Multi-frequency-point RC oscillator

The invention discloses a multi-frequency-point RC oscillator, and relates to the technical field of integrated circuits. The oscillator comprises a frequency selection module, a charging and discharging module, a transmission gate module and a comparison output module. The frequency selection module is connected to the charging and discharging module and the transmission gate module through a first switch, and the frequency selection module and the charging and discharging module are connected to the comparison output module through the transmission gate module; the frequency selection modulecomprises a plurality of resistors and a selector connected to the plurality of resistors, and the selector switches on part or all of the plurality of resistors according to the received frequency selection signal so as to output different first voltages to the transmission gate module; and the transmission gate module outputs the first voltage output by the frequency selection module and the second voltage of the charg