JPS5960521A - Voltage stabilizing circuit - Google Patents

Abstract

PURPOSE:To save electric power by connecting in series plural circuits, and providing a circuit for absorbing an unbalanced portion of a current of plural circuits concerned in the connecting point of plural circuits concerned. CONSTITUTION:Function circuits 2'', 3'' are connected in series to an electric power source 4, and a by-passing circuit of an unbalanced portion of a current of its connecting point 5 is constituted of transistors 8, 9, resistances 10-13 and diodes 14, 15. The reference voltage of the transistors 8, 9 is determined by voltage V of the resistances 12, 13 and the electric power source 4. The diodes 14, 15 reduce power consumption in case when the transistors 8, 9 are operated, by operating the transistors 8, 9 by B class bias. Also, the resistances 10, 11 are protective resistances of the respective transistors 8, 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to a voltage stabilizing circuit that stabilizes a power supply voltage when it is supplied from a single power supply to one or more circuits.

fbl technology background In recent years, there has been a tendency for electronic circuits to become more integrated.

At this time, a plurality of electronic circuits are combined into one chip. In this case, generally, the voltage is supplied to the 1111i1 chip from the 1 flfrl power supply, so the multiple electronic circuits have the above 1 (III
Voltage will be supplied from the power supply of I. In such a circuit type, it is required to reduce the power consumption of one circuit and to be able to set initial variations in voltage values due to variations in the elements of the chip to suit the design.

(C1 Prior Art and Problems) The circuit types described in the background of the technology described in section 2 include those in which electronic circuits are connected in parallel to a power supply and those in which electronic circuits are connected in series.

Hereinafter, the case where the functional circuits of each device are connected in parallel and the case where they are used in series connection with respect to the power supply will be explained with reference to FIGS. 1 and 2, respectively.

FIG. 1 shows a state in which each functional circuit constituting a conventional device is connected in parallel to a main power source. In the figure, each functional circuit 2.3 in each device 1 of the electronic device is connected in parallel to a power supply 4, and the load current 1.3 is connected in parallel to a power supply 4. .

I2 flows. However, the power inside one device 1 is
It looked like Type 1 and was quite large.

P=VX (1+I) -----
(1112 where l) is electric power (W) and V is power supply voltage [■].

1, I2 is the load current [A].

Therefore, when the four types of functional circuits 2 and 3 are used in parallel connection to the power supply 4, there is a drawback that the scale of the internal circuit M3 is reduced due to power generation, and the original purpose of the integrated technology is lost. .

For this reason, if the voltage of one functional circuit 2.3 can be lower than the rated voltage of the power source 4, the functional circuit 2.3 may be connected in series with the power source 4 and used.

In this case, the power within the two devices 1 is as shown in equation (2).

Compared to when the functional circuits 2 and 3 are connected in parallel to the power supply, the power consumption can be reduced to about 2.

P −V X I n ---(
21 However, P is the power, ■ is the power supply voltage CV), and In is the larger current value (A
).

However, when connecting a single functional circuit in series to a power supply,
As the absolute value deviation of the elements within the IC is large, an unbalance in the operating current occurs, and the voltage at the midpoint differs depending on the manufacturing loft.

For this reason, conventionally, when a single-function circuit is connected in series to a power supply, it is as shown in FIG.

It took the form of a circuit.

Hereinafter, a conventional example in which the functional circuits of each device are connected in series to a main power source will be described with reference to FIG.

In Fig. 2, when the functional circuits 2' and 3' of two devices 1 are connected in series with respect to the rated voltage V of the main power supply 4, the respective operating currents IJ and 2 of the two functional circuits 2' and 3' are is l, l>+: Also, when bow'<1, the difference in the currents generated at the connection point 5 of the circuits 2' and 3' is △J-15
A resistor 6 or 7 was used as a circuit to absorb ~1ν.

However, since the absolute value deviation of the element value in Ic due to the manufacturing loft of these functional circuits 2' and 3' is large, the operating current of the functional circuits 2' and 3' including the bypass resistor is accurately supplied without difference. This was a huge problem. Also resistance 6.
7 is required to have the function of a constant voltage circuit for the functional circuits 2' and 3', so the resistor 6.7 is connected to the functional circuits 2' and 3'.
′ It was necessary to flow several times the current. There was a drawback that the original purpose of lowering voltage and power consumption could not be achieved.

(d) The invention is described in 1. ! ! In order to solve the problem of IC issues, we developed a novel method that connects the functional circuits of each device in series to the main power supply to reduce the power consumption in the ICs that make up the functional circuits, and to obtain a constant intermediate voltage regardless of the manufacturing loft. The purpose is to provide a voltage stabilization circuit.

(e+ Structure of the Invention In order to achieve the above object, the present invention provides a method for supplying voltage from an i-power source to each device constituting the electronic device, by applying voltage to the single power source to a plurality of devices constituting the device. The circuit is connected in series, and includes a circuit that absorbs an unbalanced portion of the current of the plurality of circuits at the connection point of the plurality of circuits,
The present invention is characterized in that a predetermined voltage is supplied to the plurality of circuits by absorbing the unbalanced current.

(fl　Embodiments of the invention The present invention will be explained below based on the drawings.

FIG. 3 shows an embodiment of the invention. Nine functional circuits 2'' and 3'' are connected in a 1U series in line with the power supply 4, and a bypass circuit for the current imbalance at the connection point 5 is connected to the transformer 8.9. resistance 1
0, 11, 12, 13. It consists of diodes 14 and 15.

In the figure, an NPN (or f) NI) transistor 8 and a PNP (or NPN) 1-run transistor 9 are connected in series, and these transistors 8°9
The reference voltage is determined by the resistors 12 and 613 and the voltage of the main power source 4. The diode 1"14.15 is an element for biasing the run rasters 1 to 8 and 9 to class B, and by operating the h run rasters 8 and 9 with a class 8 bias, the 1-
There is a way to reduce the power consumption of the operations of the Run Sisters 8 and 9. Further, resistors 10 and 11 are protection resistors for the respective transistors 8 and 9.

In the above circuit configuration, the current relationship between the current arc of the dual-function circuit 2'' and the current 14 of the functional circuit 3'' is 1°>1. When , the transistor 9 generates J and the difference in current between the two is △I=I,
−1, flows to the l·runsistor 9. Also, 1. I
The current relationship is 1. <I.

When , transistor 8 operates and the difference between the currents △I
=I, -1, flows into the transistor 8, absorbs the unbalanced current Δ■ between the two, and supplies a stable constant voltage to the functional circuit 2'3'.

In the second circuit below, an NPN1 transistor was used for the transistor 8, and an NP transistor was used for the transistor 9]・A PNP was used for the transistor 8,
- The present invention can be applied even if NPN is used for the transistor.

According to the present invention, two functional circuits are connected in series to a main power source that supplies a constant voltage, and current imbalance between the functional circuits is reduced by one transistor, one resistor, and one transistor. .

A voltage stabilizing circuit that can save power by absorbing the voltage through the bypass circuit 12& formed by a diode can be realized. The advantage of this power saving is that it can suppress heat generation in the functional circuit integrated into an IC and increase the scale of the IC circuit.
- to do.

[Brief explanation of the drawing]

゛Figure 1 shows a voltage stabilization circuit of a conventional functional circuit. FIG. 2 shows a voltage stabilizing circuit in which the current unbalance of functional circuits connected in series is absorbed by a resistor circuit, and FIG. 3 shows an embodiment of the present invention. In the figure, 1 is an electronic device, 2. 2', 3'. 4' is the functional circuit, 4 is the main power supply, 5 is the functional connection point, 6
, 7.10 to 13 are resistors, 8.9 are transistors, 14
．． 15 does not indicate a diode.

Claims (1)

[Claims] When supplying voltage from a single power supply to each device constituting the electronic device, a plurality of circuits constituting the device are connected in series to the single power supply, and the voltage at the connection point of the plurality of circuits is A voltage stabilizing circuit comprising a circuit that absorbs an unbalanced portion of current in the circuit at the connection point, and supplies a predetermined voltage to the plurality of circuits by absorbing the unbalanced current.