SU369542A1 - MEASURING SERIES OF TIME INTERVALS - Google Patents

Description

one

The invention relates to the field of radio electronics and can be used in devices for measuring time.

A series of time intervals meters are known, containing a series-connected pulse generator of a reference frequency, a key and a counter, the outputs of each bit of which are connected to the memory inputs through the readout unit, the input signal being fed to the enable input of the said key and through the pulse expander to the input of the circuit “And, to the second input of which the output of the second pulse expander is connected.

In order to increase reliability and speed in the proposed device, the output of the circuit is connected via a threshold element to the control, to its input of the readout unit and to the input of the second pulse expander, and the third input of the electronic circuit is connected to the output of the said key; the readout unit is made multichannel by the number of counter bits, and each channel contains a serially connected key, a pulse expander, an AND circuit, and a control input of the readout unit is connected via a delay line to the control inputs of the keys and a pulse expander to the second inputs of an I.

The drawing shows a diagram of the proposed device.

The proposed meter of a series of time intervals consists of the generator / pulse of the reference frequency, 1 {2 key 2, counter 3, pulse spreader 4, the output of which is connected to the input of the “I 5” circuit, the second input of which is connected to the key output, and the third through the second pulse expander 6 and the threshold circuit 7 is associated with its output; a chain of successively connected delay elements 8, the output of which is connected to the output of the threshold circuit 7, and the output of each delay element is connected to the input of the read key 9 of the corresponding counter counter, the serially connected circuits of the pulse extender 10 and the AND / circuit between the read keys and the storage device 12, and the third pulse expander 13, which connects the output of the last delay element 8 with the inputs of all AND // circuits. The operation of the proposed device proceeds

in the following way. The pulses of the measured series are fed to the input of the device, the first of which opens the key 2, as a result of which the generator / pulses of the reference frequency are counted by the counter 3.

The pulses of the measured series are expanded.

pulse expander 4 for a time greater than the period of the pulse of the reference frequency, but less than two periods, and fed to the first input of the circuit "AND 5. To the second input of the circuit" And 5 a pulse of the reference frequency is applied, and to its third input - the resolving potential from the output of the pulse extender 6. At the moment of coincidence of the pulses at both inputs of the "AND 5" circuit, a pulse appears from its output, from which the threshold circuit 7 forms a read pulse. The same pulse is expanded by the pulse expander 6, as a result of which the resolving potential is removed from the third input of circuit 5, eliminating the possibility of forming a read pulse from the next pulse of the reference frequency. The presence of the threshold circuit / G is necessary to eliminate the possibility of skipping the current time values, which may arise due to the small amplitude of read pulses at the output of the And 5 circuit, which triggers the expander of pulses 6, but not sufficient for reading. This takes place in case of coincidence of the transition process in the pulse expander 4 with the moment of arrival at the input of the AND 5 pulse of the reference frequency. Read pulses combined with reference frequency pulses are applied to read keys 9 through delay elements 8 connected in series, the delay time of each delay element being equal to or slightly longer than the transfer time of each digit of the counter. Thus, read keys 9 are affected by a series of pulses displaced in time, as a result of which bit reads occur with a shift in time by the transfer time of each digit of the counter. Pulse expander 10 form a series

the long shifted pulses, at the time of the read pulse passing through the last delay element 8, the pulse expander 13 generates a pulse of a predetermined duration, which is fed to the AND 11 circuits and enters the current time code into the memory 12.

Subject invention

Claims (2)

1. A meter of a series of time intervals containing a series-connected pulse generator of a reference frequency, a key and a counter, the outputs of each bit of which through the readout unit, respectively, are connected to the inputs of the storage device, the input signal being fed to the enabling input of the said key and through the pulse extender to the input of the " The second input of which is connected to the output of the second pulse expander, characterized in that, in order to increase the reliability of the device, the output of the said AND circuit is connected to the control input of the readout unit and to the input of the second pulse extender, and the third input of the AND circuit is connected with the release of the mentioned key. 2. The meter of a series of time intervals according to claim 1, characterized in that, in order to improve speed, the read unit is made multichannel by the number of counter bits and each channel contains a serially connected key, a pulse spreader, an AND circuit, and a control input of the block reading through the delay lines is connected to the control inputs of the keys and through the pulse extender to the second inputs of the "I. / vcm o