SU864542A1 - Phase-to-code converter - Google Patents

Description

one

The invention relates to electrical measuring equipment and can be used to monitor and measure the phase in various electronic devices.

Devices are known for converting the phase of a radio signal into a digital code, used in electronic equipment for monitoring and measuring the phase shift of two radio signals C.

The closest in technical essence to the present invention is a device comprising a master oscillator, a phase modulator, a clock pulse generator, a modulator, a pump generator and p-bit cells, each of which includes a measuring parametric oscillator mixers (phase doublers) and corrective phase shifter 2.

The disadvantages of the known device are low sensitivity and low accuracy when converting the phase of wideband signals. Mala sensitivity transform, l due to the presence of a phase modulator, multiplier, mixer and corrective phase shifter, which degrade the signal / noise ratio

at the input of the measuring parametric generator. In this converter, when passing the converted signal sequentially through,

 the chain of mixers (phase doublers) expands the spectrum of this signal by a factor of 2, where n is the number of discharge cells. Since the mixers are narrowband devices, the spectrum of the signal to be converted is limited, orbital in the lower bits of the converter, which entails the occurrence of large dynamic errors.

The purpose of the invention is to increase the sensitivity and accuracy of the phase conversion of wideband signals. The goal is achieved by

20 that a phase-to-code converter, comprising a pump generator and p - bit cells, each of which includes a first measurement parametric generator and a mixer, is inserted into the first bit

cell additionally measuring and two reference parametric oscillators, two keys, two phase detectors and two triggers, and the rest

30 bit cells - one reference parametric generator, one phase detector, one three geers and two keys, In the first bit cell, the first output of the pump generator is simultaneously connected to the input of the first measuring parametric generator and through the first reference parametric generator to the first input of the first phase detector, and the second output of the pump generator. - to the input of the second measuring parametric generator and through the second reference parametric generator to the first input of the phase detector. The direct and inverse outputs of the first and second measuring parametric oscillators are connected to the inputs of the first and second switches, and the direct output of the first measuring parametric generator is connected to the second input of the second phase detector, and the inverse output of the second measuring parametric generator to the second input of the second phase detector. The outputs of the first and second phase detectors are connected to the inputs of the first and second triggers, respectively, the inverse outputs of which are connected to the control inputs of the first and second keys, respectively. The outputs of the keys are connected to the inputs of the mixer, the outputs of which are connected to the inputs of the measuring and reference parametric generators of the subsequent bit cell. In the other bit cells, made identically, the forward and intensive outputs of the measuring parametric generator are connected to the first inputs of the first and second keys, respectively, the outputs which are connected to the mixer inputs, and the output of the reference parametric generator is connected to the first input of the phase detector, to the second input of which is connected Direct output of the measuring parametric generator. The output of the phase detector, in turn, is connected to the trigger input, the inverse output of which is connected to the key control inputs. In each subsequent bit cell, the second inputs of the first and second keys are connected respectively to the outputs of the first and second keys of the previous bit cell. The inputs of the parametric measuring generators of all bit cells are combined and connected to the input bus, with the trigger outputs connected to the output buses.

Figure 1 shows the block diagrams of the converter phase-code; Fig, 2 phase plane measuring parametric oscillators,

The phase-to-code converter includes a pump generator 3 and a spreading cell. The first bit cell contains the first 2 and second. 3 measuring parametric electrodes, the first 4 and second 5 reference parametric oscillators, the first phase detector b and the second phase detector /, the first 8 and second 9 triggers, 10 and the second 11 keys and mixer 12, Bit cells, starting from the second and to n th, identical built and each of them, for example, the second cell, contains a measuring 13-1 and supporting 14-1 parametric generators, phase detector 15-1, trigger 16-1 first 17-1 and second 18-1 keys and mixer 19- one.

It is known that the phase plane of a parametric generator is divided by a separatrix into two regions of attraction corresponding to two values of phasic 12 and H + 180 ° stationary oscillations of subharmonics. The pumping phase is here.

In accordance with this, the principle of operation of each converter bit is to determine the half-plane that owns the vector of the signal being converted, to generate an output code for the sign of this half-plane and to form a pump voltage for the next bit with a phase such that the separatrix of the parametric measuring generator of the subsequent discharge will divide the sector phase plane defined in this and previous bits in half.

Claims (2)

The converted signal is applied to measuring parametric generators of all discharge cells in parallel. At the initial time, the pump voltage from the first output of the pump 1 is fed to the inputs of the first measuring 2 and first reference 4 parametric generators, and the first reference parametric generator always excites the same the phase of the subharmonic oscillations, which is rigidly connected with the phase of the pump generator, the phase of the subharmonics of the first measuring parametric oscillator fn / S or iff) 2+ 180 depends on phase of the converted signal, t, e. from the position of the vector of the converted signal on the phase plane of the parametric measuring generator. The first phase detector 6 compares the phases of the subharmonic oscillations of the first reference 4 and first measuring 2 parametric oscillators, the first trigger 8 generates an output: the first discharge signal | has a high potential at the output of which corresponds, for example, to the subharmonic phase% | a, a low -% | 2 + 180 °. Since, on the second, the measurement and the second support are parametric generators 3 and 5 (second discharge) in. Since the pump generator 1 produces an antiphase pumping voltage, then the segrethrisa on the phase plane of these parametric generators is rotated with respect to the separatrix of the first measuring and reference parametric generators 2 and 4 at an angle of 90. This way the first and second bits of the transducer body allow determine the position of the vector of the transformed wave, up to a square, each of which corresponds to a specific code on the output busbars and a code corresponding to a specific quadrant, falls with the trigger and 9 to the control inputs of the keys 10 and 1 I who select the necessary phases of subharmonic voltages taken from the direct and inverse measuring first parametric oscillators 2 and 3. From the outputs of the keys 10 and 11 the subharmonic voltage with selected phases is supplied the mixer 12, the output of which is allocated, is the total signal. This signal with the pumping frequency and phase 90 or 270 (depending on the phase of the signal being converted) is fed to parametric oscillators 13-1 (measuring) and 14-1 (reference) tert its transducer bit. The rice separator of these parametric generators is rotated with respect to the separatrix of the first-order parametric generator at an angle of 135 or 45. Phase detector 15-1 compares the phases of the subharmonic oscillations from the direct outputs of parametric generators 13-1 and 14-1, and the trigger 16 -1 produces the third bit output signal (and .... The first second and third bits give the opportunity to determine the position of the vector of the converted signal with an accuracy of octant, each of which corresponds to a specific code on the output lines ox converter transducer (r – K ° D corresponding to the selected half-plane of the measuring parametric generator 13-1 is fed to the control input of the keys 17-1 and 18-1. At the outputs of the key 17-1, there may be a sub-harmonic voltage with phases O or 180 from the key 10. and from one of the Phases 45 ° 225 °, 135, the direct output of the measuring parametric generator 13-1, and at the inputs of the key 18-1 the output of the key 10 and one 225, 45, 315 °, 135 s inver Clear output of measuring parametric generator 13-1. From the outputs of the keys 17-1 and 18-1, the voltage of the subharmonic with the selected phases is supplied to the mixer 19-1, the output of which is allocated the total signal from one of the possible phases - 45 135.225, 315. The remaining bits of I Conversion work in a similar way. For example, FIG. G shows the phase plane of parametric measuring oscillators for six transducer bits at the phase of the converted signal tf 24, where the solid vectors mark the pump vectors of the corresponding bits (denoted by digits), and the dash-dot vectors of the subharmonics of the parametric oscillators of the corresponding bits ( the numbers are placed on the vectors of the corresponding direct outputs of parametric oscillators). For this case, the table of states of the transformer ramps is also given, in which Q is the outputs of the flip-flops of the corresponding bits connected to the output buses and are the outputs of the flip-flops; connected to the control inputs of the corresponding keys, in this table, low control potentials (Q - (0)) supply lm to the control key inputs, corresponding to the selection of the upper inputs of these keys in FIG. 1, and to the high potentials the lower ones according to the inputs keys, the use of new elements of the second measuring and two reference parametric generators, two keys, two phase detectors and two triggers in the first bit cell, as well as one reference parametric generator, phase detector, trigger and d The keys in each subsequent bit cell favorably distinguish the proposed phase-to-code converter known for sensitivity and accuracy. Since the converted signal is fed to measurement parametric oscillators directly without any conversion or intermediate conversion, the sensitivity and accuracy (number of bits) of the converter are determined only intrinsic noise of a parametric oscillator circuit. Claims of the invention A phase-code converter containing a pump generator, and a d-discharge. cells, each of which includes a parametric measurement generator and a mixer, are different. Due to the fact that, in order to increase the sensitivity and accuracy of phase conversion, a measurement and two parametric oscillators, two keys, two phase detectors and two triggers were added to the first bit cell, the first output of the pump generator being simultaneously connected to the input of the first parametric oscillator and through the / first reference parametric oscillator to the first input of the first phase detector, and the second output of the pump generator to the input of the second measuring signal the generator and through the second reference parametric generator to the first input of the second phase detector, while the direct and inverse outputs of the first and second measuring; parametric generators are connected to the inputs of the first and second switches, respectively, the direct output of the first measuring parametric generator connected to the second input of the first phase detector, and the inverse output of the second measuring parametric generator to the second input of the second phase detector, while the outputs of the first and second; phase detectors are connected to the SIM input of the first and second triggers, respectively, the inverse outputs of which are connected to the control inputs of the first and second keys, and the outputs of the keys are connected to the mixer inputs whose output is connected to the inputs of the measuring and reference parametric generators of the next bit cell, the reference parametric oscillator, the phase detector, the trigger and the dual key are additionally introduced into each of the remaining bit cells, with the forward and inverse outputs of the measuring pair A metric generator is connected to the first inputs of the first and second keys, respectively, the outputs of which are connected to the mixer inputs, and the output of the reference parametric generator is connected to the first input of the phase detector, to the second input of which is connected the direct output of the measuring parametric generator, and the output of the phase detector is connected the trigger input, the inverse output of which is connected to the control inputs of the keys, with in each subsequent bit cell the second inputs of the first and second keys it is connected respectively to the outputs of the first and second keys of the previous bit cell, and the inputs of the measuring parametric generators of all the bit cells are combined and connected to the input bus, and the outputs of the flip-flops are connected to the output wiring. Sources of information taken into account in the examination 1, USSR Author's Certificate No., cl. G 01 ft 25/00, 1974, 2.Vechkanov G, P. Converters analog-code using the generators of subharmonic vibrations. Sat Article Nonlinear and microwave radio engineering systems. Works MAI. Issue.215. M., Mechanical Engineering, 1970, p.114 Output code BUT Taffjiui a states pa () db $ preozrazvatel yes