Patent ID: 8030904

Claim:
An oscillator circuit, comprising: a charge/discharge unit, for receiving a control signal, and performing a charge or discharge operation on a charge/discharge terminal according to the control signal; a first impedance, wherein a first terminal of the first impedance is electrically connected to the charge/discharge terminal of the charge/discharge unit; a second impedance, wherein a first terminal of the second impedance is electrically connected to the charge/discharge terminal of the charge/discharge unit; a voltage follower, wherein an input terminal of the voltage follower is coupled to a second terminal of the first impedance, and an output terminal of the voltage follower is coupled to a second terminal of the second impedance; a capacitor, wherein a first terminal of the capacitor is coupled to the input terminal of the voltage follower, and a second terminal of the capacitor is coupled to a reference potential; and a level detection circuit, wherein an input terminal of the level detection circuit is electrically connected to the charge/discharge terminal of the charge/discharge unit, and the level detection circuit generates the control signal to the charge/discharge unit according to the charge/discharge terminal of the charge/discharge unit.