| 摘要 |
PURPOSE: An oscillator circuit of a semiconductor apparatus is provided to generate an oscillation signal satisfying predetermined frequency error range by voltage level of output node, thereby controlling duty. CONSTITUTION: A first-level controlling unit(140) controls electric potential of output node based on voltage level difference between reference voltage and output node. A second-level controlling unit(160) is connected between power voltage terminal and ground voltage terminal. The second-level controlling part supplies power from the power voltage terminal to the output node. The first-level controlling part comprises a first discharging unit which discharges output node based on voltage difference of the reference voltage and the output node. The first discharging unit comprises PMOS transistor which permitted the reference voltage as gate. One end of the PMOS transistor is connected to the output node. The other end of the PMOS transistor is connected to the ground voltage terminal. [Reference numerals] (120) Reference voltage generating unit; (140) First-level controlling unit; (160) Second-level controlling unit |
