Patent ID: 8305149

Claim:
A semiconductor circuit apparatus having a clock oscillating circuit comprising: a first inverter circuit having a power supply terminal connected to a power supply potential via a first power supply potential connection transistor and a ground terminal connected to a ground potential via a first ground potential connection transistor; a second inverter circuit connected to the power supply potential via a second power supply potential connection transistor and to the ground potential via a second ground potential connection transistor, the second inverter circuit being electrically connected to the first inverter circuit in parallel; and a selection circuit block that is configured to independently turn on any one of the first and second power supply potential connection transistors by outputting a power supply potential connection signal to any one of gate terminals of the first and second power supply potential connection transistors and to independently turn on any one of the first and second ground connection transistors by outputting a ground potential connection signal to any one of gate terminals of the first and second ground potential connection transistors.