SU425169A1 - CONSTANT VOLTAGE STABILIZER - Google Patents

Description

The known DC voltage regulator, containing its sequential regulating transistor, the output DLC filter, the control transistor multivibrator and the comparator, does not provide low levels of stabilized voltage, as well as stabilization of the voltage when the load current changes to zero.

To stabilize the voltage when the load current changes to zero, as well as to reduce the level of the stabilized base voltage of the multivibrator transistors, they are connected via resistors to the opposite pole of the additional source of bias voltage that is connected in series with the input of the stabilizer.

The drawing shows a diagram of the proposed stabilizer.

The stabilizer works as follows.

When the power is turned on at the first time, the comparison transistor 1 is closed. As a result, the multivibrator transistor 2 is also closed. The other transistor 3 of the multivibrator, as well as the regulating transistor 4, are open, and through the regulating transistor 4 and the inductor 5, the charge current of the capacitor 6 flows. The time during which the regulating transistor 4 is open is determined only by the charging time of the capacitor 6 to the nominal value of the stabilized tension

As soon as the voltage on the capacitor 6 exceeds the maximum allowed value

stabilized voltage, the comparison transistor 1 opens. As a consequence, transistor 2 is opened, and the multivibrator is switched. Transistors 3 and 4 are closed. Since the base of transistor 3 is connected

through the resistor 7 with the positive pole of the bias source 8, the transistors 3 and 4 remain closed until the voltage on the capacitor G falls below the allowable value of the stabilized voltage.

Due to this principle of operation, the output voltage is stabilized not only by iodine loading, but also at idle.

The minimum level of the output voltage is determined by the comparison circuit and can be quite low.

Subject invention

25

DC voltage regulator containing a series regulating transistor, output Z-LC filter, control transistor multivibrator and organ

Comparison, characterized in that, in order to stabilize the voltage when the load current changes to zero, as well as to reduce the level of the stabilized voltage, the bases of the multivibrator transistors are connected

through the resistors to the locking 1, to him with respect to them the pole of an additional source of constant bias voltage, which is connected by a different pole to the sequence o and according to the input of the stabilizer.