Oscillators – With frequency adjusting means – Step-frequency change
Reexamination Certificate
2006-04-10
2009-08-11
Pascal, Robert (Department: 2817)
Oscillators
With frequency adjusting means
Step-frequency change
C331S03600C, C331S17700V, C331S167000, C331S182000
Reexamination Certificate
active
07573347
ABSTRACT:
A digitally controlled oscillator device includes a programming input, a selection input and an oscillator core with a first capacitive element which is frequency determining and programmable. The first capacitive element is coupled to the programming input that receives a first data word by which an oscillating frequency of the oscillator device is programmed with a predetermined frequency step size. The oscillator device further includes a selection unit for selecting a mode which is coupled to the selection input that receives a mode selection signal. The mode is selectable from a plurality of modes depending on the mode selection signal and each mode from the plurality of modes is characterized by a predetermined frequency step size. The digitally controlled oscillator device also includes a deattenuation amplifier.
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“All-Digital TX Frequency Synthesizer and Discrete-Time Receiver for Bluetooth Radio in 130-nm CMOS”, Robert Bodgan Staszewski, Khurram Muhammad, Dirk Leipold, Chih-Ming Hung, Yo-Chuol Ho, John L. Wallberg, Chan Fernando, Ken Maggio, Roman Staszewski, Tom Jung, Jinseok Koh, Soji John, Irene Yuanying Deng, Vivek Sarda, Oscar Moreira-Tamayo, Alerian Mayega, Ran Katz, Ofer Friedman, Oren Eytan Eliezer, Elida De-Obaldia and Poras T. Balsara, IEEE Journal of Solid-State Circuits, vol. 39, No. 12, Dec. 2004, pp. 2278-2291.
Chen Yangjian
Maurer Linus
Mayer Thomas
Neubauer Volker
Pittorino Tindaro
Eschweiler & Associates LLC
Infineon - Technologies AG
Johnson Ryan J.
Pascal Robert
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