Patent ID: 9703307
Date: 2017-07-11
CPC Classifications: G05F

Claim:
1. An integrated circuit comprising: a first power source circuit configured to generate a first power source voltage from a base voltage that is supplied from the outside; a voltage dropping circuit configured to generate a second power source voltage by dropping the first power source voltage and to output the second power source voltage to a second node; and a logic circuit configured to operate based on a third power source voltage, wherein: the third power source voltage is generated from the base voltage when the second power source voltage is lower than the base voltage, and is generated from the second power source voltage generated by the voltage dropping circuit after the second power source voltage reaches the base voltage, and the voltage dropping circuit includes: wherein, during a non-normal operation, when the second power source voltage is higher than the first power source voltage, a second intermediate voltage of the first terminal is applied to the back gate of the diode-connected transistor, and the back gate variable diode circuit turns off.