SU721810A1

SU721810A1 - Stabilizer of bipolar dc voltage

Info

Publication number: SU721810A1
Application number: SU772552529A
Authority: SU
Inventors: Валерий Антонович Попович; Николай Семенович Федосимов
Original assignee: Предприятие П/Я М-5181
Priority date: 1977-12-07
Filing date: 1977-12-07
Publication date: 1980-03-15

Description

1one

Изобретение относитс к области электрорадиотехники , а именно к источникам питани , и может быть использовано в системах питани устройств автоматики и вычислительной техники.The invention relates to the field of electrical radio engineering, namely to power sources, and can be used in power supply systems of automation devices and computer equipment.

Известны двухпол рные стабилизаторы, содержащие регулирующие транзисторы, усилитель посто нного тока, источник опорного напр жени , выходной делитель 1.Two-pole stabilizers are known, which contain control transistors, a DC amplifier, a reference voltage source, and an output divider 1.

Наиболее близким техническим решением к данному изобретению вл етс стабилизатор двухпол рного напр жени посто нного тока, содержащий включенные в плюсовую шину последовательно соединенные первый регулирующий транзистор и первый ограничитель тока, и в минусовую щину - второй регулирующий транзистор и второй ограничитель тока, между плюсовым выходным выводом и общей шиной включены последовательно соединенные первый резисторный делитель и источник опорного напр жени . Средн точка первого резисторного делител подсоединена к инвертирующему входу подключенного параллельно разнопол рным выходным выводам первого усилител , выход которого через первый стабилитрон подключен к базе первого регулирующего транзистора, а между разнопол рнымиThe closest technical solution to the present invention is a bipolar DC voltage regulator, comprising a first control transistor and a first current limiter connected in series to the positive bus, and a second control transistor and a second current limiter between the positive output terminal in the negative busbar and a common bus connected in series the first resistor divider and the source of the reference voltage. The midpoint of the first resistor divider is connected to the inverting input of the first amplifier connected in parallel to the opposite-polarity output terminals, the output of which is connected to the base of the first regulating transistor through the first Zener diode, and between the opposite-polarity

выходными выводами подключены второй усилитель и второй резисторный делитель, средн точка которого подсоединена к инвертирующему входу второго усилител , выход которого через второй стабилитрон подключен к базе второго регулирующего транзистора, причем неинвертирующие входы первого и второго усилителей подсоединены к общей шине 2.the output terminals are connected to the second amplifier and the second resistor divider, the midpoint of which is connected to the inverting input of the second amplifier, the output of which is connected to the base of the second regulating transistor through the second zener diode, and the non-inverting inputs of the first and second amplifiers are connected to the common bus 2.

Недостатком таких стабилизаторов напр жени вл етс то, что при перегрузкеThe disadvantage of such voltage stabilizers is that when overloaded

или коротком замыкании одного из его выходов усилители рассогласовани станов тс неработоспособными вследствие пропадани одного из питающих напр жений, что приводит к насыщению регулирующего элемента противоположного по знаку выхода, т.е. к попаданию на выход стабилизатора нестабилизированного входного напр жени .or the short circuit of one of its outputs, the error amplifiers become inoperable due to the loss of one of the supply voltages, which leads to saturation of the regulating element opposite in output sign, i.e. to hit the output of the stabilizer unstabilized input voltage.

Целью изобретени вл етс расширение функциональных возможностей и повыщение надежности.The aim of the invention is to enhance the functionality and increase reliability.

Claims

The goal is achieved by the fact that in a two-pole DC voltage regulator containing a first control transistor and a first current limiter connected in the positive terminal, and a second control transistor and a second current limiter in the busbar, between the positive output terminal and the common bus connected in series the first resistor divider and the source of the reference voltage, the midpoint of the first resistor divider is connected to the inverting input The first amplifier connected in parallel to the opposite output outputs, the output of which is connected to the base of the first regulating transistor through the first Zener diode, and between the opposite output outputs are connected the second amplifier and the second resistor divider, the midpoint of which is connected to the inverting input of the second amplifier, the output of which is through the second the zener diode is connected to the base of the second regulating transistor, and the non-inverting inputs of the first and second amplifiers are connected to a common bus, d a transistor of the opposite conductivity type, whose collectors are connected to the bases of the transistors governing whose emitters are coupled and connected to a common bus, and the base are combined and connected to an intermediate point of the second resistor divider. The drawing shows an electrical circuit of a bipolar direct current voltage regulator. The stabilizer contains the first regulating transistor and the first current limiter 2, the second regulating and the transistor 3 and the second current limiter 4, the first resistor divider 5, the source of the reference eg; 6, the first amplifier 7, the first Zener diode 8, the second amplifier 9, the second resistor divider 10, the second Zener diode P. transistors 12, resistors 13 and 14. The stabilizer works as follows. The non-inverting inputs of the error amplifiers are grounded, i.e. the bearing stresses applied to them are zero. Between the positive output and the source of the reference voltage 6, a resistor divider 5 is switched on, the voltage from the midpoint of which is fed to the inverting .iiii input of the error amplifier 7 at the positive output. Between the negative and positive outputs there is a resistor divider 10, the voltage from the midpoint of which is fed to the inverting input of the error amplifier 9 via the negative output. Therefore, in the steady state, the potentials of the middle points of the divisors must be zero. If this is not the case, then at the outputs of amplifiers 7, 9, the mismatch signals are applied to the TC, which act on the regulating elements of the stabilizer so that the output voltages change in the appropriate direction and the voltages on the inverting inputs of the error amplifiers are zero. After that, the voltage at the negative output will be equal in absolute value to the voltage at the positive output. If one of the terminals is overloaded or short-circuited, the voltage at this output decreases and in the limit tends to zero, i.e. mismatch amplifiers lose one of the supply voltages and become inoperable. The mismatch signal, appearing at the midpoint of the divider 10, is applied to the bases of the additional transistors 12 of different conductivity types. Depending on the polarity of the error signal, one of the transistors opens and closes the regulating element of the second output. Thus, when overloading or short-circuiting one of the outputs of the stabilizer, the voltage at the other output is also close to zero. The use of the invention: the ability to expand the functionality of a voltage regulator by synchronously reducing the output voltage of the different voltages in the event of an overload or short circuit of one of the outputs of the stabilizer. DETAILED DESCRIPTION OF THE INVENTION A bipolar direct current voltage regulator comprising 1 in series a first control transistor and a first current limiter connected in the positive bus and a second control transistor and a second current limiter in the negative bus, in the positive output terminal and a common bus connected in series the first resistor divider and the voltage source, the middle point of the first resistor divider, is connected to the inverting input of the parallel connected but different output pins, the first amplifier, the output of which is connected to the base of the first regulating transistor through the first Zener diode, and a second amplifier and a second resistor divider, the midpoint of which is connected to the inverting input of the second amplifier, whose output is through the second The zener diode is connected to the base of the second control transistor, and the non-inverting inputs of the first and second amplifiers are connected to a common bus, characterized in that Enhanced functionality and increased reliability introduced two transistors of opposite conductivity type, the collectors of which are connected to the bases of control transistors, the emitters are combined and connected to the common bus, and the bases are combined and connected to the midpoint of the second resistor divider. Sources of information taken into account in the examination 1.G. “Electronics, 1973, No. 4, p. 43, Fig. 1.

2. Ж «Electronics, 1974, № 20, p. 54.