OSCILLATOR FOR PROVIDING CONSTANT OSCILLATION SIGNAL WITHOUT POWER VOLTAGE AND TEMPERATURE CHANGES, AND SIGNAL PROCESSING DEVICE FOR THE SAME

摘要

PURPOSE: A signal processing device is provided to generate a uniform oscillation signal by generating bias voltages after tracking temperature variation and controlling the bias current of an internal circuit according to the bias voltages. CONSTITUTION: A current bias circuit(110) generates bias voltages for supplying a bias current regardless of temperature variation by tracking temperature variation based on a control voltage which is outputted from a band gap reference circuit. A ring oscillator(120) compares differential output signals which are generated according to the bias voltages and generates an oscillation signal as the comparison result.