SU571774A1 - Device for measuring dynamic parameters of electronic modules - Google Patents

Description

with an inverting circuit, the voltage discriminator 1 should not invert the signal in the other, and if the subject is alemae- nine inverter circuit, the drive | voltage regulator should be inverting.

Thus, at time i, the voltage discriminator is triggered and outputs a positive voltage pulse (log. 1) to the input of the test element, and the output voltage of the test element begins to decrease to the level O.

For normal operation of the device, it is necessary that & pulse width c., A voltage discriminator that operates in a single-vibration mode, is greater than the duration of the dynamic parameter to be measured. At time point -fe, the output voltage of the voltage detector is equal to The output element of the test element starts moving from the log O to log 1, and the process of forming the period is repeated.

From the cited in FIG. 2 time diagrams show that the following period

ring generator, t,

Och 2

i, is the time from the beginning of the leading edge of the test element to the moment of comparison of the output voltage of the test element with Upn t

I is the pulse duration at the output of the voltage discriminator.

The share of useful information in the general period of the ring oscillator in this device is much greater than in the known. Consequently, the accuracy of the proposed device is significantly higher.

The leading edge is measured in two cycles. In the first cycle, the following period is determined for the ring oscillator, which gives information about the rise time of the output voltage of the test element 3 from the beginning of the front to the comparison of the output voltage with -op and the output impedance duration voltage discriminator 1. In the second cycle, at the output of the source of reference actions 2 set the bw uq, the follow-up period of the generator of the generator, which carries information about the time of the output voltage of the test element, is measured nt from the beginning of the front to

comparing the output voltage with (, and the pulse duration at the output of the voltage discriminator.

 The difference of these two periods is equal to the length of the front of the output voltage of the test element at the site,. u and u

The process of forming a pulse sequence in the measurement of the rear edge and the measurement process itself occurs as described previously. The only difference is that in this case the voltage discriminator is configured to work on the falling edge of the output voltage of the test element.

Using the device, it is also possible to successfully measure the switching delay time along the leading and trailing edges, since the pulse duration at the output of the voltage discriminator can always be determined by any other devices. The delay time in this case is determined from the expression

where T is the period following the ring generator;

t, is the pulse duration at the output of the voltage discriminator.

Thus, this device with the mesh composition of nodes solves the same, as well-known, functional tasks, i.e., it is more familiar than the known device.

In addition, the share of useful information in the general period of the following, the ring oscillator in this device is much larger than in the known one, which causes a higher measurement accuracy.

Claims (1)

1. USSR Author's Certificate No. 432431, & O1.-R 31/28, 07.24.72. ffi. en .  tn .3