Patent ID: 7616070
Filing Date: 2009-11-10
Classification: H03B,H03K

Abstract:
1. A multiphase electronic oscillator comprising: a loop of a first plurality of delay stages, the first plurality of delay stages being serially coupled to one another by a first plurality of nodes, the loop being folded to provide two concentric rings of delay stages; a plurality of negative-resistance elements, each element having a first output coupled to a node on the first concentric ring and a second output coupled to a node on the second concentric ring, each output of each negative-resistance element being capable of presenting a negative resistance to a signal coupled to the output; a control chain of a second plurality of delay stages, the second plurality of delay stages being serially-coupled to one another by a second plurality of nodes; and a plurality of control circuits, each control circuit having an input coupled to a node of the control chain, each control circuit being coupled to at least a node of the loop or a negative-resistance element and causing the resistance seen at a node of the loop to be modified in relation to a signal at its input.