SU627585A1 - Numeric code-to-time interval converter - Google Patents

Description

I

The invention relates to aBTOMaTH and computer technology and can be used in a calculating technology to convert a value specified in the form of a numerical code, into a time interval, voltage or current.

A known method for converting digital values into electrical signals is based on recording the converted code and fixing the counting pulse l.

The closest in technical essence to the invention is a method of converting a numerical code into a time interval based on converting the code into the number of counting pulses, fixing the time of arrival of the clock pulse 2.

However, these methods do not have sufficient accuracy

The aim of the invention is to improve the accuracy of the conversion.

The goal is achieved by supplying potential pulses, determining their presence, recording the instant of coincidence of potential pulses of all bits or high bits and a counting pulse, determining the time interval between the moment of occurrence

clock pulse and the moment coincide. day pulses.

FIG. 1 shows a block diagram of a device that implements the proposed method; in fig. 2 - time diagram of operation: devices.

The device contains coincidence blocks l ... lg, counter 2, executed on the Zoo ... W triggers, differentiating the chains and 4 ... 4p, triggers 5 and 6..

The numerical code is fed to the coincidence blocks 1 ... in the form of the corresponding potentials. The same impulse is given to the impulse of the record p (see Fig. 2), which exceeds the clock signal in time. According to the recording signal, the preset code is correspondingly rewritten to the triggers 3 ... 3 of counter 2. After the trigger 5 of the synchronous clock signal arrives at the input (Fig. 2a), the trigger 5 from time point b or t produces a rasterizing signal (see fig. 2p) a matching unit 15, which begins to pass counting pulses (see Fig. 2c or 2c) to the input of the first trigger 3 of the counter.

Claims (2)

Counter 2 begins to fill. At the moment of time preceding the full filling (overflow) of the counter, the signals (see Fig. 2e, 2c, 2k), respectively, taken from the Zlg 3, 3 trigger, allow the passage of one or two counters of CEM to or from. At the output of the coincidence block Ig, a signal appears (see Fig. 2m), the first pulse of which triggers trigger 6, which is tilted by a counting pulse (see Fig. 2c or 2c). With trigger b, the signal is removed (see fig.2n). Differentiating the second front of the inverse signal H) through the differentiating chain 4, produces a pulse O at the time o, corresponding to the beginning of the interval (-k - G) proportional to the desired value of the given numeric code Time interval () between the pulse O and the next clock impulse a (see FIG. 2) is the desired interval proportional to a given code number. If trigger 5 is a fast action, then the pulse n taken from its second output (reverse pulse n) also has the desired duration. If a special trigger is triggered, triggered by signal O p with signal a (not shown in FIG. 2), then signal J can be sent to trigger 5 instead of signal O. Overflow signal l, removed after passing trigger 34 and differential chain 4, lags behind moment 1 in time from the desired signal to, the sum of the delay time D 3 of all the bits of the counter and therefore, from the point of view of generating a given interval, is false. The recording signal p must be applied between the signal and the next clock pulse a, while the triggers of counter 2 are in their initial positions (for example, on zero). Before the recording signal, on all triggers, it is advisable to send a reset signal, which will provide an additional backup holding of the state of all the trigger triggers to zero. Claim method A method of converting a numerical code into a time interval based on converting a code into a number of counting pulses, fixing the time of arrival of a clock pulse caused by Yathem that, in order to improve the accuracy of the conversion, potential pulses are supplied, their presence is determined, the moment of coincidence is fixed potential pulses of all bits of the high bits and the counting pulse, and determine the time interval between the instant of the occurrence of a clock pulse and the instant of the coincidence of the pulses. Sources of information taken into account in the examination: 1. Drozdov EA and others. Automatic poeobrazovanie and encoding information. M., 1964, p. 399-405. 2. Authors certificate of the USSR 122942, cl. H 03 K 13/03, 1957. . t I I I I I I G I I I 3rd f I I and I and I and Mmm