SU894846A1 - Synchronized pulse generator - Google Patents

Description

(54) SYNCHRONIZED PULSE GENERATOR

The device relates to radio engineering and can be applied in computing and impulse technology. A synchronized quartz pulsed resonator is a pulse generator that contains an inverter with negative feedback through a quartz resonator 1. However, this generator allows you to get only one pulse series. The closest technical solution to the proposed is a synchronized pulse generator containing a master oscillator and three single vibrators . At the output of the master oscillator, a first phase pulse is generated, which arrives at the first waiting one-shot. From the output of the first one-shot the second phase impulse is fed to the input of the second waiting one-shot. From the output of the second one-shot, the third-phase pulse is fed to the input of the third one-shot, ensuring the formation of a fourth-phase pulse. Thus, the formation of four phases 2 is ensured. The drawback of the device is the absence of an indication of the duration of the phases being formed for the period of a synchronizing signal, which necessitates a reduction in the frequency of the master oscillator, since a reserve is needed for the care of the duration of each pulse as the temperature, supply voltage and time vary. The purpose of the invention is to expand the range of synchronization frequencies by automatically adjusting the duration of the generated pulses within the period of the synchronizing signal. The target is achieved by the fact that in a synchronized pulse generator containing a master oscillator and two one-shot, moreover, the output of the first one-shot is connected to the input of the second one-shot, in. phase shaper deny, block of adjustment signal, block of adjustment of duration, paraphase amplifier, four key transistors,. a transistor and a capacitor, and the output of the master oscillator is connected through a capacitor to a third one. the input of the adjustment signal isolation unit / with the drain of the first key transistor, the gate of which is connected by the third output of the phase driver, and directly connected to the gate

the second transistor of a paraphase amplifier whose VELHOD is connected to the gate of the second key transistor, the drain of which is connected to the common connection point of the time of the elements of the first single vibrator, to the gate of the third key transistor, and the gate of the first transistor to paraphase amplifier is connected to the drain of the fourth key transistor the output of the first one-shot, besides connected to the first output of the block selection adjustment signal and through the pass-through transistor, the gate Wow is connected to the output of the second; one-shot, connected to the fourth output of the phase shaper, the first input of which is connected to the output of the first one-shot, to the drain of the third key transistor, to the first inputs of the adjusting signal selection unit and the tuning control unit, and the second input to the second inputs of the highlighting unit the signal of the regulator and the duration adjustment block whose output is connected to the gates, the time of the driving transistors of the first and second single-oscillators, and the third input of the duration adjusting block NOSTA connected to the output control signal extracting unit.

The drawing shows a diagram of the device.

The synchronized pulse generator contains a master oscillator 1, two single-oscillators 2 and 3 with time for the back of the elements: capacitors 4. and 5 and transistors 6 and 7; shaper 8 phase (block 9 selection of the adjustment signal, block 10 adjusting the duration, paraphase amplifier transistors 11 and 12, key transistors 13-16, pass transistor 17, capacitor 18,

The device works in the following way ..

Upon receipt of a negative synchronization pulse from the output of the master oscillator 1, transistor 12 sets a zero potential on the gate of transistor 16 and thereby removes the blocking from the time 3 of the circuit of the first one-oscillator 2. The charge of the capacitor 4 starts charging after the time of the setting transistor 6 and the first output pulse of the first one-shot 2, This pulse is fed to the input of the second one-shot 3, causing the formation of the first pulse of the second one-shot. During this period of time, the shaper 8 phases ensures the formation of phases from the impulses acting on it. The first impulse of the first one-shot one-shot in turn starts the first one-shot 2 and causes the formation of

the second pulse of the first one-shot. At the same time, a third phase pulse is formed on the phase driver 8, which, arriving at the gate of the key transistor 14, blocks the output of the oscillator 1, connected to the input of the adjustment extraction signal 9, and sets zero potential at its input. Simultaneously with the third phase impulse, it begins

g to form a fourth phase pulse. The second pulse again starts the second one-shot 3, causing the formation of the second pulse of the second one-shot, which, acting on the gate of the transistor 17, allows the passage to

5 gate of the transistor 11 negative potential from the output of the phase shaper. Since the gate of the transistor 12 at the time of existence of the third phase pulse is already installed

0 is zero potential, then a negative potential is set at the output of the paraphase amplifier, which, arriving at the gate of transistors 15. and 16, blocks the time of the close circuit and

5, the output of the first one-shot 2 prevents it from starting with the second pulse. In addition, the second pulse allows the negative potential to pass to the input of the extraction unit 9 for the homing signal, which ensures the formation of a negative potential at its output after the end of the second pulse. This potential is supplied to the duration adjustment unit 10, which produces a voltage inversely proportional to the time of the existence of a negative potential at the output of the adjustment signal extraction unit 9. This time is equal to the interval between the end of the second

0 pulse and the next clock pulse from the output is given a generator 1, which, arriving at the input of block 9 of the adjustment signal and the gate of transistor 12,

5 provides initial installation.

The longer the negative potential exists at the output of the adjustment signal extracting unit 9, the lower the voltage from the output of the duration adjustment unit to the gates is the time of the transistors of the single vibrators 2 and-3, causing an increase in the duration of the pulses and a decrease in the duration of the negative potential at the output of the unit

9 adjustment duration.

Thus, the formation of the phases is synchronized and their duration is linked to the period

a synchronizing signal with the trick of the oscillating generator 1, which can be used as a crystal oscillator, which ensures greater stability of the forming 1 st pulses of phases.

Claims (1)

Claim A synchronized pulse generator containing a master oscillator and two one-shot, and the output of the first one-shot is connected - 15 with the input of the second one-shot, so that in order to expand the range of synchronization frequencies, a shaper is introduced into it, .phase, regulator-20 Ki signal extraction unit, duration adjustment unit, paraphase amplifier, four key transistors, a capacitor and a bushing transistor, the output of the master oscillator being connected through a capacitor 25Ps to the third input of the isolation unit I have an adjustment signal with the drain of the first key transistor, the gate of which is connected to the third output of the phase shaper, and directly with the gate of the second transistor of the paraphase amplifier, the output of which is connected to the gate of the second key transistor, the drain of which is connected to the common connection point - * a vibrator, to the gate of the third key transistor, and the gate of the first transistor of the paraphase amplifier is connected to the drain of the fourth key transistor, the gate of which is it is output from the first one-shot, in addition, connected to the first output of the control signal separation unit and through a transistor, the gate of which is connected to the output of the second one-shot, is connected to the fourth output of the phase shaper, the first input of which is connected to the output of the first one-shot, with the drain of the third key a transistor, with the first inputs of the adjustment signal extraction unit and the duration adjustment unit, and the second input connected to the output of the second one-shot and to the second inputs of the signal allocation unit and the adjustment and 'the duration adjustment unit, the output of which is connected to the gates of the timing transistors of the first and second single vibrators, and the third input of the duration adjustment unit is connected to the output of the adjustment signal allocation unit.