SU785873A1 - Device for shaping voltage proportional to sine and cosine of input signal - Google Patents

Description

one

The invention relates to the field of automation and computer technology, in particular, to devices for functional transformation by sine and cosine dependencies.

A sine-cosine function converter 1 is known, containing a source of reference voltage, frequency dividers, a control unit, a carrier frequency setting unit, 16 filters, a memory unit, a code-voltage converter, and an output phaser.

The drawback of the device is the reduced accuracy of the formation of 15 phase-shifted output voltages in the case of using analog phase distributors or the complexity of the design implementation of the device in the case of using digital phase-20 expanders.

It is also known a device for generating sine-cosine voltages f2 comprising a reference source, an input register, a control unit, a linear code-voltage converter, an inverter, a switch, and BHxcijiHbie adders with resistors .30

The device carrier is a reduced accuracy of forming the phase shift of the output voltages.

The prototype of the invention is a device for generating voltages proportional to the sine and cosine of the input signal 3j, comprising an adjustable delay unit, a sinusoidal voltage generator, and an expander unit connected by information input to the output of the sinusoidal voltage generator and connected to the outputs of the device; A sinusoidal voltage generator output through a synchronization pulse shaper is connected to the start input of an adjustable delay unit performed on the counter, trigger, element And and overflow decoder, the output of the adjustable delay unit connected to the control inputs of the expander unit whose input information input is connected via a phase shifter generator output. sinusoidal voltage. The drawbacks of the device are the reduced accuracy of the formation of the phase shift of the output voltages and the narrow class of problems to be solved (the device does not allow simultaneous production of positive and negative values of sine and cosine signals).

The aim of the invention is to improve the accuracy, the formation of output voltages and the expansion of the class of solvable wounds,

To this end, amplifiers, a sinusoidal voltage generator, and an expander block connected by an information input to the sinusoidal voltage generator output and connected to the outputs of the device are additionally inserted into the device for generating voltages proportional to the sine and cosine B5. frequencies on five and four, And elements and a ring distributor connected by outputs to the first inputs of the first four And elements connected by second inputs to output ohm of the adjustable delay unit and connected outputs to the corresponding control inputs of the expander unit, the information input of the ring distributor connected by the installation input to the output of the fifth element I is connected to the output of the frequency divider at the first, the starting input of the adjustable delay and the first input of the fifth element And, connected by the second input to the synchronizing input of the generator of sinusoidal voltage and the output of the frequency divider to four, the input of which is connected to the clock bus and the input of the frequency divider into five.

CyiiecTBo of the invention is illustrated in the drawing, which shows the block diagram of the device.

The device contains a frequency divider 1 to five, the output of which is connected to the start input of the adjustable delay unit 2, the information input of the ring distributor 3, the outputs of which are connected to the first inputs of the first four elements AND 4 and to the first input of the fifth element AND 5. The second input of the element And 5, connected by an output to the installation input of the ring distributor 3, is connected to the synchronizing input of the sinusoidal voltage generator 6 and the output of the frequency divider 7 to four, the input of which is connected to the synchronous bus x Valid pulses and frequency divider 1 to five. The second inputs of the elements And 4 are connected to the output of the block 2 adjustable

and the outputs of the elements And 4,

delays,

connected to the corresponding control inputs of the expander unit 8 connected by an information input to the output of a sinusoidal voltage generator 6. The extender unit 8 contains four expanders, each of which can be made similarly to the extenders included in the expander unit of the prototype device.

The device works as follows.

The external clock voltage from the clock bus with a frequency F is applied to divider 1 and 7, from which the frequencies f F / 5 and f are removed, respectively. By their f / f ratio of 1.25 with frequency f triggered by block 2 of an adjustable delay, and generator 6 is synchronized by frequency f, from a period to a period of sinusoidal voltage generated by generator 6, the output pulse from block 2 will be delayed relative to the initial phase of generator b by 1/4 of the period of the output voltage of this generator, and the phase, respectively, on / 2, i.e. sequentially, at times of time, corresponding to the output pulses from block 2, the sinusoidal voltage produced by generator 6 will be proportional to sine, cosine, minus sine, minus cosine of the input signal. The separation of these voltages is carried out with the help of the ring distributor 3 and the four elements I 4, which commute the control inputs of the expander unit 8. A sinusoidal voltage is applied to the information input of the expander block 8, at the moment of arrival of the pulse to one of the expanders of the block 8, the sinusoidal voltage is recorded. The installation of the necessary phase takes place with the element I 5, to which impulses from dividers 1 and 7 are received. Once in 20 periods of sinusoidal voltage, the installation input of the required phase of the ring distributor 3 is installed at the installation input of the distributor 3.

Claims (3)

In this device, the shift is not carried out using a phase shifter, as in the prototype, but by choosing the ratio of the frequencies at the outputs of dividers 1 and 7, which can be implemented on standard digital microcircuits, and after assembly do not require adjustment unlike the use of analog phasers . The phase shift between the pulses of the sine and cosine values is exactly equal, since the ratio of 1.25 frequencies in the device is set exactly; and may differ from this value by no more than 0.01 ° (calculated value) due to the variation of the delay time of the elements And 4, and the operation of the keys in the block 8 by the expander The permanent error caused by inaccuracy of the generator b coupling is taken into account by summing the input signal And jp is some compensating additive. Claims. A device for generating voltages / proportional to the sine and cosine of the input signal, containing an adjustable Delay unit, a sinusoidal voltage generator and an expander unit, connected by an information input to the sinusoidal voltage generator output, and connected to the device outputs, characterized in that In order to improve the accuracy of forming output voltages and expanding the class of problems to be solved, the device additionally introduces frequency dividers for five and four elements And and a ring p the distributor connected to the outputs, to the first inputs of the first four elements And, connected by the second inputs to the output yflp An adjustable delay unit I and connected outputs to the corresponding control inputs of the expander unit, wherein the information input of the distributor connected to the output terminal of the fifth element I is connected to the output of the frequency divider at five, the start input of the adjustable delay unit and the first input five element And connected by the second input to the clock input of the generator of sinusoidal voltage and the output of the frequency divider by four, the input of which is connected to the bus clock Bs- and the input frequency divider into five. Sources of information taken into account during the examination 1. USSR author's certificate No. 601709, class C. 06 G 7/26, 1976. 2. USSR author's certificate 547967, cl. 06 G 7/26, 1975. 3.ABTOpicKoe certificate of the USSR 419911, c. 06 G 7 / -22, 1972 (prototype).