SU696486A1 - Device for differentiating pulse-frequency signals - Google Patents

Description

The invention relates to the field of automation and computer technology and can be used, in particular, in discrete systems of automatic control of electric drives for deriving the signal from the set of 2 in the form of a sequence of variable frequency pulses. A differentiating device is known that contains a reversible counter control unit and unit determining the sign of the increment of the input signal 1. The drawback of the device is the limited range of variation of the input signals. A differentiating device is also known, which contains counters, a register, a logarithmator, a pulse generator, a code comparison unit, and AND and OR 2 elements. The drawbacks of the device are the complexity of the structural implementation and the narrow functionality. It is also known a device for differentiating pulse frequency signals comprising a pulse generator, the first output of which is connected to a control trigger input, a pulse counter connected by an zero input to a zero register input of a sign register and an output of a pulse shaper connected by an input to the output register recording control register and register a sign whose information input is connected to the output of the decoder connected by inputs to the outputs of the counter and the inputs of the output register connected by the inputs sign with the outputs of the register of the sign 3. The disadvantage of the device is the limited upper frequency of the range of input signals. The purpose of the invention is to increase the input frequency range. To do this, in a device for differentiating pulse frequency signals, the device input is connected to a counting input of a pulse counter connected by reversal control inputs to the outputs of a control trigger connected by a zero input to a decoder output, and the input of a pulse formating generator to the second output of the pulse generator. The drawing shows a block diagram of the proposed device. A proposed device for differentiating pulse frequency

The signal contains a pulse generator 1, the first input of which is connected to the input of a control trigger 2 connected by the outputs to the reverse control inputs of a pulse counter 3 connected by a counting input to the device input and connected to the zeroing input to the output of the pulse former 4, the input of which is connected to the second generator output 1 emuls. The outputs of the bits of the counter 3 are connected to the inputs of the decoder 5 connected to the zeroing input of trigger 2 and the information input of the character register 6 connected to the zeroing input to the output of the rammer 4, the recording control input to the second output of the generator 1, and the outputs to the character control inputs output register 7, which is connected by cares of bits with outputs of bits of counter 3, and the control input for writing is connected with the second output of generator 1.

The proposed device works as follows.

The input sequence of pulses goes to the counting input of counter 3, while a pulse of frequency f of the first output of generator 1 of pulses sets control trigger 2 to the output state ™, and a pulse of frequency fo from the second output of generator 1 through the driver 4 of pulses resets counter 3 to its original state. The potential of the zero output of the trigger 2 gives permission for the addition in the counter 3 shlpulses f arriving at its counting input. The next pulse of frequency fj sets the trigger 2 to the single state, schetchyK 3 th transfer mode in subtractor

If counter 3 reaches the state of subtraction, this state is decoded by decoder 5, the pulse from the output of which is stored in the character register and simultaneously sets the trigger 2 to the zero state, thereby switching the counter 3 to the NIN mode.

Since odd-numbered pulses from the pulse sequence from the first output of this generator are output at the second output of generator 1, simultaneously with the arrival of the third frequency pulse f, the frequency pulse fj from the second output of the master oscillator sends a command to write the current code value of counter 3 to the output register 7, ,at

in case J, if the counter 3 in the account mode passed through the zero value sign - from the output of register b of the sign converts the direct code in the output register 7 to the return one, 5 After writing the code of the counter 3 into the output register 7, the driver of 4 pulses will form a pulse that will set the counter 3 and the register of b signs in an initial state

0 At the same time, the third dpulse of the frequency f.j via the control trigger sets the counter 3 to the addition. The calculation cycle of the derivative is repeated. During the count cycle, in the current register 7, the result of the previous derivative calculation cycle is saved.

Thus, the proposed device allows to form

is the derivative of the input pulse frequency signal at higher pulse frequency than in the known device,

Claims (3)

Invention Formula A device for differentiated acousto-pulse signals, containing a pulse generator, the first output of which is connected to the input of a control trigger, an IMPULES counter, connected by a zeroing input to a register zeroing input and the output of the pulse former connected to the inputs of the output register recording and the register driver The information input of which is connected to the output of the decoder connected by the inputs to the output of the counter and. to the inputs of the output register connected by the control inputs to the sign from the outer sign register, which is different from that, in order to increase the range of the input frequencies, the device input is connected to the counting input of the counter I1.5 pulses connected by the inputs. controlling the reverse to the outputs of the control trigger — the zeroing input connected to the output of the decoder, and the input of the pulse generator is connected to the second output of the pulse generator. Sources of information taken into account during the examination 1. Levidov B, A, and others Measurement of speeds MS,, Standards Publisher; 1972, oh, 53, fig. 21, 2 o USSR author's certificate I 468245j class, f 15/20, 1973, 3. Avtooskoe certificate of the USSR No. 478334, CL. 606 7 3/00, 1973,.