High precision CMOS clock duty-cycle corrector

A CMOS clock duty-cycle correction circuit with high precision is described.The circuit is implemented in 90nm CMOS process and power supply voltage is 1V.The maximum frequency is 10GHz.The duty-cycle corrector is used to correct the duty-cycle of the clock to reduce the deterministic jitter introduced by the duty-cycle distortion.The circuits extract the duty-cycle information by differential charge pump and correct the clock distortion by a negative feedback loop.The simulation result shows that the residual error of the duty-cycle distortion is within 1%.