JPS63180118A - Power control circuit - Google Patents

Abstract

PURPOSE:To effectively control the generated power and to prevent the occurrence of noises by monitoring the temperature of a computer system which is detected by a temperature monitor control circuit and increasing and decreasing the working frequency in an adversely proportional way so that the power consumption is automatically controlled. CONSTITUTION:The temperature of a computer system 1 is monitored by a temperature monitor control circuit 5 via a temperature monitor signal 7. This signal 7 is converted into its proportional analog voltage through the circuit 5. This analog voltage is supplied to the system 1 via an A/D converter 8 and compared with the maximum and minimum set temperature levels. The results of these comparisons are outputted to a V/F converting circuit 10 via a D/A converter 9. The circuit 10 output the frequency inverse proportional to the input analog voltage to an oscillation circuit 12 as an oscillation signal 11. The circuit 12 performs the conversion of the oscillation output, etc., and finally outputs the working frequency of the system 1. In such a way, the temperature of the system 1 detected by the circuit 5 is monitored and increases and decreases the working frequency in an inverse proportional way. Thus it is possible to effectively control the generated power and to prevent the occurrence of noises.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applied to a computer system using CMOB parts used in an environment where the ambient temperature changes significantly, such as an artificial satellite in outer space. The present invention relates to a rectangular control device that can effectively control generated power according to changes in ambient temperature.

[Conventional technology]

There is a power switching method shown in FIG. 3 as a conventional method for controlling the power generated or consumed by nine circuits.

(1) Two computer systems, (2) a power switching circuit, (3) a power switching circuit 12) tl-
This is a strobe signal that turns on and off. Only when this strobe buoy No. W (3) occurs, the power switching circuit (
Power is supplied to #computer system +1) by 2).

(4) is a power switching inhibit gate, (5) is a temperature monitoring control circuit, and (6) is a switching enable signal.

Next, the operation will be explained. The temperature of the computer system fl) is monitored by a temperature monitoring control circuit (5). If the temperature is within the set range, the power switching enable signal (6) holds the L level,
From the power switching circuit (2) to the computer system (1)
) is continuously supplied with power. If the temperature exceeds the set value, the switching enable signal (6) goes high.
level, the power switching system stop gate (4) is on/off controlled by the strobe signal (3), and one power is supplied to the computer system (1) in a switching state by the power switching circuit (2). Thereby, the consumed power is averaged, and the supplied power can be kept low.

[Problem that the invention seeks to solve]

Since the conventional power switching system is configured as 9 or more, there is a problem in that the current changes are large when the supplied power is turned on and off, which causes noise generation.

This invention was made to solve the above-mentioned problems, and instead of turning on and off the power supply,
The purpose of this invention is to control the generated power by changing the operating frequency supplied to the MO8 circuit.

[Means for solving problems]

The power control device according to the present invention includes a temperature monitoring control circuit (
5), measure the temperature of the 9 circuits, generate a frequency inversely proportional to this temperature in the V/P conversion circuit, and generate I! i
If the temperature rises, m
The operating frequency is lowered, and if the temperature drops, the operating frequency is increased by 2 m, thereby controlling the generated power within the set value.

[Effect]

The temperature monitoring control circuit (5) according to the eighth aspect of the present invention performs control to generate an operating frequency inversely proportional to the rise in temperature or the fall in F when the temperature of the circuit of the computer system (1) is within a certain setting range. However, if the setting range is exceeded, the output of the operating frequency is automatically stopped.

Further, when the temperature returns from outside the set range to within the set range, the m operation frequency is initialized.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In Figure 1, (1) U is a computer system consisting of a CMOS digital circuit, (7) is a temperature monitor signal, and (8) is an analog voltage proportional to the temperature output from the temperature monitoring control circuit (5). (9) is a D/A conversion circuit that converts the digital data output from the computer system 〈υ into an analog voltage, and α1 is a D/DK conversion circuit ( 9)
Outputs a frequency change inversely proportional to the analog voltage output of v/
The y conversion circuit, aυ, inputs the oscillation fjiR signal with the operating frequency of 11, and α2 inputs the 9 oscillation signal αυ, converts the 1 oscillation voltage, forms tIjL, etc., and finally converts it to the computer system (11). ) is an oscillation circuit that outputs an operating frequency g. (3 is initialization data No. 16 of the D/A conversion circuit (9)).

FIG. 2 is an example of a graph showing the correspondence between the temperature detected by the temperature monitoring control circuit (5) and the corresponding oscillation signal Qυ output from the v/y conversion circuit a. T is the detected temperature axis, Tmaz is the maximum temperature setting value, and Twin is the minimum temperature setting value. T1ri is a high temperature region, T2 is an operating temperature region, and T3 is a low temperature region. Normally, operating temperature range T2
The power generated by the computer system (1) is controlled within the range of . f is a two-oscillation signal (fmax is 9 on the oscillation frequency axis of Iυ)
The maximum operating frequency of a circuit, fmin, is the minimum operating frequency of one circuit. Normally, the computer system (1) is executed between the maximum operating frequency fman and the minimum operating frequency fmin.

An embodiment of the present invention will be described below with reference to the drawings.

The temperature of the computer system (1) is determined by the temperature monitor signal (7)
The temperature is monitored by the temperature monitoring and control circuit (5). This temperature monitor signal (7) is connected to the temperature monitor control circuit (
5), it is converted into a proportional analog voltage.

This analog voltage is converted by a Mu/D conversion circuit (8).

Converted to parallel digital data and used in computer system (1)
input as temperature data. Computer system (1)
Now, use this temperature data as the enemy's large temperature set value Tmax.

Compare it with the minimum temperature setting value Tm1n, and if it is in the 9Mb operating temperature range T2, the D/A conversion circuit will output digital data that outputs a frequency corresponding to the graph between the maximum operating frequency fmax and the minimum operating frequency fmin. Output to (9). If the transition to high temperature region T1 and low temperature region T3 occurs, the digital data for stopping the two oscillations is
It is output to the conversion circuit (9).

Note that once you enter the range of the high temperature region T1 and the image source region T3, a total of J! ! The machine system (1) enters a stopped state.

When the operating temperature returns to T2, the temperature monitoring control circuit (5
), it is automatically determined whether the return is from the high-temperature region T1 or the low-temperature region T5, and the D/MU f-circuit (9) is set to correspond to the minimum operating frequency fmin or maximum operating frequency fmax, respectively. The digital data is set as the initialization data signal α3 in the D/A conversion circuit (9). D/
The Af conversion circuit (9) converts the digital data of the computer system (1) or the initialization data signal a3 into a proportional analog voltage KH2. V/? In the conversion circuit αQ,
An oscillation signal I that is inversely proportional to the analog voltage is generated and output to the 9 oscillation circuit a3. The oscillation circuit α2 is used to drive the computer system (11).

It performs processing such as level conversion, waveform shaping, and drive performance improvement, and outputs to the computer system (1). In this way, by monitoring the temperature of the fft computer system (1) detected by the temperature monitoring control circuit (5) and increasing or decreasing the operating frequency inversely, the power consumption can be reduced to 0 MO8! V2f
can be controlled automatically.

In the above embodiment, (although a computer system using a 3MOS digital circuit has been described, the generated power can be changed by 9 frequencies by configuring a circuit that can generate an oscillation frequency that is inversely proportional to the detected temperature) in a hardware manner. Applicable to all digital circuits.

〔Effect of the invention〕

As described above, according to the present invention, the temperature monitoring control circuit (5
), and the power consumption can be controlled by changing the operating frequency depending on the detected temperature.

This has the effect of preventing the occurrence of nozzles due to power on/off.

[Brief Description of the Drawings] Figures 1 and 2 are diagrams showing one embodiment of the present invention, and Figure 3 is a diagram showing an embodiment of the present invention.
The figure shows a conventional example. +1) U computer system, (2) is power switching circuit, (5) is temperature monitoring control circuit, (7) is temperature monitor signal, (8) is A/D conversion circuit, (9) is D/
A conversion circuit. αQ is a V/F conversion circuit, and α and others are oscillation circuits. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] Temperature monitoring and control circuits that measure the temperature of circuits such as computer systems that are made up of CMOS components that generate different power depending on the operating frequency, convert this temperature into voltage, and monitor it.This voltage is converted into digital data. A/D conversion circuit, the above-mentioned computer system that inputs this digital data, identifies the operating temperature, and outputs the result as digital data for frequency control, and A/D conversion that converts this output digital data into analog voltage. The circuit includes a V/F conversion circuit that generates an oscillation signal that is inversely proportional to this analog voltage, and an oscillation circuit that feeds back the oscillation signal as the operating frequency of the circuit of the computer system, etc., and the temperature of the circuit of the computer system increases. A power control circuit characterized in that the power generated by the circuit is controlled by lowering the operating frequency as the temperature increases and increasing the operating frequency as the temperature decreases.