CPC H03B 5/124 (2013.01) [H03B 5/1215 (2013.01); H03B 5/1265 (2013.01); H03B 2200/004 (2013.01)] | 20 Claims |
1. A voltage controlled oscillator (VCO) circuit comprising:
a pair of inductors coupled in series;
a first pair of varactors coupled in series, a first common mode node being between the respective varactors of the first pair of varactors;
a second pair of varactors coupled in series, a second common mode node being between the respective varactors of the second pair of varactors,
a first terminal of the first pair of varactors being coupled to a first terminal of the second pair of varactors and a first terminal of the pair of inductors, and
a second terminal of the first pair of varactors being coupled to a second terminal of the second pair of varactors and a second terminal of the pair of inductors; and
a supply voltage node switchably coupled to the first common mode node through a first switch, the supply voltage node being a node located between the pair of inductors.
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