MULTI-PHASE VOLTAGE-CONTROLLED OSCILLATOR

摘要

Embodiments provide a multi-phase voltage controlled oscillator (VCO) that produces a plurality of out-put signals having a common frequency and different phases. In one embodiment, the VCO may include a passive conductive structure having a first ring and a plurality of taps spaced around the first ring. The VCO may further include a capacitive load coupled to the passive conductive structure, one or more feedback structures coupled between a pair of opposing taps of the plurality of taps, and one or more current injection devices coupled between a pair of adjacent taps of the plurality of taps.

主权项

1. A voltage controlled oscillator (VCO) comprising:
a passive conductive structure having a first ring and a plurality of taps spaced around the first ring; a capacitive load coupled to the passive conductive structure; a plurality of feedback structures, wherein one or more feedback structures of the plurality of feedback structures are coupled between a pair of opposing taps of the plurality of taps, the one or more feedback structures configured to provide positive feedback between the pair of opposing taps with gain so that output signals at the pair of opposing taps oscillate with a predetermined phase-relationship with respect to one another; and a plurality of current injection devices coupled together in a second ring, a first current injection device of the plurality of current injection devices coupled between a pair of adjacent taps of the plurality of taps and configured to provide output signals at the pair of adjacent taps with a common frequency.