RU7564U1 - MANAGED GENERATOR - Google Patents

Abstract

A controlled generator containing a first source of control voltage, a non-inverting logic element, to the input of which is connected a first time-setting resistor and a time-setting capacitor, the second output of which is connected to the output of the non-inverting logic element, and through a resistor shunted by a capacitor, to the base of a bipolar transistor connected to the resistor , the second output of the first timing resistor is connected to the collector of a bipolar transistor, characterized in that it is additionally introduced a second a timing resistor connected between the collector of the bipolar transistor and the power bus, the emitter of the bipolar transistor is connected to the table of the field effect transistor, the source of which is connected to the first control voltage source and through the resistor to the common bus, the gate of the field effect transistor is connected through the resistor to the common bus and to the second source control voltage.

Description

Controlled generator

The utility model relates to pulsed technology and can be used in various electronic control and regulation devices, in particular in power sources.

A device known as a controlled generator (a.s., ЛЯ316075, НЗЗ КЗ / 28), comprising three series-connected inverters, a first capacitor connected between the input of the first and the output of the second inverter; a resistor connected between the input of the first and the output of the third inverter connected through the second capacitor to the diode's cathode and the base of the transistor, the shitter of which is connected to the input of the fourth inverter and through the resistor to the common bus, and the collector is connected through the resistor to the bus of the source that controls the voltage, the fourth output the inverter is connected to the second input of the third inverter.

The disadvantage of that device is a large number of logical elements and the connections between them, which complicates the principle of operation and technology of that device.

To control the SToro generator, a wide range of control voltage changes in the supply voltage of the logical elements is required without going into the range of negative control voltages. This reduces the functionality of the device.

It is also known device controlled pulse generator (AS 1559395, NOZ KZ / 28) containing - trigger, u®,

WITH . circuit, resistive divider, non-inverting element 2I, element 2Sh1I - NOT.

The disadvantage of this device is the large number of logic elements, as well as a large range of control voltage changes without going into the range of negative control voltages; this leads to a limitation of the functionality of the device.

The purpose of the utility model is to simplify the device and expand the functionality.

the input of which is connected to the first driving resistor 2 and a timing capacitor 3 connected to the output of the non-inverting logic § of element I and through the resistor 4 shunted by the capacitor 5 to the base of the bipolar transistor 6; resistor 7; the first source of control voltage Eu I; a second timing resistor 8; a field-effect transistor 9, the drain of which is connected to a mitter of a bipolar transistor 6, the source is connected through a resistor 10 to a common bus O and to the first control voltage source Eu I; the gate is connected to the second source of control voltage EU 2 and to the resistor II.

The control generator operates as follows.

When power is applied to En, the charge of capacitor 3 begins through resistors 2 and 8 and through the output contact of element I. Transistor 6 is closed by a low potential at the output of element I. When the charge of capacitor 3 reaches the threshold input level of element I as a result of positive feedback through capacitor 3 to the output contact of the element I is set to a single high potential, which through the chain - resistor II, the capacitor 5 opens the transistor 6, on the collector of which a low potential is set. When mr, the channel of the transistor 9 is in a conducting state, when at its source and gate the potentials are equal to the potentials equal to the potential of the bus O, that is, Eu1 0u.

In this case, the discharge of the capacitor 3 along the chain begins: the output contact of the element I is the capacitor 3 resistor 2 - the collector - emitter of the transistor 6 - the channel of the transistor 9 - resistor 10 - common bus 0.

When the capacitor 3 is discharged, the potential at the output of element I decreases to a threshold value and as a result of an avalanche-like process and positive feedback through the capacitor 3, the low potential is again established at the output terminal of element I, and the transistor 6 is high at the collector. After that, the capacitor 3 is again charged through resistors 2 and 8 and the processes are repeated. In the time interval | the charge of the capacitor 3 through the resistors 2 and 8, the time constant does not change and is determined by the value of the capacitance of the capacitor 3 and the random value of the resistance of the resistors 2 and 8:

TK IV C (B 2 + R 8)

In the interval of the discharge of the co-capacitor 3, the discharge rate is determined by the resistor 2, transistors 6 and 9 and the potential levels controlling the absolute E tj I or E y 2.

The discharge rate of the codenser 3 and, accordingly, the frequency of the generator is determined by the level of potentials at the sources EyI and Et / 2. There are two options for controlling the frequency of the generator - at the input of EV I or at the input of Eu 2,

In the first case, a positive potential is supplied within the portion of the input characteristic of the transistor 9. As the potential increases, the channel resistance increases and the repetition rate decreases.

In the second case (at the input E y 2), a negative potential is applied to the gate relative to the common bus 0. With an increase in the negative potential, the resistance of the channel of the transistor 9 increases and the repetition frequency of INSC ZESOV decreases.

When using the input of the recovery E I, external circuits included in the re: 7Function or feedback circuit are connected to it, from which a positive potential corresponding to the problem being solved is supplied. In this case, the input Eu2 remains unused. If the control input EU 2 is used, then external circuits are connected to it from which a negative potential arrives at this input, correspond to the problem being solved.

Claims (1)

A controlled generator containing a first source of control voltage, a non-inverting logic element, to the input of which is connected a first time-setting resistor and a time-setting capacitor, the second output of which is connected to the output of the non-inverting logic element, and through a resistor shunted by a capacitor, to the base of a bipolar transistor connected to the resistor , the second output of the first timing resistor is connected to the collector of a bipolar transistor, characterized in that it is additionally introduced a second a timing resistor connected between the collector of the bipolar transistor and the power bus, the emitter of the bipolar transistor is connected to the table of the field-effect transistor, the source of which is connected to the first control voltage source and through the resistor to the common bus, the gate of the field-effect transistor is connected through the resistor to the common bus and to the second source control voltage.