SU1358076A1 - Pulse shaper - Google Patents

Abstract

The invention relates to radio engineering and can be used to form pulse sequences with adjustable duty cycle and phase shift. The purpose of the inventive shadow is to expand the functionality by adjusting the duty ratio of the pulses of the output signal with an independent change in the temporal position of the front and rear edges of the pulses. The pulse shaper contains amplifier-limiter 1, inverter 2, integrator reset units 3, integrators 5-7, comparators 8-10, constant reference voltage source 11, control voltage sources 12 and 13, and differential circuits 14, 15, EC-flip-flop 16 and switch 17. Amplifier-limiter 1 converts a sinusoidal voltage into square wave pulses. Depending on the position of the switch 17, the control input of the integrator 7 receives a signal from the amplifier I limiter directly or through the inverter 2. The integrators 5-7 integrate the constant voltage coming from the source P. The integrators 5, 6 form sawtooth input frequency, but out of phase relative to each other. At the output of the device are formed im. pulses, the phase shift of which is regulated within 0-360 ° C; the voltage change of the PDI 13, and the duty ratio is determined by the position of the switch 17 and the voltage value of the PDI 12. 3 Il. s (l

Description

The invention relates to radio engineering and can be used to form pulse sequences with adjustable duty cycle and phase shift.

The purpose of the invention is to expand the functionality by adjusting the duty ratio of the output pulses with an independent change in the temporal position of the front and rear edges of the pulses.

FIG. Figure 1 shows the functionality of an electrical driver for pulse mapping; in fig. 2 and 3 are time diagrams, in order to explain its operation for cases when the output signal well voltage is greater and less than the duty cycle of the input signal, respectively, for the same phase shift

The pulse shaper contains amplifier-limiter 1, inverter 2, blocks 3 and 4, reset integrators, integrators 5 and 6 and additional integrator 7, comparators 8 and 9 and additional comparator 10, constant-voltage source 11, additional control-voltage source 12 and a control voltage source 13, differentiating the circuits 14 and 15, the RS flip-flop 16 and the switch 17.

The pulse shaper operates as follows.

The sinusoidal voltage input to the input of the pulse former is converted by the amplifier-limiter 1 into rectangular-shaped pulses (Fig. 2a, b and Za, b). From the leading edge of the pulse signal, the reset unit 3 generates a reset signal for the integrator 5, the output voltage of which has a saw-tooth shape (Fig. 2c and Sv). Depending on the position of the switch 17, the control input of the additional integrator 7 is outputted directly from the output of the amplifier limiter 1 or inverted from the output of the inverter 2. During the time that the signal level is high, the additional integrator 7 is in a weak state, and the voltage its output is zero, B, during the action of a low signal level, the input voltage is integrated and the output voltage rises (Fig. 2g and Zg). The signal from the output of the additional integrato ra 7 is compared to voltage

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Additional source 12 of the control voltage on the additional comparator 10, the output of which is connected to the input of the second reset 4, which generates the reset pulses corresponding to the leading edge, and resets the integrator 6 (Fig. 2d and Bottom). The integrators 5 and 6 and the additional integrator 7 integrate the DC voltage supplied from the DC source 11 (Fig. 2c, d, d and Sv, d, d). At the output of integrators 5 and 6, sawtooth voltages are formed with a frequency equal to the frequency of the input signal, but shifted in. phase relative to each other by an amount proportional to the voltage of the additional source 12 of the control voltage. The saw voltage across the comparators 8 and 9 is compared with the voltage of the source 13 of the constant control voltage of 5 times (Fig. 2c, d, and Sv, d), in

moments of sawtooth and control voltages, the differentiation circuits 14 h 15 form pulses (Fig. 2e, g and Ze, g), one of which sets the RS flip-flop 16 to state 1, and the other drops to O (Fig. 2h and 3), and at the output of the RS flip-flop 16 pulses are generated.

The pulse shaper produces pulses whose phase shift is controlled between 0-360 by varying the voltage of the source 13 of the control voltage with a duty cycle determined by the position of the switch 17 and the magnitude of the voltage of the source. 12 control voltage.

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Claims (1)

Formula from the acquisition of a pulse shaper, containing the amplifier-limiter, the input to 45 of which is the input of the pulse generator, and the output is connected to the input of the inverter, two channels of signal processing, each of which is made in the form of a sequentially connected inverter, comparator, and a differentiating circuit, the second inputs of the comparators are connected to the control voltage source, the circuits of the first and second channels of signal processing are connected respectively to the R and S inputs of the RS flip-flop, the first and second integrator reset units, whose outputs are connected to the control inputs of the integrat The first and second signal processing channels, respectively, the inputs of the integrators are connected to a source of constant reference voltage j the input of the first reset unit is connected to the output of the limiting amplifier, characterized in that, in order to extend the functionality signal, a series-connected additional integrator and comparator are introduced, an additional source of control voltage and a switch, the first and second inputs of which are connected to the output The amplifier and the inverter are respectively, and the switch output is connected to the control input of an additional integrator, whose input is connected to a constant voltage source, the second input of the additional comparator is connected to an additional control voltage source, and second reset unit. "" miz.2.