SU744967A1 - Device for converting number code into pulse frequency - Google Patents

Description

The invention relates to computer technology and can be used in devices for numerical control of machine tools.

Known Converter code numbers in the frequency of the pulses, containing a pulse generator, triggers, decoder inconsistencies, digital function converter, counters 1. However, this transform does not / allow control of the frequency of the output pulses.

A device for converting digital codes into a pulse frequency is known, comprising a generator, a valve, frequency dividers, a counter and. a switch, the generator output is connected to the input of the first frequency divider and through a switch to the inputs of the third frequency divider and a valve, the output of the valve is connected to the counter input, the outputs of the bits of which are connected to the inputs of the second frequency divider, the output of the third frequency divider through the switch to the inputs of the valve and The second divider is 2. However, this device does not (

possesses sufficient functional flexibility.

The aim of the invention is to control the frequency of the output pulses directly during the operation of the device.

The goal is achieved by the fact that a decimal adder, a decoder and a driver are inserted into a device for converting a code of a number into a pulse frequency containing a generator, the first output of which is connected to the first input of an element AND whose output is connected to the first input of a counter. the adder consists of serially connected binary-decimal jummators, the control inputs of which are connected to the input buses, the clock inputs are connected to the second output of the generator, while the output of the tenth is the sum torus is connected to the second input element And, the first input element And connected to the first input of the imaging device, the first output of which is connected to the output bus, the second output to the second input of the counter, and the second input to the output

the decoder, the inputs of which are connected to the outputs of the counter.

The drawing shows a block diagram of a device for converting a code of a number into a pulse frequency.

It contains a decimal adder 1 consisting of binary decimal adders 2, element 3, generator 4, counter 5, decoder b, driver 7, input buses 8, and spacing 9.

The conversion of a code of a given number into a pulse frequency is described by the expression A (x); 6B (x is the sum number of the sum, aB is the given number). With each summation the current value of the amount. A (x) is compared with the constant C, which determines the proportionality of the frequency of the output pulses of a given number. At A (x) s-C, the output, impulse is generated, and the constant C is subtracted from the current sum A (x). Subsequent summation occurs with the remainder of A (x) -Set. to the next comparison.

The device works as follows.

The vV-bit decimal number in the twofold-decimal code on the input bus 8 enters the adder I and is continuously summed. The rate of summation is determined by the frequency of the pulses fed to the cr3 mapper 1 from the generator. : The transfers that occur at the output of the JTOpa Ij are gated on the element And their pulses from the generator and then fed to the counter input and summed. The contents of the counter are continuously increasing and when a certain value of the decoder reaches a signal, the signal is sent to the driver, In the former, the signal is gated pulses from the generator, an impulse is produced from the output of the former ;, which ry resets the count of the counter 5. At the same time, an output pulse appears from the other output of the former 7. The summation of a given number in adder 1 continues and the resulting carry signals from

; . ..

The accumulator 1 is summed by the counter.

When the content of the counter reaches a certain value, the decoder again issues a signal, through which a counter reset pulse and an output pulse are generated. Thus, the output of the device produces pulses from the hour; hundred, proportional to the number, the code of which goes to the adder. The ratio of the frequency of the output pulse; JCOB and a control number is determined. the value of a constant value, decoded by the decoder. Such an embodiment of a device for converting a code of a number into a pulse frequency allows controlling the frequency of the output pulses directly during operation of the device by changing the number that determines the frequency of the pulses, which is very important when implementing blocks for setting feed speeds in computer numerical control devices.

Claims (1)

Invention Formula A device for converting a code of a number into a pulse frequency, comprising a generator, the first output of which is connected to the first input of the element AND whose output is connected to the first input of the counter, in order to control the frequency of the output pulses directly during operation of the device, a decimal is entered adder, descrambler and driver, and the decimal adder consists of successively connected binary decoders, adders whose control inputs are connected to the input buses, clocked the inputs are connected to the second output; the generator, while the output of the decimal adder is connected to the second input of the element I, the first input of which is connected to the first input of the driver, the first output of which is connected to the output 1.SHNOY, the second output to the second input of the counter, and the second input - with output j of the decoder, the inputs of which are connected to the outputs of the counter.