Patent ID: 8089326

Claim:
A PVT-independent current-controlled oscillator, comprising: a PV-controller, the current of the PV-controller is intentionally made a function of the process and supply voltage variations; a current-controlled oscillator coupled to the PV-controller and outputting an oscillation frequency; and a T-controller coupled to the PV-controller and the current-controlled oscillator, providing a total current to be shared by the PV-controller and the current-controlled oscillator, wherein the current of the T-controller is intentionally made a function of temperature deviation, and the PV-controller decreases the shared current of the current-controlled oscillator by increasing the shared current of the PV-controller if the oscillation frequency is higher than a predetermined frequency due to a process variation of the current-controlled oscillator, and increases the shared current of the current-controlled oscillator by decreasing the shared current of the PV-controller if the oscillation frequency is lower than the predetermined frequency due to the process variation of the current-controlled oscillator, thereby dynamically adjusting the oscillation frequency.