SU1615862A1 - Pulse train shaper - Google Patents

Abstract

The invention can be used as test signals in digital radio systems. The aim of the invention is to improve the accuracy of the distribution law of the generated pulse sequences by reducing the discrete time offset of the generated sequences. To achieve the goal, counters 3, 4 pulses, trigger 11, decoder 8, pulse generator 16, AND 2 element, AND-OR-HE 14, inverter 15, setters 12, 13 codes are entered into the pulse sequence shaper. The pulse sequence generator also contains a pulse generator 1, counters 5, 6 pulses, multiplexer 7, triggers 9, 10. Counters 3, 5 pulses, multiplexer 7 and trigger 10 form the first channel of the formation of pulse sequences, and counters 4, 6 pulses, the decoder 8 and trigger 9 form the second channel of the formation of pulse sequences, the outputs of the channels of pulse sequences alternately arrive at the output bus of the driver. 1 il.

Description

- "

jupe

;

l js fn

I go.

\ / th

/

1L- J

The invention relates to a pulse technique and can be used as test signals in various digital radio systems.

The purpose of the invention is to improve the accuracy of the distribution law of the formed pulse sequences.

The drawing shows the functional diagram of the pulse shaper sequence.

Pulse sequence generator contains 1 pulse generator, element 2, counters 3-6 pulses, multiplexer 7, decoder 8, triggers 9-11, sensors 12 and 13 codes, AND-OR-HE element 14, inverter 15, driver 16 .

The output of the generator 1 through the element 2 is connected to the counting inputs of counters 3 and 4, the overflow outputs of which are respectively connected to the counting inputs of the third 5 and fourth 6 meters, the outputs of which are connected to the control inputs of the multiplexer 7 and the decoder 8, the outputs of which are respectively connected to the first inputs of the AND-OR-HE 14 element, the output of which is the device output, the output of the decoder 8 is connected to the counting input of the trigger 9, the direct and inverse outputs of which are respectively connected to the second inputs The elements AND-OR-NOT 14, the output of the counter 5 is connected to the counting input of trigger 10, the dials 12 and 13 of the codes are respectively connected to the preset inputs of counters 4 and 6, the inputs of which are preset Recording are combined with the S-inputs of the trigger 9 and 11 and connected to the driver 16 and the input of the inverter 15, the output of which is connected to the R inputs of counters 3 and 5, the driver 16 is connected to the R input of a trigger 11, the direct output of which is connected to the second input of the AND 2 element, the S and R inputs of the trigger 10 are connected to tires external control signals.

The pulse shaper works as follows.

The Start command 16, consisting of the Start and Stop buttons and the pulse generator, generates a short negative polarity pulse, which sets the counted conversion factor on the 4 and € counters, sets the triggers 9 and 11 to state 1, and also through the inverter 15 zeroes counters 3 and 5. Trigger 11 opens element I 2 to pass a pulse sequence from generator 1 to counting inputs of counters 3 and 4. At the overflow outputs of these counters, pulsed ones are formed

sequences with a frequency equal to 1/10 of the oscillator 1 frequency, shifted in phase one relative to another by an amount determined by the recalculation coefficient of counter 4. The sequence of pulses from the output of counter 3 is fed through counter 5 to the inputs of multiplexer 7 and trigger 10, the output of which is formed the pulse sequence is equivalent to a sequence of zeros,

units or sequence of the 1-01-0 type, depending on the state of the trigger 10,

which is determined by the external installation.

From the output of the counter 4, the sequence of pulses goes through the serially connected counter 6 and the decoder 8 to the input of the trigger 9, at the output of which a sequence of zeros is formed, shifted in phase relative to the sequence from the output of the trigger 10 by the value determined by the conversion factors of counters 4 and 6, and the counter 4 forms a phase shift with a frequency resolution of the generator 1, and a counter b - with a resolution of 1/10 of the frequency of the same generator. The pulses from the outputs of the flip-flops 10 and 9 pass through the output of the device through the AND-OR-NOT 14 element alternately, and the sequence of the pulses is determined by the operation of the flip-flop 9 turned on in the counting mode and controlled by the pulses coming from the decoder 8.

In the proposed former, the counters are 3.5; multiplexer 7 and trigger 10 form the first channel of the formation of pulse sequences, and counters 4,6, decoder 8 and trigger 9 form the second channel of the formation of pulses, the outputs of each channel of the formation arrive at the output of the driver alternately. Thus, alternating pulse sequences are formed at the output of the imager with a precise and adjustable time shift between

alternating pulses, the regulation of which is set by the setting units of 12 and 13 codes and external control signals.

Claims (1)

Claim pulse shaper comprising a pulse generator, first and second pulse counters, first and second triggers, and a multiplexer, the control inputs of which are connected to the outputs of the first pulse counter, characterized in that, in order to improve the accuracy of the distribution law of the generated pulse sequences, the first and second pulse adjusters, pulse shaper, third trigger, I element, inverter, third and fourth pulse counters, decoder, and ele The AND-OR-NOT, the output of which is connected to the output bus, the first input of the AND-OR-NOT element is connected to the output of the multiplexer, the second input is connected to the output of the decoder and to the counting input of the first trigger, the direct and inverse outputs of which are connected respectively to the third and fourth inputs of the element AND-OR-NOT, and the output of the pulse generator is connected to the first input of the element AND, the output of which is connected to the counting inputs of the third and fourth pulse counters, the overflow outputs of which are connected to the counting inputs of the first and torogo pulse counters, the outputs of the latter being connected to the control inputs of the decoder, the first pulse counter is connected to output counting input of the second trigger, and the preset inputs of the second and fourth pulse counters are connected to the outputs of the first and second code sets, inputs Recording the presets of the second and fourth pulse counters are interconnected and connected to the S inputs of the first and third triggers, to the first output of the pulse former 11 through an inverter with R-inputs of the first and third pulse counters, the R-input of the third trigger is connected to the second output of the pulse former, the output of the third trigger is connected to the second input of the element A and inverted outputs of the first and second flip-flops are connected to their D-inputs, a direct output of the second flip-flop is connected to the multiplexer Informational onnym.vhodam and S- and R-BXO- rows of the second flip-flop are connected with the tire external control signals.