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US 6,650,196 B2Granted
Multi-frequency band controlled oscillator
AssigneeBroadcom Corporation
InventorAndrew D. Nguyen
Life of this patent
Estimating the term…
Abstract
A variable frequency output signal is generated in response to a control signal by providing an oscillator (50) that generates the output signal in different frequency ranges depending on the value of an operating parameter, such as DC bias current. A first circuit (60) adjusts the operating parameter values and a second circuit (80) controls the Kvco of the oscillator.
Claims7
Apparatus arranged to generate a variable frequency output signal in response to a control signal comprising:
- an oscillator arranged to generate the output signal with a frequency adjustable within a first frequency range in response to a first parameter value of an operating parameter and adjustable within a second frequency range in response to a second parameter value of the operating parameter, the frequency being generated within the first frequency range and the second frequency range in response to a control value of the control signal, the control value being within a predetermined control value range;
- a first circuit arranged to adjust the parameter values of the operating parameter;
- and
- a second circuit arranged to control a ratio of the frequency to the control value within at least the first frequency range, said second circuit comprising a transistor defining an output path and a resistor connected in the output path.
1 more element
Apparatus arranged to generate a variable frequency output signal in response to a control signal comprising:
- an oscillator arranged to generate the output signal with a frequency adjustable within a first frequency range in response to a first parameter value of an operating parameter and adjustable within a second frequency range in response to a second parameter value of the operating parameter, the frequency being generated within the first frequency range and the second frequency range in response to a control value of the control signal, the control value being within a predetermined control value range;
- a first circuit arranged to adjust the parameter values of the operating parameter;
- a second circuit arranged to control a ratio of the frequency to the control value within the first frequency range;
- a third circuit arranged to control the ratio within the second frequency range;
- and
- a switch arranged to select between the second circuit and the third circuit.
3 more elements
Dependencies are inferred from the claim text.