Method for circuit inspection

A method for inspecting an electronic circuit formed on a board with a peripheral circuit comprising steps of:

• providing a terminal for inputting and outputting an electronic signal;
• providing an impedance increase means for increasing an impedance of an electrical connection between the electronic circuit and the peripheral circuit;
• and
• providing an inspection means for inspecting the electronic circuit,
• wherein the impedance increase means prevents inflow of an electric current from the peripheral circuit into the electronic circuit and/or outflow of the electric current from the electronic circuit to the peripheral circuit with a provision of an inspection signal shutoff state to the electronic circuit by the inspection means,
• the impedance increase means maintains prevention of the inflow of an electric current from the peripheral circuit into the electronic circuit with a provision of an inspection signal provision state to the electronic circuit by the inspection means in an electrical coupling with the terminal, and
• the impedance increase means provides an electrical connection between the electronic circuit and the peripheral circuit with a provision of the inspection signal shutoff state to the electronic circuit by the inspection means.

A method for inspecting an electronic circuit implemented on a board with a peripheral circuit by using an inspection means comprising steps of:

• providing an impedance increase means;
• and
• providing a terminal,
• wherein the impedance increase means is utilized to prevent inflow of an electric current from the peripheral circuit into the electronic circuit and/or outflow of the electric current from the electronic circuit to the peripheral circuit before inspection,
• the inspection means is utilized to provide an inspection signal to the electronic circuit with an electrical coupling between the electronic circuit and the inspection means through the terminal in addition to an utilization of the impedance increase means for maintaining prevention of the inflow of an electric current from the peripheral circuit into the electronic circuit during the inspection, and
• the impedance increase means is utilized to provide the electrical coupling between the electronic circuit and the peripheral circuit after the inspection.

An inspection system for inspecting an electronic circuit disposed on a board with a peripheral circuit comprising:

• a terminal for inputting and outputting an electronic signal;
• an impedance increase means for increasing an impedance of an electrical connection between the electronic circuit and the peripheral circuit;
• and
• an inspection means for inspecting the electronic circuit,
• wherein the impedance increase means prevents inflow of an electric current from the peripheral circuit into the electronic circuit and/or outflow of the electric current from the electronic circuit to the peripheral circuit before inspection of the electronic circuit by the inspection means,
• the inspection means inspects the electronic circuit by electrically coupling the terminal with the electronic circuit and by performing input and output of inspection signal between the inspection means and the electronic circuit, and
• the impedance increase means electrically couples the electronic circuit with the peripheral circuit after the inspection.