JPH0468958A - Telephone set - Google Patents

Abstract

PURPOSE:To attain low current consumption drive by controlling the current to activate only an IC corresponding to a requested function. CONSTITUTION:A three-terminal regulator 1 for power supply adjusts a power voltage to a prescribed voltage to supply power to IC groups 3 5 to realize various functions of a microcomputer 2. Each of power supply changeover circuits 9-11 consists of a transistor(TR), resistors R1, R2 and a diode D and is controlled by the microcomputer 2. That is, the microcomputer 2 controls the operation of the power supply changeover circuits 9-11 added to a power input terminal of each of the IC groups 3-5 to supply the current only when each of the IC groups 3-5 is in operation. Thus, lots of ICs are driven with a low current consumption at the drive with a station power supply only.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a telephone device that can be driven with low current consumption.

Conventional technology FIG. 2 shows the configuration of a conventional telephone device.

In FIG. 2, numeral 1 is a three-terminal regulator for power supply, which supplies power to the microcomputer 2.

3, 4.5 are IC groups for realizing various functions, and input signals to the telephone set 8, respectively. 6 is a three-terminal regulator for supplying power to the IC groups 3, 4.5, and 7 is an ACl
This is an AC adapter that converts oov power into a predetermined power source.

Next, the operation of the above conventional example will be explained. In FIG. 2, the microcomputer 2 controls each IC group 3.4.5, so that the telephone 8 can have various functions. By supplying power to each IC group 3.4.5 from an external power source through the AC adapter 7, regulator 6, etc., it is possible to satisfy the functions of a plurality of ICs.

In this way, even in the conventional telephone device described above, a single microcomputer (CPU) can control a plurality of ICs and realize various functions.

Problems to be Solved by the Invention However, in the conventional telephone device described above, multiple IC groups operate even in the standby state, resulting in large current consumption. There was a problem in that 8 external power supplies were required.

The present invention is intended to solve these conventional problems, and aims to provide a telephone device that can control multiple IC groups with low current consumption and realize various functions. It is something.

Means for Solving the Problems In order to achieve the above object, the present invention adds a power supply switching circuit to the power input terminal of each IC group that drives the telephone, and controls the circuit using a microcomputer (CPU). It is something.

Effects The present invention has the following effects due to the above configuration. That is, a microcomputer (CPU)
By controlling the operation of the power supply switching circuit added to the power supply input terminal of group C, current is supplied only when each IC group is operating, and the current consumption can be controlled, so when only the local power supply is driven, This has the effect that more ICs can be driven when low current consumption is required.

Embodiment FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, 1 is a three-terminal regulator for power supply, which adjusts the power supply voltage to a predetermined voltage and supplies power to IC groups 3, 4.5 for realizing various functions of the microcomputer 2. Is going.

9, IQ, and 11 are power supply switching circuits connected to the original terminals of each IC group 3, 4.5, and each transistor Tr
, resistors R4, R2, and a diode D, and is controlled by the microcomputer 2. 8 is a telephone.

Next, the operation will be explained. When the regulator 1 applies a driving voltage to the microcomputer 2, the microcomputer 2 starts operating. Now, when there is a request for the function of IC3 from the telephone 8 side, the microcomputer 2
The power supply switching circuit 9 of No. 3 is activated. That is, the diode D becomes conductive according to the instruction from the microcomputer 2, the voltage divided by the resistors R1 and R2 makes the transistor Tr conductive, and the voltage from the regulator 1 is supplied to the ICs.
IC3 is driven. During this time, IC4 and IC5 do not operate.

The power supply switching circuits 10 and 11 for IC4 and IC5 are similarly operated according to instructions from the microcomputer 2 when there is a request. In this way, microcomputer 2
When controlling each IC group 3, 4.5, each IC group 3, 4.
．． By selectively controlling the power supply switching circuits 9, 10, and 11 added to the power supply 5, power is supplied only to the ICs required for the required functions, and the R current of the equipment is controlled. At the same time, it is possible to realize various functions capable of driving with low current consumption, and has the effect that an external power source dedicated to driving the IC, such as an AC adapter, is not required.

Effects of the Invention As is clear from the above-mentioned embodiments, the present invention makes it possible to control the current to operate only the IC corresponding to the required function when driving a telephone. It is possible to drive current consumption and does not require a dedicated external power source such as an AC adapter, so it has the advantage of being able to reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram of a telephone device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional telephone device. 1.6...3-terminal regulator for power supply, 2...
...Microcomputer (CPU), 3,4.5
...IC group, 8...Telephone, 9,10
．． 11...Power switching circuit.

Claims (1)

[Claims] A telephone device comprising an IC group that controls predetermined functions of the telephone, a power supply circuit connected to each IC group to supply power, and a microcomputer that selectively switches and controls the power supply circuit.