RU8546U1 - PULSE GENERATOR - Google Patents

Abstract

A pulse generator comprising a voltage divider connected between the first and second power leads, a transistor comparison unit connected through a time-setting capacitor to the first power lead and through a diode-resistor circuit to a load element, the second input lead to a middle tap of the voltage divider , an intermediate transistor connected by a collector through the first resistor to the first power output, connected to the output terminal of the transistor comparison unit, the output transistor is connected a collector with a load element, the base with an intermediate transistor collector, a second resistor connected between the middle tap of the voltage divider and the collector of the output transistor, characterized in that the emitters of the intermediate and output transistor are connected to the second power output, and the other output of the load element is connected to the first power output.

Description

TMiEPATOP IBvHiyJEbCOB

The utility model relates to a high-voltage generator, and, generally, to a high-voltage generator, is intended for: use of B-control systems for managing technical objects.

The pulse generators containing the SC timing circuit, the transistor comparison unit, the transition number 1 circuit /,:; /

The closest technical solution, chosen as a prototype, is a pulse train generator / 2 /, which contains a time-consuming KS circuit and a differential amplifier, one of the inputs of which is connected to a time-varying capacitor, and the other to a voltage divider that creates reference voltages, the output of the differential amplifier 1 connected to the base of the transistor of the first stage, exceptionally designed in the form of a two-stage DC amplifier on bipolar transistors, the collector of the transistor of the second switching stage The connecting circuit is connected through a resistor to the base of the transistor of the differential amplifier and through parallel-connected circuits containing each resistor and diode, and the diodes in the circuits are connected in an opposite, with an integrated capacitor.

Mt and G3 to I / I2

In a car wiper motor control system, elements of its circuitry may be subject to pulsed overvoltage, -This imposes high requirements on the permissible collector voltage of the 11th transistorfred input circuit. This circumstance shakes the aiaturization of the pulse generator, since the use of a miniature transistor with a small maximum permissible collector voltage in the output stage significantly reduces the reliability of the device.

The inventive utility model is aimed at enhancing reliability and expanding the scope of the iguls generator.

The indicated technical result is achieved by the fact that in the generator of pulses containing a voltage divider

between the first and second; a power output, a transistor comparison unit connected by a first input terminal through a timing capacitor to a first power output and through a dddd resistor circuit with a load element, a second input terminal with a mid-tap of a voltage divider, an intermediate transistor connected by a collector to a first resistor -vy power output, the base connected to the output of the output of the transistor comparison unit, the output transistor connected by the collector to the point of connection of the element of the load and the diode-resistor circuit, the base - with a collector of an intermediate transistor, a second resistor, a Bkuychenny mekdu sredg-1tl by a voltage divider and a collector of Exit; south of the transistor, eschiters after draining the exact and output transistors are connected to the second power output, and the other output of the load element is connected to the first power output. Figure 1 presents a diagram of the generator ig / shulse. Iv device composition includes the following elements. Voltage detector I,

connected between the first 2 and second 3 power pins. The transistor comparison unit 4, connected by the first Bhodny 1 output through a voltage / voltage supply capacitor 5, to the output voltage, power supply 2 and through the diode-resistor circuit 6, to the load element 7 in the form of an electromagnetic relay winding, the second input terminal to the medium. the bottom tap of the resistive voltage divider I. Tpor.tajir accurate. transistor 8, connected collector. through the first resistor 9 to the first power output 2, the base to the output terminal of the transistor comparison unit 4, and the emitter to the second power output OU 3. The output transistor 10, connected by a collector through a load element 7 to the first power output 2, the base to the collector of the intermediate transistor 8, the emitter to the second power output 3. Three times the resistor II, connected between the medium TAPE of the voltage divider I and the collector of the output transistor 10.

UstroKstEO works as follows. When the first 2 and second 3 power leads are connected to the power source, due to the fact that the timing capacitor 5 is discharged, the output current of the comparison unit 4 is small and insufficient to open the intermediate transistor 8. In this case, the output transistor 10 is open, and a constant current flows in the load circuit 7 current denoting the operation of an electromagnetic relay. When the output transistor 10 is open, the timing capacitor 5 is charged from the power source through the circuit: the first power output 2 - the timing capacitor 5 - the diode-resistor circuit 6 - collector-extractor transitions of the open output transistor 10 - the second power output 3. After charging the time after the capacitor 5 to voltage, open the transistor of the comparison unit 4, the output current of the specified comparison unit 4 sharply increases to a value sufficient to open the intermediate transistor 8. the output transistor 10 closes, and the electromagnetic relay releases. Disputed voltage at the middle tap of the voltage divider

1, the jump decreases due to the shunting of the second resistor II of the upper arm of the voltage divider I, and the capacitor 5 is discharged through the load element 7 and the diode-resistor circuit. 6. When the voltage at the timed capacitor 5 is reduced to a value slightly lower than the reference voltage at the middle tap of the dbShtel voltage I, the output current of the comparison unit 4 decreases sharply, the intermediate transistor 8 closes, and the output transistor 10 opens. The electromagnetic relay is activated, and the absolute value of the reference voltage at the middle tap of the voltage divider I, measured in relation to the output

2 power supply, increases stepwise due to shunting of the lower arm of voltage divider I by the third resistor II. The conditions again arise for charging the time-consuming capacitor 5. Next, the process repeats as described above, as a result of which the electromagnetic relay switches its contacts with the necessary for normal operation of the wiper motor reducer with stagnation and repetition rate .

If you need a short-term operational change in the duty cycle and frequency of the voltage pulses that are swapped to the load element 7, the circuit 12 / Fig. 1/ from series-connected resistor and diode is additionally introduced into the device. With the external cohutation of the indicated circuit, for example, with the power supply output 2, it is possible to change the duty cycle and frequency of voltage pulses that are applied to the load element-7 over a wide range.

Thus, the connection of the emitters of the intermediate and output transistors to the second power output, as well as the connection of the other output of the load element to the first power output, favorably detaches the claimed device from the prototype, as it makes it possible to expand the scope of the generator.

Laboratory and operational tests carried out by 000 AB are electronics of OKB and OAO GAZ. They showed Eysokuto the competitiveness of the JoshulsoE generator, which was upgraded as a glass wiper interrupter, on the Gorky AvtoEaaEoda car.

Sources of information:

1.GoroshkoE B.I. Radio electronic devices. SpraEochnik. M .: Radio and SEYAZ, 1984, p. 247, fig. 1C.16.a

2.AETO certificate of the USSR JIS2569I, MKIT N SZ K I / I2. TShZ, IS72

Claims (1)

A pulse generator comprising a voltage divider connected between the first and second power leads, a transistor comparison unit connected through a time-setting capacitor to the first power lead and through a diode-resistor circuit to a load element, the second input lead to a middle tap of the voltage divider , an intermediate transistor connected by a collector through the first resistor to the first power output, connected to the output terminal of the transistor comparison unit, the output transistor is connected a collector with a load element, the base with an intermediate transistor collector, a second resistor connected between the middle tap of the voltage divider and the collector of the output transistor, characterized in that the emitters of the intermediate and output transistor are connected to the second power output, and the other output of the load element is connected to the first power output.