SU1257603A1 - Device for determining standard pulse generation time - Google Patents

Abstract

The invention can be used in the development of spectrometrical time interval meters. The purpose of the invention is to expand the dynamic range of the amplitudes of the input pulses and improve accuracy. The device contains discriminators 1 and 2 of the lower and upper levels of the signal, a sawtooth voltage generator 3, delay lines 4 and 11, a discriminator level 5, a generator of 6 standard pulses, a trigger 7 and an expander 8 pulses. To achieve this goal, voltage dividers 9 and 10 (linear) are introduced into the device to form connections with the elements of the device. 1 il. Sp about

Description

The invention relates to a pulse technique and can be used in the development of spectrometric time interval meters.

The aim of the invention is to expand the dynamic range of the amplitude of the input pulses and improve the accuracy in determining the moment of formation of the standard pulse.

The drawing shows an electrical block diagram of a device for determining the instant of formation of a standard pulse.

The device for determining the moment of formation of a standard pulse contains discriminators 1 and 2 of the lower and upper levels of the signal, respectively, a sawtooth voltage generator 3 (with an adjustable amplification rate), a delay line 4, a discriminator level 5, a generator of 6 standard pulses, a trigger 7, the expander 8 pulses, voltage dividers 9 and 10 (linear), delay line 11, input bus 12 connected to the expander 8 input and delay line 4, the output of which is connected to the first inputs of discriminators 1 and 2, sec e whose inputs through dividers 9 and 10 are connected to the output of the expander 8, the outputs of discriminators 1 and 2 via Post-Consequently, the connected generator 3 and the delay line 11 are connected to the first input of the discriminator 5, the output of which through the generator 6 is connected to the first input of the trigger 7, the second the input of which is connected to the output of the discriminator 2, the output of the trigger 7 is connected to the second input of the discriminator 5. A device for determining the moment of formation of a standard pulse

works as follows 1

Signals sent to bus 12

the devices are expanded by the expander 8 pulses and through dividers 9 and 10 are fed to the corresponding inputs of the discriminators 2 and 1 of the upper and lower levels. The dividers 9 and 10 are the usual voltage dividers, each of which consists of two resistors. The input signals through the 4 delay line is fed to the inputs of the discriminator 2 and 1 of the upper and lower levels. Electric line length 4 delay, dd is chosen equal to the maximum duration of the leading edge of the input signals. AT

five

0

five

Claims (1)

the time when the amplitude of the useful signal reaches the lower threshold level, at the output of the discriminator 1 a signal is generated, on the front of which a generator 3 of the saw-tooth voltage is triggered with an adjustable amplitude rate. On the front of the pulse formed by the discriminator 2 of the upper level, the rate of increase of the sawtooth voltage is halved, the trigger 7 switches to one state and the unlock potential arrives at the control input of the level discriminator 5. In this case, the sawtooth voltage through the delay line 11 is fed to the input of the level 5 discriminator. Discrete detector 5 records the point in time when the amplitude of the linearly varying voltage reaches the response threshold. At the output of the generator 6 standard pulses, a signal is generated standard in amplitude and duration, and on the front of the last trigger 7 returns to the initial state and blocks the level 5 discriminator. Invention Formula A device for determining the moment of formation of a standard pulse containing a pulse expander and the first delay line, whose inputs are combined and connected to the input bus, the output of the first delay line is connected to the first inputs of the upper and lower discriminators, the outputs of which are through series-connected sawtooth generator the second delay line is connected to the first input of the level discriminator, the output of which is connected to the first input of the trigger via the standard pulse generator, and Its input is connected to the output of the upper-level discriminator, and the trigger output is connected to the second input of the level discriminator, characterized in that, to expand the dynamic range of the amplitude of the input pulses and increase the accuracy, the first and second voltage dividers are entered into it, the outputs of which are respectively connected to the second inputs of the discriminators of the upper and lower levels, and the inputs of the first and second voltage dividers are combined and connected to the output of the pulse expander. 0 five 0 five 0