SU748858A1 - Time interval to code converter - Google Patents

Description

Sial Start. It is supplied to the input of the setting O of the trigger 3 and flips it. As a result, the latter opens the AND 4 element with its direct output, while the pulses from the generator 1 begin to arrive at the input of the element OR 9 and are applied to (the input of the counter 5, which counts the number of incoming pulses.

For stable operation of the circuit, it is necessary that the duration of these pulses be equal to half the length of a power wave between two adjacent pulses of the generator. With the arrival of the Stop signal, the trigger is reset and closes the pulse path to the counter. In the correction circuit of the signal, the Stop signal is delayed by a delay element 7 for 1 time r equal to the duration of the pulses of the generator 1. The delayed signal is fed to one of the inputs of the And 8 element, to the other input of which the generator pulses. The signal at the output of the element And 8 zvoznaykat only when the signal Stop comes in the second half of the pause, the last pulse of the generator, counted by the counter, and follow it with the pulse. This signal through the element OR 9 enters the counter, which increases its code by one. When the Stop signal comes in the first half of the specified pause, the readings of the counting stop are unchanged. .

FIG. 2a shows the Stop signal in the first half of the pause; in fig. 26 in the second half of the pause.

The operation of the described correction circuit halves the maximum value of the quantization error component At ,,.

This effect is achieved by a simpler scheme than in the known device. The use of this converter makes it possible to refuse the need for an additional counter containing the same number of bits as the main one and for output gates, which are also equal to the number of counter bits. This increases the reliability of the converter.

the invention

Formula

Converter time interval in the code that contains the generator. pulses, the output of which is connected to the first; the main input of the main element I, the second input of which is connected to the trigger output, the installation inputs 0 of the trigger are connected to the Start and Stop buses, a pulse counter, characterized in that the elements AND, OR and the delay element are introduced, the Stop signal bus being connected to the first input of the additional element AND, to the second input of which the output of the pulse generator is connected, the outputs of the main and additional elements AND through the element nt or connected to a pulse counter input.

Sources of information taken into account in the examination

1, E. Gitis. Information converters for electronic digital. Computer devices, M., Energie, 1975, p. 245.

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Claims (1)

Claim The time interval converter into a code containing a pulse generator, the output of which is connected to the first input of the main element and, the second input of which is connected to the trigger output, the installation inputs of the trigger are connected to the Start and Stop bus signals, a pulse counter, characterized in that, in order to increase reliability, AND, OR elements and a delay element are introduced into it, and the Stop signal bus through the delay element is connected to the first input of the additional And element, to the second input of which the pulse generator output is connected s, the outputs of the main and additional elements and through an OR gate connected to the input of the pulse counter.