JPS6277025A - Integrated circuit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application] The present invention relates to improvements in low power consumption of battery-powered integrated circuits.

[Four points of the invention] The present invention is based on the following points: [In the integrated circuit Q to be used], the power consumption is reduced by stating that the condition of the skin is the total low source of the step-down circuit output. When the battery is under heavy load and a large amount of current flows through the battery, the circuit system is operated by switching the power supply to the constant voltage circuit output in order to prevent malfunction due to voltage drop due to the internal resistance of the battery. This results in a low power consumption ratio and stable operation of the integrated circuit.

[Conventional technology]

Conventional battery-powered integrated circuits, especially lithium batteries @A
In dynamic integrated circuits, a capacitor is connected to the outside of the integrated circuit to supply the battery voltage, and the voltage that is strongly stepped down from the battery is used as a power source to excite the circuits inside the integrated circuit to reduce power consumption. Ta.

Alternatively, a constant pressure circuit is operated to adjust the battery voltage to a low pressure ratio, thereby achieving stable operation of integrated circuits and low power consumption.

[The problem and purpose to be solved by the invention] However, each conventional branch has the following problems.

First, if the output of the step-down circuit is used as a resting place for a hanging string inside an integrated circuit, for example, in an integrated circuit that has a buzzer output and a lamp output, such as a four-way clock (integrated circuit for watches), the buzzer will emit four lines, the lamp will When the battery is turned on, a large current flows through the battery, and the output voltage of the battery decreases due to the voltage drop due to the internal resistance of the battery, causing malfunction of the integrated circuit. Chrysoba, the output voltage of one battery is 5V, and the internal resistance is 15
0Ω, buzzer/l) Consumption of 4 pieces of iron during normal time etc. is 6
mA, the voltage drop at the internal resistance of the battery is [19V
Next door! The output voltage of the battery drops to 2.1V. Here, the actual bottom pressure applied to the circuit system inside the integrated circuit is 1.5 V under normal conditions, but it is 1.05 V under heavy load. Become.

Next, if the reverse voltage output is operated as a power source for the circuit inside the step-down circuit, malfunctions will be less likely to occur under heavy loads, but the voltage will be consumed in the constant voltage circuit, so the step-down circuit output will be used as the power supply voltage. Compared to summer use, the effect of the low magnetic force ratio is smaller.

[Means for solving the temporary problem]

The 1!21 integrated circuit of the present invention is: a) 1? b) A step-down circuit that steps down the voltage of the four cells with a capacitor, and C) A constant voltage circuit that lowers the voltage of the four cells with a constant voltage (5,
) Switch the output of the step-down circuit and the output of the constant voltage circuit to 1!
It is characterized by consisting of a circuit system used as a source.

[Please implement]

Hereinafter, implementation Aj of the present invention will be explained in detail.

FIG. 41 is a block diagram of an embodiment of an integrated circuit of the present invention. 1 is a battery, 5 is a step-down 11-way output, 4 is a step-down circuit output selection switch, 5 is a constant P voltage 1/11 path, 6 is a constant voltage circuit output selection switch, and 7 is a constant voltage circuit sampling switch.
The switch, 8 is the foot 4 pressure circuit output, and 9 is the circuit thread.

First, under normal conditions (not under heavy load), the step-down circuit output selection switch is turned ON, and the constant voltage circuit output selection switch 6 is turned OFF.
OFF, and the IL voltage circuit sampling switch 7 is also OFF.Therefore, the step-down circuit output 5 is given to the circuit system 9 as a voltage, reducing the power consumption in the i circuit system to 1°/7°. Further, since the constant voltage circuit sampling switch 7 < ) OFF, the i?ft4 force in the constant voltage circuit is also zero, and the power consumption of the entire integrated circuit is reduced.

When the arrow is under heavy load, 14 pressure circuit output selection switch 4 all 0F
FL, constant voltage circuit output selection switch 6 and constant - turn i
Drinking noblinog switch 71cm0Nfru.

At this time, the constant voltage circuit output 8 is given to the circuit system 9, and the output voltage of the battery 1 is 1 due to the voltage drop due to the internal resistance.
Stable operation is guaranteed even when the device is under control.

In the main case, the positive output of the r battery is used as a common river, but of course, even if the negative output of the battery is made common, the non-invention is obsolete.

[Effects of the Invention] As mentioned above, by using opacity, the integrated circuit of Yatunsuke, which is the best in the industry, has low power consumption, but is prone to malfunction when loaded.2. It is possible to realize an integrated circuit that has low power consumption and can be stably cut by combining the disadvantages of each of them, such as stable operation but high power consumption, and taking advantage of only the advantages.

[Brief explanation of drawings]

Kite 1 diagram shows a nest + that switches the output of the step-down circuit and the output of the constant voltage circuit of the present invention as a power source! FIG. 2 is a block diagram of a flo circuit. 1... Battery 2... Buck circuit 5... Buck circuit output 4... Buck circuit output selection switch 5... Constant voltage circuit 6... Constant voltage circuit output selection switch 7... Constant Voltage circuit sampling switch 8...Leg 4 output lU path output 9...Circuit thread

Claims (1)

[Scope of Claims] In a battery-driven integrated circuit, a step-down circuit that steps down the battery voltage using a capacitor, a constant voltage circuit that makes the battery voltage a constant voltage, and a switch between the step-down circuit output and the constant voltage circuit output. An integrated circuit characterized by consisting of a circuit system used as a power source.