SU801239A1 - Voltage-to-time interval converter - Google Patents

Description

The invention relates to the regeneration of electrical signal parameters and can be used in the composition of the information of the measurement and measurement systems for the automatic control of the technological process of manufacturing the MOS-BIS. Devices are known for converting signals based on integrating the voltage of the input signal during a fixed cycle with further integration in the second fixed cycle of the sample voltage during the informative time interval 13. The main drawback of the devices is the low accuracy due to the need to perform switching operations in the input circuit signal n low speed, determined by the presence of the second conversion cycle. Also, JK deficiencies should include the omission of information in the input signal during the second cycle, which eliminates the possibility of continuous integration of the input signal, the need for which occurs in a whole number of cases. A known device for converting signals, whose operation is based on non-random integration of an input signal by an integrating channel during one fixed cycle; the level and the subsequent integration during the informational time interval of the sum of the voltage of the input signal and the model voltage Other tim mark until the end of the fixed cycle. This device eliminates the disconnection of the input signal voltage, and it is also possible to obtain information on the input signal voltage in one fixed G2 conversion cycle.

The main drawback of the device is its low speed, due to the fact that an arn change in the voltage of the input signal, for example, jump-like, due to the presence of impulse feedback in it, a transient process of establishing the information time interval occurs. Moreover, the number of cycles for establishing an informative time interval with a given establishment error can be significant.

The closest in technical essence to the present invention is a converter comprising an integrator, a first electronic key, an electronic key: a switchable source of reference voltage, a comparison device, a trigger, a clock pulse generator, the integrator input being connected to the output of the first electronic key and to the output of the second electronic key, the integrator output is connected to the input of the comparison device and to the control input of the switchable source of the reference voltage, the second input compares The device is connected to the common bus, the output of the comparing device is connected to the first trigger input and to the integrator control input, the output of the switching source of the reference voltage is connected to the second electronic key input, the output of the clock generator is connected to the control inputs of the electronic keys and to the second input Trigger W,

The main disadvantages of this converter are low accuracy due to the presence of a switch necessary for carrying out the switching operation in the signal circuit for periodic switching of Ux and DO, and the low speed determined by the presence of the second conversion cycle. In addition, this includes the omission of information about the input signal during the time of the second conversion cycle, which excludes the possibility of continuous integration of the input signal.

The purpose of the invention is to increase accuracy and speed.

The goal is achieved by the fact that in a voltage converter in a time interval containing an integrator, the first input of which is the input of the converter, the second input is connected to the output of the first key, and the output through the first comparison unit is connected to the first input of the first trigger, the second

the input of the first trigger is connected to the output of the generator of clock pulses, and the output is connected to the control input of the first key, switchable source of the reference voltage and the key, additional integration is introduced, the second trigger, the second comparison unit, the subtractor and the memory unit whose input is connected to the output of the main integrator, and the output to the first input of the subtraction unit, the second input of the subtraction unit is connected to the input of the converter, and the code to the information input of the first key and the first bus switchable source voltage, the second bus is connected to the first input of the additional integrator, connected by the second input to the output of the first key, the output of the additional

the integrator through the second comparison unit is connected to the first input of the second trigger and the information input of the secondorio, the controlling input of which is connected to the output of the trigger arctporo, and

the output with the third input is additionally integrated, and the second trigger input and the switching input of the switching voltage source are connected to the output of the clock generator.

FIG. 1 shows a converter block diagram; in fig. 2 - timing diagrams that show the operation of the converter.

The converter (Fig. 1) contains the main integrator 1, the first key 2, the second key 3, a switchable source

4 Phase voltage, first block

5 comparisons, the first trigger 6, the generator fop 7 clock pulses, the second trigger 8, the second comparison block 9, the additional integrator U, blessing And recording iwfiraaH-i, the subtraction block 12.

FIG. 2, FFMS 13 diagrams are denoted - input voltage control; 14 shows changes in the integral value formed by the main integrate 1; 15 is a form of changing the integral value generated by the additional integrator 10.

The device works as follows.

Claims (3)

In the next fixed conversion cycle T (p), the duration of which is T COhSit, the input signal voltage is integrated. As a result, at the end of the cycle, the integral value U (see Fig. 2) is formed at the output of the main integrator 1, koiTopoe 3anc v {HHaeTCfl by the memory unit 11. with the beginning of the next fixed cycle, trigger 6 is shifted to one another, a closure key 2, as a result of which, along with the integration of the input signal, the main integrator 1 integrates the sum of the signals, one of which was obtained in the memory result, the integral value of the other is inverted into voltage the input signal C until the equal value of the output value of the integrator 1 is zero, fixed by the block 5 of the comparison. During the time to CLC - the above, the sum of the signals is simultaneously integrated by an additional integrator Y. Along with this, it integrates the reference voltage U (j. Next, the integration of the input signal voltage by the main integrator 1 continues to obtain the integral value of the input voltage for a fixed cycle and an additional integrator 10 - integration of the reference voltage DO to the end of the informative time interval, the end of which is determined by the moment of equality of the floor The integral informative time interval T is equivalent to the average value T of the input signal voltage for time T. Of course, in each subsequent cycle, the interval Tji is proportional to the average value of the input signal voltage for the preceding cycle. with the time of one fixed accp, instead of two cycles of the known ares of the recipient, characterizes the lagged transformer / and the duration of the fcx of the conversion cycle in this converter is equal to the duration of the transform of the well-known transformation converter .-. Consequently, the proposed transducer has a high speed. Continuous integration of the input voltage eliminates the switching operation in the input signal circuit, which results in higher conversion accuracy. In addition, the absence of missing information about the output signal allows continuous integration of the input signal, which also distinguishes it favorably from the known converter. Claims of the voltage converter in the time interval containing the integrator, the first input of which is the input of the converter, the second input is connected to the code of the first key, and the output through the first fuse (comparison connected to the first input of the first trigger, second input of the first trigger connected to the output of a clock pulse, and an output with a control key input, a switchable voltage source and a second switch, characterized in that, in order to improve accuracy and speed, a second integrator, a second trigger, a comparison unit, a subtraction unit and a memory unit, the input of which is to the output of the master of the integrator, and the output to the first input of the subtraction, the second input of the subtraction unit is connected to the input of the first key and the first bus switchable source of exemplary voltage, the stream of which is connected to the first airway, is an additional integrator connected by the second input to the b-inlet of the first key, the output of the additional integrator through the second one It is connected to the first input of the second trigger and the information input of the second key, the control input of which is connected to the output of the second trigger, and the output is connected to the third input of the Secondary connector, the second input of the source of the samples on the voltage of the cable to the output of the clock pulse generator. Sources of information received in vnvmankyo during examination 1. USSR author's certificate number 505126, cl. And 03 K 13/17, 1973. 2. USSR author's certificate J 365038, cl. And 03 K 13 / 2O, 1971. 3. Authors certificate of USSR M 132863, cl. N OZ K 13 / 2O, I960 {prototype).