CLOCK GENERATING CIRCUIT

摘要

PURPOSE: A clock generating circuit is provided to prevent a malfunction of system by improving an unstable oscillation caused by changing of operating point. CONSTITUTION: A clock generating circuit comprises: an oscillating element for starting an operation by an inputted trigger signal and outputting an oscillating signal swinging by reference to an operating point having a predetermined level; a transferring element for transferring the output of the oscillating element to the input of the oscillating element in response to a first and a second selection signal; a selection signal generating element for outputting the first and second selection signals after inverting and delaying a stop signal to stop the oscillation operation of the oscillating element; a pull-down element for pulling-down the potential of the input terminal of the oscillating element to the ground potential in response to the second selection signal; and a clock generating element for outputting a first and a second clock signals by inverting and delaying the output signal of the oscillating element.