to the outputs of the pulse formers, the pitch of which includes the amplifier zero and the amplifier of the logical unit, according to the lasch scheme. KOTOpjj are connected to the outputs of digital-to-analog converters: 45, Kenya, characterized in that, in order to expand the frequency range and improve accuracy, the KLI circuit, and the output circuit of which half a polk / Schei to the point of connection of the input of the tested and integrated circuit with the output of the Txxator of the level and with the output of the pulse generator, one input to the output of the 55, l logical unit, and the other, To the output of the SHS circuit, one input of which is connected to the output of the amplifier logical Skogen zero, and the other to the output levels of the converter.

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