Digitally-controlled reference oscillators

Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – Fusible element actuated

Reexamination Certificate

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C331S03600C, C331S1170FE

Reexamination Certificate

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10819597

ABSTRACT:
Varactor and reference oscillator structures are provided that are particularly suited for integrated circuit fabrication and which provide excellent parameter performance (e.g., monotonicity, linearity, low phase noise and low differential and integral non-linearity) so that they are useful in a variety of wireless communication structures (e.g., cellular telephones).

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HongMo Wang A 9.8 GHz back-gate tuned VCO in 0.35 CMOS, IEEE interaction Solid-State Circuits Conference Feb. 15-17, 1999 pp. 406-407.
Sedra et al. “Microelectronic Circuits” fifth edition Oxford University press p. 51.
Maget, Judith, et al., “Comparison of CMOS VCOs for UMTS Tuned by Standard and Novel Varactors in Standard 0.25um Technology”, pp. 1-4.
Kucera, Jacob, “3.6 GHz VCOs for Multi-band GSM Transceivers”, pp. 1-4.
Typpo, J., “A Back Gate Tuned PFET VCO”, Analog Integrated Circuits and Signal Processing, pp. 265-269, Kluwer Academic Publishers, 2002, The Netherlands.

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