Oscillator circuit

Details Oscillator circuit Oscillator circuit

2003-08-22

2008-10-07

Kinkead, Arnold (Department: 2817)

Oscillators

Combined with particular output coupling network

C331S045000, C331S00100A, C331S034000, C331S17700V, C327S156000, C455S260000

Reexamination Certificate

active

07432769

ABSTRACT:
The oscillating unit11generates a signal having a frequency of n*f, i.e., n times a target frequency f. The control voltage generation circuit21compares the phase difference between a divided signal of a signal generated in the oscillating unit11and the reference signal, and outputs a DC control voltage according to the phase difference to the oscillating unit11, thereby controlling an oscillation frequency. The divider circuit22converts a signal generated in the oscillating unit11to the target frequency f, by dividing the aforementioned signal into n equal units. By setting the oscillation frequency of the oscillating unit at n times the target frequency, the inductance and the capacitors can be formed on a semiconductor integrated circuit board.

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Weldon et al., “A 1.75 GHz Highly Integrated Narrowband CMOS Transmitter with Harmonic Rejection Mixers,” IEEE, JI of Solid State Circuits, vol. 36, No. 12, pp. 2003-2015, 2001.
Office Action issued in Japanese counterpart application,dated Jun. 6, 2006 (with partial translation).
Taiwan Office Action dated Dec. 26, 2006 for Taiwan Patent Application No. 092123512 with English translation.
Chinese Office Action dated Apr. 6, 2007, received in corresponding Chinese Patent Application No. 03820151.8 with English translation.
Taiwanese Office Action dated Mar. 21, 2008, recieved in corresponding Taiwanese Patent Application No. 092123512 with English translation.

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