SU585456A1 - Digital ratio-frequency pulsed phase-meter with constant measuring time interval - Google Patents

Description

one

The invention relates to radio mortar engineering and can be used in radio receivers of phase radar and radio navigation.

Known phase meter with a digital readout, containing amplifiers-limiters, formers, a generator of counting pulses, a frequency divider, keys, in which the measurement of the difference F; carried out over time

A disadvantage of the known phase meter is the measurement of the phase difference only between continuous signals.

There is a known .s phase meter with a constant measuring time, containing amplifiers-limiters, drivers, counting pulses, a frequency divider, triggers, a coincidence unit, and a timing time for a C2 coincidence unit.

The disadvantage of this phase meter is the impossibility of measuring the phase inter-pulse signal with a given accuracy.

The aim of the invention is to make it possible to measure the phase difference between two intermittent signalings. This is achieved in that the known device containing the first and

the second limiting amplifiers are sequentially connected respectively to the first and second formers, the measuring trigger, whose inputs are connected respectively to the outputs of the first and second formers, and the output through a series-connected match block and time, the driving block matching the pulse counter, the frequency divider and the trigger connected sequentially, the input of the frequency divider is connected to the second input of the match block, and the output of the trigger to the second input is the time of the master match block, and the generator even-numbered pulses, introduced the first and second amplitude detectors and the key unit, wherein vyhody..lere.ogo. and the second limiting amplifiers, respectively, through the first and second amplitude detectors are connected to the first and second inputs of the key block, and its third input is connected to the counting pulse generator, while the output of the key block is connected to the second input of the coincidence block.

Claims (2)

The drawing shows a block diagram of a DIGITAL phase meter of radio pulse signals. The device contains the first and second limiters 1 and 2, the first VtroA (rovatel 3 and 4, trn ger 5, block coincidence block b, flea 7 matching time, trigger 8, counting pulse generator 9, key block 10, frequency divider II, the pulse counter 12 and the primary 1 and the second amplitude detectors 13 and 14. The phase meter works as follows. The input radio pulse signals QI and obtained by limiting the output of the limiting amplifiers 1, 2 are fed to the formers 3, 4, which produce x-pulse pulses corresponding to the moment 1m. transition and through the zero value of the input signals with a positive sign of the derivative, these pulses are fed to the input of the measuring 5, the output voltages Ilg of which are fed to the coincidence unit of the counting pulses 6. The input signals MI and U) are detected by the amplitude detectors 13 and 14 and are stressed at the output C .and respectively, the key block is matched 10, to the third input of which pulses are delivered from the generator of the counting and 1 pulses 9. At the moment of coincidence, the key block 10 generates bursts of pulses. Counting pulses-Uij from key block 10 arrive at a block of coincident counting pulses 6 and frequency divider 11. As the counting pulses from block 10 are received intermittently at the frequency divider, the pulse from the frequency divider increases in duration. Phase pulses, the duration of which is proportional to the phase difference, on the coincidence block 6 are filled with counting pulses and for a time interval are applied to the counting pulses 12 through the timing of the matching block 7. Since the actual measurement time is determined by the total time of the counting pulses through the key block 10, then choosing the division factor equal to 3b-10, where I is an integer, the number of pulses counted by the counter for a constant measurement time will be proportional to the phase difference between the input radio signals. If the input signals of a sinusoidal forfill, the constant voltage at the output of the amplitude detectors 13 and 14, open the key unit 10 and the phasometer operates as usual, with a change time dialed non-discrete during the overlap, but continuously. Thus, the device has wider application than conventional phase meters, since it additionally allows to measure the phase difference between two rf signals and the phase difference between the radio pulse signal and the reference sinusoidal signal. DETAILED DESCRIPTION OF THE INVENTION A digital radio pulse phase meter with a constant measuring time, comprising first and second limiting amplifiers connected in series with the first and second formers, a measuring trigger whose inputs are connected to the outputs of the first and second formers, and the output through the sequentially connected block and the time setting a coincidence unit with a pulse counter, a frequency divider and a trigger connected in series, the input of a frequency divider connected to the second input match point, and the trigger output to the second input is the timing of the master block, and a counting pulse generator, characterized in that, in order to make it possible to measure, the phase difference between two discontinuous signals, it is equipped with first and second amplitude detectors and a key block, the outputs of the first and second amplifiers of the limiters, respectively, through the first and second amplitude detectors are connected to the first and second inputs of the key unit, and its third input is connected to the counting pulse generator, the output of the key block is connected to the second input of the block cor-: falling. Sources of information taken into account in expert opinion: 1. Author's certificate of the USSR 192932, cl. G 01R25 / 00, 1965. 2. Authors certificate of the USSR 123617, cl. & 01L.25 / 00, 1963.