Feedback loop detection method for an electronic circuit and a feedback loop detection device for an electronic circuit

摘要

PROBLEM TO BE SOLVED: To facilitate detection of a feedback loop of all transistors in an electronic circuit.;SOLUTION: A voltage measurement section 16 is connected to a node between all elements that constitute an analog circuit 12 and a node between the elements and input/output terminals, wiring at the gate side of one transistor in an analog circuit 12 is disconnected, and a signal generation section 14 is connected to the node by the gate side. A voltage signal is generated from a signal generation section 14. When voltage is measured in the voltage measurement section 16, a gain existence detection section 20 and a feedback loop existence decision section 24 decides that a feedback loop exists in a transistor connected with the signal generation section 14 at the gate side. At that time, the feedback loop of the transistor is detected by a feedback loop detection section 26 in searching a wiring path from a connection node position of the signal generation section 14 to the connection node position of the voltage measurement section 16 in which the voltage is measured through the transistor.;COPYRIGHT: (C)2005,JPO&NCIPI