OSCILLATOR CAPABLE OF OPERATING AT MULTI-FREQUENCY

摘要

An oscillator operating in multi-frequency is provided to operate in multi-frequency by controlling an operation frequency and to secure enough noise margin. An oscillator(300) operating in multi-frequency includes an oscillation part, a feedback part(330). The oscillation part performs oscillation, is connected between a terminal(XIN) and the terminal(XOUT), generates a sine wave having a predetermined oscillation frequency, and inputs the sine wave to a predetermined semiconductor device. The semiconductor device converts the inputted sine wave to a square wave and uses the square wave as a clock. The oscillator(300) further includes a buffering part(320) and an input control part(310). The buffering part(320) buffers the sine wave having the predetermined oscillation frequency and inputs the buffered sine wave to the semiconductor device. The input control part(310) controls operations of the oscillator(300) as an option circuit of the oscillator(300).