SU612191A1 - Arrangement determining logic unit functioning - Google Patents

Description

one

 The invention relates to a measurement technique and can be used in the sorting and classification of logical electronic speed components.

A device for controlling the logical operation of electronic batteries, comprising an impulse generator, a pulse distributor, a reference and measurable ground unit, an indicator l, is known.

However, this device has a low speed.

It is also known a device for determining the Functioning of logic blocks, a generator, an indicator device, a "pulse generator, a test subject and a step-down electronic units, a junction 2 element.

However, this device has low speed and has a low intensity of intentions due to the manual setting of the generator frequency.

Uenb inventions are an automation of the intent process.

This is achieved by the fact that in a device for determining the functioning of logical blocks containing a signal generator, a pulse shaper, an output to the jj of which is connected to the first terminal of the test block and to the nepBosiy input of the reference block, the single vibrator whose output is connected to the first input of the first element the second element of the match, the indicator, the comparison element, the delay element and the control unit, the output of which is connected through the signal generator to the input of the indicator and to the second input of the first match items, exit

Claims (2)

1 & is hooked up to the input of the forms {the attenuator and the input of the delay element; The first input of the reference element, the second input is connected to the output of the standard2S unit, and the output of the comparison element is connected to the input of the one-vibrator, while the output of the second coincidence element is connected to the input of the control unit. The drawing shows the structural scheme of the proposed device. The device contains a signal generator 1, the first element 2, the pulse shaper 3, the reference unit 4, the comparison element S, the one-shot 6, the delay element 7, the second match element 8, the control unit 9, the indicator 10, the terminals 1 12 and 13, which is connected to the test unit 14 The device operates as follows. At the beginning of the measurement cycle, the voltage at the output of block 9 is zero and the signal generator 1 produces low frequency oscillations. These signals, having passed the first element of coincidence 2, pulse generator 3, are fed to the input of reference block 4. Simultaneously, the pulses from the output of the first element of coincidence 2 pass through delay element 7, the second element of coincidence 8 and accumulate in block 9, the output voltage Bpock 9 acts on the signal generator 1, increasing the oscillation frequency by. his exit. The increase in the oscillation frequency at the output of the signal generator 1 occurs until a failure occurs in the test block 14. At the same time, at the output of the element of comparison 5, according to a Wits pulse. which will start the one-shot 6. Pulse. from the output of the one-shot 6 enters the second inputs of the elements of coincidence 2 and 8 and prohibits the passage of signals at the output of the pulse shaper 3 and the block 9. The same emuls sets the subject 14 and the reference 4 blocks to their initial state. the low frequency of the oscillations at the output of the signal generator 1 is reduced. If by the end of the pulse of the one-shot 6 this frequency has become lower than the limit frequency of the logical operation of the test electrode 14, then in block 9 the pulses begin to accumulate again and the oscillation frequency of the signal generator 1 increases until the current electronic unit 14 another failure will occur. If, on the end of the pulse: the one-shot 6, the oscillation frequency of the generator 1 is kept higher than the limit frequency of the logical operation of the test electronic unit 14, then the first pulses received at its input will cause a failure in this block, the comparison element 5 will start the one-shot 6, which again prohibits the passage of signals through the elements of coincidence 2 and 8. Maups, which caused a failure in the test electronic unit 14, will delay. live by delay element 7 and by the time the first of these pulses appears at the first input of the second, coincidence element 8, the inhibitory pulse of the one-oscillator 6 is already present at its second input, therefore block 9 continues to discharge. The discharge of block 9 will occur until the oscillation frequency of the signal generator 1 becomes less than the limit frequency of the logical operation of the electronic unit being tested 14. Then the whole cycle is repeated again. In the steady-state mode, the oscillation frequency of the generator 1 is stabilized with a predetermined accuracy near the limiting frequency of the logical operation of the test electronic unit 14 and is recorded by the indicator 10, for example, a frequency meter. The invention The device for determining the functioning of logic blocks, containing the general generator, signals, pulse shaper, the output of which is connected to the first terminal of the test block and to the first input of the master block, one-shot ,. the output of which is connected to the first input of the first matching element, the second matching element, an indicator, characterized in that, in order to automate the measurement process, a comparison element, a delay element and a control unit are added to it, the output of which is connected through the signal generator to the indicator input and to the second input of the first matching element, the output of which is connected to the input of the pulse former and to the input of the delay element, the output of the delay element is connected to the sherve input of the second matching element, second This input is connected to the one-shot output, to the second input of the reference block and to the second clip of the test block, the third clip of which is connected to the first input of the comparison element, the second input of which is connected to the output of the reference block, and the output of the comparison element is connected to the single-vibration input, while the output of the second match element is connected to the input of the control unit. Sources of information taken into account in the examination; 1, Bydanov B, B, etc. The input control device for triggers. - Ekb .: Exchange of experiments in the radio industry. M ,, 1975, vt. 1, s. 5O-51. 2., USSR Author's Certificate No. 396631, M. CL.SOSH 23/02, 01,02,72,