SU1429042A1 - Device for automatic selection of time-base generator operating conditions - Google Patents

Abstract

The invention relates to a pulse technique. The aim of the invention is to expand the range of frequencies while at the same time increasing the operability of selecting the operating mode of the sweep generator and simplifying the design. Counter 4 divides the frequency of the output signal of the generator 5 pulses. Moreover, by installing the switch 3 of the number code on the D-input of counter 4, it is possible to change the frequency of the generator of the sweep in the direct range. If there are syncc pulses on the bus 2 of the clock signal at the R inputs of counter 4 and trigger 6, a single signal occurs that keeps them in the zero state if the repetition period of the clock signal is less than the product of the period, the repetition of the signal from generator 5 by the division factor of counter 4 Introduction of the generator 5 pulses, trigger 6, counter 4 provides automatic selection of the standby or automatic operation of the device. In addition, the D-input of the trigger 6 is connected to the bus 7 logical I, 1 Il. § (L s

Description

 The invention relates to a pulse technique and can be used by IHO in the development of oscillographic equipment.

The aim of the invention is to expand the frequency range while simultaneously selecting the efficiency of the selection of the operating mode of the sweep generator and simplifying the design.

The drawing shows a structural diagram of the device for automatic selection of the operating mode of the sweep generator.

The diagram shows a sweep generator 1, a clock signal 2, a switch 3, a counter 4, a generator of 5 pulses, a trigger 6, a bus 7 of a logical unit.

The first input of the generator 1 of the scan is connected to the bus 2 of the clock signal, the second input is connected to the output of the switch 3, the C input of the counter 4 is connected to the output of the generator 5 pulses, R input with the bus 2 clock signal, D input with the output of the switch 3 and the output is with the C-input of the trigger 6, the D-input of which is connected to the bus 7 of the logical unit, the R-input to the bus 2 of the clock signal, the output to the third input of the generator 1 of the sweep.

The device automatically selects the operating mode of the sweep generator operates as follows.

The lack of a clock signal on bus 2 enables the operation of counter 4 via the C input, which receives a pulse signal from the generator of 3 pulses. Counter 4 has the ability to change the division ratio of the number and myco. The discrete setting of the dividing coefficient of the meter 4 is made at its D input using switch 3. The switch, setting the speed of the ramp generator 1 sweep, simultaneously sets the dividing ratio of the counter 4. With decreasing speed, the ramp voltage counter 4 increases and vice versa. The pulse signal from the output of counter 4 is fed to the C-input of trigger 6 and provides a census of logical 1 from the D input to the output. Logic 1 at the third input of the sweep generator 1 sets it to the self-oscillatory mode.

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The occurrence of clock pulses on bus 2 sets the R inputs 4 and the trigger 6 to the state O, which are held in this state if the repetition period of the sync signal is less than the product of the repetition period of the pulse signal from the generator 5 by the division factor 4 counters. Logic P at the third input sweep generator 1 puts it into standby mode and provides a sync pulse triggering on the first input. Generator D generates synchronized oscillations of a linearly varying voltage.

The loss of the clock signal on bus 2 enables the operation of counter 4 and trigger 6 via the C inputs. After a time equal to the product of the duration of the repetition period of the pulse signal from the generator 5 to the division ratio of the counter 4, the output of the trigger 6 will be set to 1 and the generator will go into self-oscillatory mode of operation. With an increase in the slew rate of the sawtooth voltage of the sweep generator 1, the switch 3 reduces the division ratio of the counter 4 and, accordingly, decreases the transition time of the generator 1 from the synchronized to the self-oscillatory mode.

Claims (1)

Invention Formula A device for automatic selection of the sweep generator operating mode, containing a sweep generator, the first input of which is connected to the clock signal bus, the second input - to the switch output, characterized in that, in order to expand the frequency range while simultaneously increasing the efficiency, a pulse generator, a trigger and the counter, with the C input of which is connected to the output of the pulse generator, R - input with the clock signal bus, D - input with the switch output, and the output with the C input of the trigger, the D input of which is connected to the logical bus e Init, R-input - to the bus clock, the output - to the third input of the timebase.