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Output circuit, temperature switch ic, and battery pack

一种输出电路、温度开关的技术，应用在输出电路领域，能够解决输出电路面积变大等问题，达到面积小的效果

Inactive Publication Date: 2012-08-01
SII SEMICONDUCTOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In the conventional output circuit, the size of the NMOS transistor 94 is large, so there is a problem that the area of ​​the output circuit becomes large.

Method used

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  • Output circuit, temperature switch ic, and battery pack
  • Output circuit, temperature switch ic, and battery pack
  • Output circuit, temperature switch ic, and battery pack

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Embodiments of the present invention will be described below with reference to the drawings.

[0022] figure 1 It is a circuit diagram showing the output circuit of this embodiment.

[0023] The output circuit 10 has PMOS transistors 11 and 12 , NMOS transistors 21 and 22 , and a current source 31 .

[0024] The gate of the PMOS transistor 11 is connected to the input terminal of the output circuit 10 , the source is connected to the drain of the PMOS transistor 12 , and the drain is connected to the gate of the NMOS transistor 22 . The gate of the NMOS transistor 21 is connected to the input terminal of the output circuit, the source is connected to the ground terminal (power supply terminal on the ground voltage side), and the drain is connected to the gate of the NMOS transistor 22 . The gate of the PMOS transistor 12 is connected to a ground terminal, and the source is connected to a power supply terminal (power supply terminal on the power supply voltage side). ...

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PUM

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Abstract

An output circuit has a smaller area and restrains outputs from becoming unstable even if a power supply voltage is lower than an operating voltage. A supply terminal of an inverter circuit is provided with switch circuit, and the switch circuit stops the operation of the inverter circuit when the power supply voltage is lower than the operating voltage of the circuit. Further, the output terminal of the inverter circuit is provided with a current source to fix the output to the power supply voltage when the operation of the inverter circuit is stopped.

Description

technical field [0001] The invention relates to an output circuit with a single-side output of high impedance, in particular to an output circuit that can work stably when the power supply voltage is low. The present invention also relates to a temperature switch IC and a battery pack including the output circuit. Background technique [0002] Describe the existing output circuit. Figure 7 It is a circuit diagram showing a conventional output circuit. [0003] A conventional output circuit has an inverter 97 connected to an input terminal, an NMOS transistor 93 as an output driver, a diode-connected NMOS transistor 95 and a capacitor 96 provided between a power supply and ground, and an NMOS transistor controlled by the above components. Transistor 94. [0004] When the circuit is powered on, the power supply voltage VDD gradually increases. When the power supply voltage VDD is lower than the threshold voltage Vthn95, the NMOS transistor 95 is non-conductive. The capaci...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/687
CPCH02J7/0031H02J7/047H02H5/04H03K17/20H03K19/0013H03K19/018521H03K19/00361H02J7/04H02J7/007194A63B67/045A63B71/04A63B2208/12
Inventor 三谷正宏平冈直洋杉浦正一五十岚敦史
Owner SII SEMICONDUCTOR CORP