Oscillators – Polyphase output
Reexamination Certificate
2005-09-29
2008-08-19
Kinkead, Arnold (Department: 2817)
Oscillators
Polyphase output
C331S074000, C331S057000
Reexamination Certificate
active
07414484
ABSTRACT:
Voltage controlled oscillator (“VCO”) circuitry includes LC tank or ring VCO circuitry and frequency divider circuitry that divides the frequency output by the oscillator circuitry by a selectable integer factor that is at least 2 in the case of a ring oscillator or at least 4 in the case of an LC tank oscillator. This arrangement allows the oscillator circuitry to operate at frequencies that are higher than the desired final output frequencies, which has such advantages as reducing the size and power consumption of the oscillator circuitry, and allowing the circuitry as a whole to have a wide range of operating frequencies while reducing the frequency range over which the oscillator circuitry may be required to operate.
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Bereza William
Kwasniewski Tad
Usama Muhammad
Wang Shoujun
Altera Corporation
Bertenthal Matthew S.
Kinkead Arnold
Ropes & Gray LLP
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