SU1359751A1 - Two-phase test oscillator - Google Patents

Abstract

The invention can be used to determine the errors of cumulative phase meters. The purpose of the invention is to expand the functionality of the device. The generator contains a pulse generator 1, a counting element 2, shapers 3 and 17, a switch 13 and an adder 15. The introduction of a controlled divider 4 frequencies, counters 6 and 11 of pulses, keys 7 and 8, digital indicator 14 and memory register 16 provides the formation of phase shifts, significantly exceeding 21G, in a wide frequency range. 1 il. S

Description

The invention relates to a phase-sensing tech-shke and can be used to determine the error of cumulative (multi-turn) phase meters.

The aim of the invention is to expand the functionality of the measuring two-phase generator.

pa due to the formation of the phase shift of the counting element 2, and

gov, far exceeding ZIT, in a wide range of frequencies.

The drawing shows a structural diagram of a measuring two-phase generator,

The proposed measuring two-phase generator contains a series-connected pulse generator 1, a counting element 2 with a scaling factor 2 and the first driver 3, the output of which is the first output of the device, control divider 4 frequencies, the input of which is connected to the output of the pulse generator 1, controlling The inputs of the controlled divider 4 frequencies are connected to the bus 5 of the code control frequency, the first p-bit reversing counter 6 pulses, the input of the plus in which is connected to the output of the divider 4 hours OT through the key 7, and the counting input in minus is connected to the output of the 4 frequency divider through the key 8, the control inputs of the keys 7 and 8 are connected to the corresponding inputs 9 and 10 of the device operation mode control, the second k-bit reversible counter 11 pulses, counting the inputs of which are connected to the corresponding transfer outputs of the reversible counter of 6 pulses, the inputs for setting the counters 6 and 11 to zero are connected to the ground bus 12 via the zero setting switch I3, the digital indicator 14, the inputs of which are connected to the outputs of the counters 6 and 11, n times the regular adder 15, the first group of inputs of which are connected to the outputs of the reference element 2 by the senior m bits, and the lower busbar connects to the ground bus 12, the second group of inputs of the adder 15 is connected to the outputs of the reversible counter 6 pulses, memory register 16 , the information inputs of which are connected to the outputs of the adder 15, and the record input is connected to the output of the generator 1, the second driver 17, whose inputs are connected to the outputs of the register

16, and the output is the second output of the device,

The device discrete changes

360 ° 2

phase shift

it is determined only by the size of the first counter 6 (the fraction counter of the phase shift) and does not depend on the coefficient 2

m

hence, does not depend on the frequency of the output signals. Thus, at the output of the device, signals of the form

U, and,

sin 2 -tL-- t;

Ua

25

 - | r- (T, -Ti) j

t +

M

0 0 0 5 0 5

five

where M is the division factor of divider 4, which determines the rate 5 of the change in the phase shift between the signals and., and T, -Tj is the time interval during which the keys 7 or 8 respectively are open (the sign takes into account the arrival of pulses from the output of the key 8 to the input counting in the minus counter 6, which leads to a delay of the phase of the signal U2. relative to the phase of the signal ut);

and, uj. - the amplitudes of the generated signals, the phase shift between which can be changed smoothly, both in the direction of the increase and in the direction of decrease in the range significantly exceeding O-3TG. At the same time, the expansion of the range of the generated phase shifts is provided by the choice of / T | -

- r / - Tj / ---, and smooth continuous

g

change in phase shifts in broad. the frequency range is achieved by reducing the discrete change, phase shifts (fa., t, i.e. by choosing n sh.

The value (jo-, does not depend on

 one

frequencies and in the entire frequency range from O to (where G. x is the maximum frequency of the master oscillator, the value of which is limited only by the speed of the selected

3

ment base) remains constant

360 ° and equal to q).

Measuring two-phase generator operates as follows.

Before starting work with the help of the switch 13, the reversible counters 6 and 11 are zeroed out. The output pulses of the generator 1 are frequency-f |. arrive at the input of the counting element 2, the conversion factor is equal to 2. The t-bit code sequences obtained by the output of the scaling element 2 by the shaper 3 are converted into an output sinusoidal signal U ,. Simultaneously pulses from you13

generator 1 is fed to the input of a controlled divider 4 frequency, the division ratio M of which, by definition, the rate of change of phase shifts, can be set by signals received from the control bus 5, the frequency from the output of divider 4 frequency arrives at the inputs of keys 7 and 8 which, depending on the operation mode control signals at inputs 9 and 10 of the device, solves or prohibits the passage of pulses to the counting inputs in the + or - n-bit counter, respectively, of 6 fractions of the phase cycle. The codes obtained at the output of the counter 6 arrive at the second group of inputs of the n-bit adder 15, in which they are summed with the digit output codes and recalculate the leg of the element 2 arriving at the m most significant bits of the first group of inputs of the adder 15 the output of the adder 15, the codes arrive at the inputs of the register 16, which stores these codes when the next front pulse of the register from the generator 1 arrives at the input of the register, this aligns the propagation delays of all bits s at the output of the adder 15, thus the register codes on output 16 vary relatively codes outlet sealer member 2

360 magnitude Cf l- -j-n- Pototog-iy, choosing

the value of nt, it is possible to ensure that the phase shift in the time shift in a wide frequency range, the lower limit of which is equal to O, and the upper limit is determined only

9751

. the speed of the selected element base, limiting the frequency of the generator 1, and the size of the conversion

5 element 2. The formation of a sinusoidal signal at the second output of the device from the code sequences coming from the output of the register 16 is performed by the shaper

10 17 is similar to the formation of a signal at the first output of the device. In this case, the width of the DSL and ROM included in the imaging unit 17, must correspond to the size of the totalizer

15 pa 15.

The device provides for the possibility of forming alternating phase shifts. When counter overflows 6, i.e., when the phase

20, the shift between the output signals, increasing, exceeds the values

ny 2tg, the transfer pulse from the output of the counter 6 parts of the phase shift is fed to the counting input of the k-bit

counter 11 whole phase cycles and increases the code in the counter 11 by one. With a change in the phase shift towards a decrease and transition of the boundary of the phase cycle, the borrowing pulse

reduces the state n1-1e counter 1 1 per unit. In this case, the most significant bit of counter 11 is a sign (the + sign corresponds to the logical level —nul, and to the - sign - to logical

units), and the range of the specified phase shifts is limited by the

C 12 T. Presented in the additional code at the output of counters 6 and 11 are the values of the total phase shifts of the displays.

Indicated by digital indicator 14 ,. A two-phase generator allows the formation of signals, the phase shift between which, unlike the prototype, can be set in the range

significantly higher than O-ZT, and nmenno but in the range of ± 2 iT, where k - counter width 1 integer) - 1x phase cycles. Smooth change of phase shift within mi-ipoKOM

the frequency range is achieved by decreasing the discrete change in the phase shift, which, in a distance from the prototype, does not lead to a narrower frequency range and remains constant

across the entire frequency range of the output signals. For example, at f 10 MHz, n 12, m 4 it is possible to provide a discrete change in phase shifts 4 (1 0.09 in the frequency range

that is, up to 625 kHz, which allows you to set any values of phase shifts in the range of ± 2 1Г with discrete qj. 0.09 ° in the O-625 kHz frequency range. In addition, the proposed device provides the ability to adjust the rate of change of phase shifts over a wide range by changing the division factor M of the divider 4.

Claims (1)

Invention Formula A measuring two-phase generator containing a series-connected pulse generator, a counting element and the first driver, the output of which is the first output of a two-phase generator, a contramator, the first group of inputs of which are connected by high bits to the outputs of the counting element, the second driver whose output is The second output of the two-phase generator, characterized in that, in order to expand the functionality of the two-phase measuring generator by forming a phase x shifts, significantly exceeding the ZV, in a wide frequency range, a controlled frequency divider, two keys, - two reversible pulse counters are introduced into it. Editor T. Parfenova Order 6151/48 Compiled by S.Kulishch Tehred L. Serdyukova Corrector Circulation 730 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4 59751б digital indicator and memory register; controlled frequency divider input connected to pulse generator output With owls, the information inputs of the keys are connected to the output of a controlled frequency divider, the counting inputs of the first reversible pulse counter are connected to the information outputs of the CGNG, the inputs of the zero setting of the reversible pulse counters are connected via the zero setting switch to the ground bus, the outputs of the first reverse pulse counter are connected 15 with the second group of inputs of the adder, the lower digits of the first group of inputs of which are connected to the ground bus, the transfer outputs of the first reversible pulse counter are connected 20 with counting inputs of the second reversible pulse counter, inputs x of the digital indicator are connected to the outputs of the first and second reverse pulse counters, information 25 the memory register inputs are connected to the outputs of the adder, the register recording input is connected to the output of the pulse generator, and the memory register outputs are connected to the inputs of the second generator 30, the control inputs of the frequency divider are connected to the code control frequency terminal, and the control. the key inputs are connected to the control inputs of the mode of operation of the measuring two-phase generator. Proofreader V. But ha