A crystal oscillator emulator integrated circuit, comprises a first temperature sensor that senses a first temperature of the integrated circuit; memory that stores calibration parameters and that selects at least one of the calibration parameters based on the first temperature; a semiconductor oscillator that generates an output signal having a frequency that is based on the calibration parameters; and an adaptive calibration circuit that adaptively adjusts a calibration approach for generating the calibration parameters based on a number of temperature test points input thereto.