Patent ID: 6344816
Filing Date: 2002-02-05
Classification: H03M

Abstract:
Mixed-signal circuitry comprising:analog circuitry having an input for receiving a digital control signal and operable to produce one or more analog signals in dependence upon the received digital control signal; and digital circuitry comprising: a main clocked circuit, clocked by an applied clock signal, and having an output connected operatively to said input of the analog circuitry for applying thereto said digital control signal and operable selectively to cause said digital control signal to change at times determined by said clock signal; a dummy clocked circuit, also clocked by said clock signal, which produces a dummy signal at an output thereof and is operable selectively to cause said dummy signal to change at said times; and control circuitry connected with both said clocked circuits and operable at one of said times at which no change occurs in said digital control signal to cause such a change to occur in said dummy signal, and also operable at one of said times at which there is such a change in said digital control signal to prevent such a change from occurring in said dummy signal.