Patent ID: 6943633

Claim:
A ring oscillator, comprising: a plurality of stages in which an output of one stage is an input to a succeeding stage, such that the output of a last stage is input to a first stage, the output of the last stage being an output of the ring oscillator, each stage including a circuit having a gain, wherein at least one of the plurality of stages has an input electrically connected to an active negative capacitance circuit, the active negative capacitance circuit including an input device and an output device, the input and output devices being field effect transistors, the active negative capacitance circuit further including a first resistor and a second resistor electrically connected to a first and second field effect transistor, a first end of the first resistor being electrically connected to a drain of the first field effect transistor and a second end of the first resistor is electrically connected to a sate of the second field effect transistor.