SU1667233A1 - Device for pulse deletion and insertion - Google Patents

Abstract

The invention relates to a pulse technique and radio engineering and can be used to create devices for forming a pulse sequence with discrete phase or frequency control. The purpose of the invention is to expand the frequency range of the output pulses. The device for the subtraction and addition of pulses contains a pulse distributor 1, a bus 2 for inputting reference pulses, a first trigger 3, a second trigger 4, a first element AND 5, an element OR 6, a second element And 7, a third trigger 8, a bus 9 for introducing correction pulses. A bus 10 of control, a driver of 11 gates of corrective pulses and an adder 12 modulo two are inserted into the device, which allows to obtain at the output of the device a sequence of no pulses up to a sequence with a pulse frequency equal to twice the pulse frequency in the reference sequence. 2 Il.

Description

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The invention relates to a pulse technique and radio engineering and can be used to create devices for forming a pulse sequence with discrete phase or frequency control.

The aim of the invention is to expand the range of output pulse frequency,

FIG. 1 shows a block diagram of a device for subtracting and adding pulses; in fig. 2 - time diagrams of his work.

A device for subtracting and adding a pulse distributor 1, a bus 2 for inputting reference pulses, a first trigger 3, a second trigger 4, a first element AND 5, an element OR 6, a second element And 7, a third trigger 8, a bus 9 for inputting corrective pulses, a bus 10 control, driver 11 gates of corrective pulses, adder 12 modulo two.

In the device for the subtraction and addition of pulses, the input of the pulse distributor 1 is connected to the bus 2 of the input pulse pulses, one output of the pulse distributor 1 is connected to the counting inputs of the first and third triggers 3 and 8, and the first input of the driver 11 gates of correction pulses, the second output of the pulse distributor 1 is connected with the counting input of the second trigger 4, the information input of which is connected to the control bus 10, the non-inverting output of the second trigger 4 is connected to the first input of the first element And 5, invertible the output is with the first input of the second element AND 7, the outputs of the first and second elements AND 5 and 7 are connected to the inputs of the element OR 6, the output of which is the output of the device, the non-inverted output of the first trigger 3 is connected to the first input of modulator 12 modulo two, the second input which is connected to the output of the driver 11 gates corrective pulses, the second input of which is connected to the bus 9 input correction pulses, the output of the adder 12 modulo two connected to the second input of the first element And 5 and the information input of the third trigger 8, non-inverted output of which is connected to the second input of the second element And 7.

A device for subtracting and adding pulses operates as follows.

The input reference sequence with the frequency Fon is fed to the distributor 1 pulses. At one of the outputs of the pulse distributor, a sequence with a frequency of 2Fon with the phase O is obtained; at the other output, an inverted sequence is obtained with a frequency of 2F0n. A sequence with a frequency of 2F0n and a phase O is fed to the counting input of the first trigger 3, from the output of which the signal with a frequency of F0n, the phase of which is connected to the decay of pulses in a sequence with a frequency of 2F0n

0 and phase 0 °, is fed to the first input of the adder 12 modulo two. To the second input of the modulo two adder, corrective pulses of Tcor.iml duration are received. 1 / 2F0n from the shaper output

5 11 corrective pulse strobes. Corrective pulses are sent to the first input of the gates of corrective impulses, and to the second input is a signal with a frequency of 2F0n and phase O from the output

0 pulse distributor. At the output of the corrector impulse gate generator, gates of the same duration Tcor. Im. Are obtained. 1 / 2F0n (regardless of the duration of the input correction pulse), the fronts of which are attached to the fronts of the pulses in a sequence with a frequency of 2F0n and a phase of 0 °.

At the output of the adder 12 modulo two, performed according to the scheme EXCLUSIVE 0, the signal is received with a frequency of Fon + Pkor.imp., I.e. this output can be used if only the addition of pulses is required. The signal from the output of the modulo two is fed to the D-input of the third of its trigger 8, the counting input of which receives a signal with a frequency of 2F0n and phase O from the output of the pulse distributor. Due to the fact that the D-trigger is triggered only on the edges of pulses in a sequence with a frequency of 2F0n and does not respond to changes in the signal at the D input at another time, the output of the third trigger receives a signal with a frequency

Fon Ror.imp., Ie THIS OUTPUT CAN BE US5 if only pulse subtraction is required. The signal from the output of the third trigger is fed to one of the inputs of the second element And 7, the other input of which is inverted

0 the control signal from the inverted output of the second trigger 4, the ne-D input of which receives the control signal, and the counting input the signal c. frequency 2F0n and phase 180 °. At the output of the second trigger

5, a control signal is obtained, the phase of which is connected to the pulse decay in a sequence with a frequency of 2p and a phase of 0 °. This assignment is made so that when the control signal changes, there will be no additional imputations. From the non-inverted output of the second trigger, the signal arrives at one of the inputs of the first element I 5, the second input of which receives a signal from the output of the modulo two. Thus, at the output of the first element I there will be a signal with a frequency of Fon + Pkor.imp., And at the output of the second element I there is no signal if there is a high potential on the control bus, if there is a low potential on the control bus at the output of the first element I and the output of the second element And there will be a signal with frequency F0n - Рcor imp Imp signals from the outputs of the first and second elements AND are fed to the inputs of the OR element, the output of which is the output of the device.

FIG. 2 shows the timing diagram of the device. Diagram a) shows a sequence of reference pulses with a frequency F0n; in diagram b) and c), sequences with a frequency of 2F0n are obtained at the output of the pulse distributor; in diagram d), a sequence of corrective pulses with a frequency Pc. imp .; on diagram d) - the sequence of gates of corrective pulses at the output of the generator of the gates of corrective pulses; on the chart

g) —sequence with frequency F0n at the output of the first trigger 3; on the chart

h) —sequence with frequency F0n + + Pk.imp. at the output of the adder 12 modulo two; on the diagram and) - the sequence with the frequency F0n - Rkor.imp. at the output of the third trigger 8; in diagram k), a control signal on control bus 10; in diagram 1) the control signal at the output of the second trigger 4; in the diagram m), the sequence with the frequency Pout at the output of the element OR 6.

At the output of the device, limit sequences can be obtained from the complete absence of pulses to a sequence with a pulse repetition rate equal to twice the following frequency.

pulses in the reference sequence, which is twice the maximum pulse frequency of the output sequence in the prototype.

Claims (1)

The invention of the device for the subtraction and addition of pulses, containing a pulse distributor connected by input to the bus input reference pulses, the first and second outputs of the pulse distributor are connected, respectively, with the clock inputs of the first and second flip-flops, non-inverted output of the second flip-flop connected to the first input of the first element AND connected by the output to the first input of the OR element, the second input of which is connected to the output of the second element AND, the output of the OR element is connected to the output of the device, the third trigger, the input pulse of the correction pulses and the control bus, is due to the fact that, in order to expand the frequency range of the output pulses, into it the shaper of correction gates and modulo two modulator are entered, the first output of the pulse distributor is connected to the clock input of the third trigger and the first the input of the Former of the gates of the corrective pulses, the second input of which is connected to the bus for the input of the corrective impulse the first input of the modulo two adder, the second input of which is connected to the noninvertible output of the first trigger, the output of the modulo two adder is connected to the second input of the first element I and information input of the third trigger, non-inverted output of which is connected to the first input of the second element And, the second input of which is connected to the inverted output of the second trigger. whose information input is connected to the control bus. R d WITH