Patent ID: 6154076
Filing Date: 2000-11-28
Classification: H03K

Abstract:
A phase-alignment circuit, comprising:first, second, third, and fourth current sources;a first capacitor connected to be charged by said first current source at a first charge rate and discharged by said second current source according to an input signal;a second capacitor connected to be charged by said third current source at said third charge rate and discharged by said fourth current source;control logic connected to said current sources to control charging of said second capacitor and discharging of said first capacitor according to transitions in said input signal, and to control discharging of said first capacitor at a second rate, which is faster than said first rate, after the voltage across said first capacitor has become equal to the voltage across said second capacitor;an output stage connected to produce an output signal according to the voltages across said first and second capacitors;wherein said first and second capacitors are alternately charged and discharged according to said input signal.