We demonstrate a chip-scale scheme of Brillouin instantaneous frequency measurement[IFM]in a CMOS-compatible doped silica waveguide chip.In the chip-scale Brillouin IFM scheme,the frequency-to-power mapping process is achieved by one-shot detection without additional time averaging and implemented by lock-in amplification,which successfully detects the Brillouin gain of the doped silica waveguide chip in the time domain.A Costas frequency modulated signal ranging from 8 GHz to 9 GHz is experimentally measured,and the frequency measurement errors are maintained within 58 MHz.