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RU-2861377-C1 - METHOD FOR AMPLIFYING RECTANGULAR PULSES AND AMPLIFIER DEVICE VARIANTS

RU2861377C1RU 2861377 C1RU2861377 C1RU 2861377C1RU-2861377-C1

Abstract

FIELD: radio engineering. SUBSTANCE: method for amplifying rectangular pulses is proposed, which involves amplification using an amplifier unit operating in a switching mode. Each amplified pulse is differentiated, thus converting it into two opposite-polarity exponential pulses, after which the resulting opposite-polarity pulses are amplified using an alternating current amplifier. The amplified opposite-polarity pulses are subjected to inverse conversion into a rectangular pulse, which is additionally amplified using an amplifier unit operating in a switching mode, from the output of which the output amplified pulses are taken. Amplifier devices for implementing the method are also proposed. EFFECT: increasing noise immunity when amplifying rectangular pulses. 14 cl, 4 dwg

Inventors

  • Avanesian Garri Romanovich

Dates

Publication Date
20260505
Application Date
20251107

Claims (14)

  1. 1. A method for amplifying rectangular pulses, which involves amplification using an amplifying unit operating in a key mode, characterized in that each amplified pulse is differentiated, thus being converted into two exponential pulses of different polarities, after which the resulting pulses of different polarities are amplified using an AC amplifier, the amplified pulses of different polarities are subjected to reverse conversion into a rectangular pulse, which is further amplified using an amplifying unit operating in a key mode, from the output of which the output amplified pulses are removed.
  2. 2. The method according to paragraph 1, characterized in that the pulses of different polarities are subjected to inverse transformation by forming the leading edge of the resulting rectangular pulse at the moment of receipt of an exponential pulse of positive polarity and the trailing edge at the moment of receipt of an exponential pulse of negative polarity.
  3. 3. The method according to paragraph 1, characterized in that the differentiation of pulses is carried out in an AC amplifier block with capacitive coupling at the input, the time constant of the input circuit of which is significantly less than the duration of the fronts of the amplified pulses.
  4. 4. An amplifying device comprising an output amplifying unit operating in a key mode, the output of which is the first output of the device, characterized in that an AC amplifying unit performing the functions of a differentiating amplifier is introduced into it, and a pulse converter, the input of which is connected to the output of the AC amplifying unit, the input of which is the input of the device, the second output of which is the output of the AC amplifying unit, the output of the pulse converter is connected to the input of the amplifying unit operating in a key mode.
  5. 5. An amplifying device according to paragraph 4, characterized in that the pulse converter is made in the form of an analog-to-digital device having an analog input interfaced with an AC amplifying unit, and a digital output, the voltage at which takes fixed values of two logical levels.
  6. 6. An amplifying device containing an output amplifying unit operating in a key mode, characterized in that an alternating current amplifying unit performing the functions of a differentiating amplifier, a pulse converter, and a switch are introduced into it, the output of which is the output of the amplifying device, the first input of which is connected to the output of the alternating current amplifying unit, the input of which is the input of the amplifying device, the second input of the switch is connected to the output of the amplifying unit operating in a key mode, the input of which is connected to the output of the pulse converter, the input of which is connected to the output of the alternating current amplifying unit.
  7. 7. An amplifying device according to paragraph 6, characterized in that the pulse converter is made in the form of an analog-to-digital device having an analog input interfaced with an AC amplifying unit and a digital output, the voltage at which takes fixed values of two logical levels.
  8. 8. An amplifying device according to paragraph 6, characterized in that the switch is made in the form of a mechanical two-position switch.
  9. 9. An amplifying device according to paragraph 6, characterized in that the switch is constructed on the basis of an electromagnetic relay having controlled normally closed and normally open contacts intended for switching signal circuits.
  10. 10. An amplifying device according to paragraph 6, characterized in that the switch is a controlled electronic device, made in the form of an analog multiplexer.
  11. 11. An amplifying device comprising an output amplifying unit operating in a key mode, characterized in that two AC amplifying units are introduced into it, the first of which performs the functions of a differentiating amplifier, a pulse converter and a switch, the output of which is the output of the amplifying device, the input of the first AC amplifying unit is the input of the amplifying device, the output of the first AC amplifying unit is connected to the input of the pulse converter, the output of which is connected to the input of the amplifying unit operating in a key mode, the first input of the switch is connected to the output of the second AC amplifying unit, the input of which is connected to the output of the first AC amplifying unit, the second input of the switch is connected to the output of the amplifying unit operating in a key mode.
  12. 12. An amplifying device according to paragraph 11, characterized in that the pulse converter is made in the form of an analog-to-digital device having an analog input interfaced with an AC amplifying unit and a digital output, the voltage at which takes fixed values of two logical levels.
  13. 13. An amplifying device according to paragraph 11, characterized in that the switch is made in the form of a mechanical two-position switch.
  14. 14. An amplifying device according to paragraph 11, characterized in that the switch is constructed on the basis of an electromagnetic relay having controlled normally closed and normally open contacts intended for switching signal circuits.

Description

The invention relates to the field of radio engineering and makes it possible to create devices designed to amplify and distribute both single and repeating rectangular pulses. A method of pulse amplification used for many years is the classical method, chosen as a prototype, which involves converting the energy of a DC power source into the energy of an output signal according to the law of the amplified signal in order to increase its power and maintain the constant component of the input signal, see, for example, [Voishvillo G. V. Amplifying devices. - M.: Radio and communication, 1983, pp. 4, 7, 8, Fig. 1.7]. The functions of an amplifier of rectangular pulses can be performed by an amplifying unit having both a linear and a nonlinear transfer characteristic, the output current of which, at a given load, is greater than the input current, and the amplitude-frequency characteristic of which allows the amplified pulse to be transmitted to the output with permissible changes in its shape. Similar devices containing series-connected input and output amplifying units, operating in a key mode and possessing a relatively high response speed have become widespread in modern digital and pulse technology. As an example, we can cite a bus driver constructed in the above manner, taken as a prototype and described in [Avanesyan G.R. Digital integrated circuits. - M.: Radio Engineering, 2008, p. 159]. A disadvantage of the classic method, as well as the devices that implement it, is the DC coupling between the amplifier input and the pulse source. This is necessary to transmit a flat pulse peak, but at the same time, this coupling reduces the noise immunity of the pulse amplifier, making it dependent not only on the constant voltage level on the line connecting to the signal source but also vulnerable to various slow-moving external electromagnetic influences, which is especially noticeable when working with remote sources. The technical result achieved by using the present invention consists in increasing the noise immunity of the created devices for amplifying rectangular pulses. The technical result is achieved in that in the method for amplifying rectangular pulses, which provides for amplification using an amplifying unit operating in a key mode, according to the invention, each amplified pulse is differentiated, thus being converted into two exponential pulses of different polarities, after which the resulting pulses of different polarities are amplified using an AC amplifier, the amplified pulses of different polarities are subjected to reverse transformation into a rectangular pulse, which is further amplified using an amplifying unit operating in a key mode, from the output of which the output amplified pulses are removed. The technical result is also achieved in that, according to the first variant, an amplifying device comprising an output amplifying unit operating in a key mode, the output of which is the first output of the device, according to the invention, is provided with an AC amplifying unit that performs the functions of a differentiating amplifier and a pulse converter, the input of which is connected to the output of the AC amplifying unit, the input of which is the input of the device, the second output of which is the output of the AC amplifying unit, the output of the pulse converter is connected to the input of the amplifying unit operating in a key mode. The technical result is also achieved in that, according to the second variant, an amplifying device containing an output amplifying unit operating in a key mode, according to the invention, is provided with an AC amplifying unit that performs the functions of a differentiating amplifier, a pulse converter and a switch, the output of which is the output of the amplifying device, the first input of which is connected to the output of the AC amplifying unit, the input of which is the input of the amplifying device, the second input of the switch is connected to the output of the amplifying unit operating in a key mode, the input of which is connected to the output of the pulse converter, the input of which is connected to the output of the AC amplifying unit. The technical result is also achieved in that, according to the third variant, two AC amplifying units are introduced into the amplifying device, which contains an output amplifying unit operating in the key mode, according to the invention, the first of which performs the functions of a differentiating amplifier, a pulse converter and a switch, the output of which is the output of the amplifying device, the input of the first AC amplifying unit is the input of the amplifying device, the output of the first AC amplifying unit is connected to the input of the pulse converter, the output of which is connected to the input of the amplifying unit operating in the key mode, the first input of the switch is connected to the output of the first AC amplifying unit, the second input of the switch