Oscillators – Relaxation oscillators
Reexamination Certificate
2008-03-25
2008-03-25
Pascal, Robert J. (Department: 2817)
Oscillators
Relaxation oscillators
C331S111000, C331S11300A, C331S144000, C331S17700V
Reexamination Certificate
active
11332610
ABSTRACT:
There are provided relaxation oscillators and methods for controlling the same. A relaxation oscillator includes a load device, a switching device, a fine-tuning varactor, and a current source. The load device is configured to provide a variable oscillator output based on a variable input reference voltage. The switching device is connected in signal communication with the load device and is configured to become active and inactive based on the variable oscillator output. The fine-tuning varactor is connected in signal communication with the switching device and is configured to provide fine-tuning of the variable oscillator output when the switching device is active. The current source is connected in signal communication with the switching device and is configured to provide coarse-tuning of the variable oscillator output when the switching device is active.
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Friedman Daniel J.
Rhee Woogeun
Soltanian Babak
Dougherty, Esq. Anne V.
International Business Machines - Corporation
Johnson Ryan J
Keusey, Tutunjian & & Bitetto, P.C.
Pascal Robert J.
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