Oscillator

A MEMS oscillator, comprising:

• an oscillator unit being capable of outputting an output from an amplifier as an original oscillator signal that includes a feedback type oscillator circuit having a MEMS resonator and the amplifier, and an automatic gain controller receiving the output from the amplifier and controlling a gain of the amplifier based on a level of the output to maintain a level of the output from the amplifier constant;
• and
• a corrector unit that receives the original oscillator signal and generates from the original oscillator signal a signal of a predetermined set frequency to output the generated signal of the predetermined set frequency as an output signal,
• wherein the corrector unit receives, separately from the original oscillator signal, an information signal that includes a signal containing information on a gain at a resonance frequency of the MEMS resonator from the oscillator unit, corrects a frequency of the original oscillator signal based on the information signal to generate the signal of the predetermined set frequency, and outputs the generated signal of the predetermined set frequency as the output signal, and
• wherein the information signal is a control signal that is output from the automatic gain controller for controlling the gain of the amplifier.