Protective circuit for protecting chip from misoperation
AssigneeHon Hai Precision Industry Co., Ltd.
InventorHeng-Chen Kuo
Life of this patent
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Abstract
A protective circuit for a chip includes an input terminal for receiving a power supply voltage, an output terminal for outputting a driving voltage to the chip, a first BJT and a second BJT. A base of the first BJT is connected to the input terminal and an emitter of the first BJT is grounded. A collector of the first BJT is coupled to the input terminal via a first terminal. A base of the second BJT is connected to a collector of the first BJT and an emitter of the second BJT is coupled to the input terminal via a second resistor and is connected to the output terminal. A collector of the second BJT is grounded.
Claims14
A protective circuit for protecting a chip from misoperation, the chip comprising a first end receiving a power supply voltage and a second end, the protective circuit comprising:
- an input terminal for receiving the power supply voltage;
- an output terminal for outputting a driving signal to the second end of the chip;
- a first Bipolar Junction Transistor (BJT) comprising a base connected to the input terminal, an emitter being grounded, and a collector coupled to the input terminal via a first resistor;
- and
- a second BJT comprising a base connected to the collector of the first BJT, an emitter coupled to the input terminal via a second resistor and connected to the output terminal, and a collector being grounded.
A protective circuit for protecting a chip from misoperation, the chip comprising a first end receiving a power supply voltage and a second end, the protective circuit comprising:
- a voltage detecting circuit for detecting a value of a power supply voltage, the voltage detecting circuit comprising an input terminal receiving the power supply voltage and an output terminal outputting a control signal;
- and
- a voltage driving circuit to turn on or turn off the chip by outputting a driving signal to the second end of the chip according to the control signal from the voltage detecting circuit, the voltage switching circuit comprising an input terminal receiving the control signal and an output terminal connected to the second end of the chip.
A circuit for ensuring normal operation of an electronic component, comprising:
- a voltage detecting circuit electrically connectable to a power source electrically connectable with an electronic component, said voltage detecting circuit capable of detecting a current status of said power source and providing a control signal based on said current status, said voltage detecting circuit being adjustable according to at least one requirement of said electronic component in order to perform said detecting;
- and
- a voltage driving circuit electrically connectable between said voltage detecting circuit and said electronic component, said voltage driving circuit capable of accepting said control signal from said voltage detecting circuit, and controlling said electronic component to be in a selective one of an active state thereof and an inactive state thereof according to said control signal.
Dependencies are inferred from the claim text.