RU5694U1 - PULSE GENERATOR - Google Patents

Abstract

A pulse generator including a multivibrator and a preamplifier, characterized in that the pulse generator is equipped with an electronic switch and an output signal amplitude regulator made in the form of an amplifier on a transistor connected according to a circuit with a common base, and the electronic switch is supplied with power from the output of the amplitude regulator output signal.

Description

1700 Hz.

The prototype of the utility model is the stable m: / Livibrator circuit shown in Radio N 12 magazine for 198 Ug, p. 64. The device includes a multivibrator proper, made according to the classical scheme with two transistors with frequency-setting 1. - a chain, and a preliminary amplifier. The device generates rectangular pulses with a duty cycle,

close to two, in the band from 1 Hz to 100 KHz with a high level voltage, 1 V lower supply voltage, low level voltage from 0.4 to 1 V.

device power supply from 5 to 13 V.

The advantage of the device is the high stability of the output signal.

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The disadvantage of the prototype is the lack of frequency and amplitude controllers of the output signal of the multivibrator.

The objective of the utility model is to expand the functionality of the device.

This problem is solved in that the generator of square-wave pulses of a stable frequency rectangular shape, including a multivibrator and a preamplifier, is additionally equipped with an electronic 1-case and an output signal amplitude regulator made in the form of an amplifier on a transistor, made according to a circuit with a common base, and the electronic key is supplied from the output of the output signal amplitude regulator.

The utility model is illustrated by the following drawings. Ve. Y1G. 1 shows a functional diagram of a pulse generator. W FIG. 2 shows a schematic diagram of a multivibrator with a preliminary amplifier. Ne, FIG. Figure 3 shows a general diagram of the amplitude controller.

The pulse generator (Fig. 1) consists of m: / l1.vibrator 1, an electronic switch 2 and an output signal amplitude regulator 3. Multivibrator 1 is made according to the classical circuit (Fig. 2) on transistors T1, T2 and is equipped with a preliminary amplifier on transistors TK, T4, T5, T6, parshetricheskim stabilizer on the elements R1, D1. The chain R2, C1 sets the pulse frequency of the multivibrator. To regulate the frequency, the resistor R is made variable. The control electrode of the electronic key 2 is connected to the output of the mule.vibrator 1. In the simplest case, a transistor key can be used as an electronic key. Food on electronic

- the key S is supplied from the output of the ash-amplitude regulator 3. The amplitude-regulator 3 (Fig. 3) is made in the form of an amplifier on transistor T7, connected according to a circuit with a common base. In the base circuit of the regulator of amplitude 3, a variable resistor R3 is included, designed to control the sial-amplitude of the output signal of the generator of pulses.

The pulse generator operates as follows. When a 14 V constant n-voltage pulse is applied to the pulse generator, the pulse 1 is excitated in the multivibrator 1. It has a rectangular shape with a duty cycle of 2, amplitude a B, determined by the parametric stabilizer R1, D1 and the frequency specified by the parameters of the frequency setting chain R2, SM, and determined by formula F 0.81 / R2 C1. The pulses from the output of the lithovibrator 1 are supplied to the control electrode of the electronic switch 2. A voltage is applied to the collector-emitter junction 2, the value of which is set by the value of the variable resistance R3 included in the base circuit of the amplitude regulator 3. Rectangular pulses with a duty cycle of 2 are removed from the output of the electronic key , with a frequency of 200 to 1700 Hz and an amplitude of 1 to 14 V.

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Claims (1)

A pulse generator including a multivibrator and a preamplifier, characterized in that the pulse generator is equipped with an electronic switch and an output signal amplitude regulator made in the form of an amplifier on a transistor connected according to a circuit with a common base, and the electronic switch is supplied with power from the output of the amplitude regulator output signal.