Delayed locked loop (DLL) circuit providing adjustable delay of periodic input signal, with controllable, series connected delay elements, as delay chain

摘要

Controllable delay elements (6) in series form delay chain (2) and phase detector (3) generates control signal, dependent on periodic input signal, and periodic signal delayed by delay chain.Circuit contains selection unit (7), coupled to each delay element to apply output signal of element to output of DLL circuit. Compensation circuit (9-11) modifies selection signal (AS) so that additional delay between periodic input and output signal of DLL circuit is compensated.