Comments on "Design issues in CMOS differential LC oscillators" [and reply]

For the original paper see ibid., vol. 34, no. 5, p. 717-24 (1999). The commenter points out that the phase noise difference reported in the aforementioned paper appears to have a topological cause, and he presents a simple analysis to show that the difference is 6 dB under otherwise identical conditions. In reply, the authors clarify some points in their original work.