Patent ID: 6774691
Filing Date: 2004-08-10
Classification: H03K,H03L

Abstract:
A delay chain comprising:a plurality of delay elements coupled in series, each delay element introducing substantially a unit delay; a switching network, the switching network having a plurality of inputs coupled to respective outputs of the delay elements and first and second outputs, the first output being selectively coupled to an output of one of a first subset of the plurality of delay elements, and the second output being selectively coupled to an output of one of a second subset of the plurality of delay elements, wherein the first and second subsets are interleaved; and a phase blender, the phase blender having a first input coupled to the first output of the switching network and a second input coupled to the second output of the switching network, wherein the phase blender generates an output signal which is a function of a variable combination of the first and second inputs.