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AssigneeTexas Instruments Incorporated
InventorThomas Keller
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The invention relates to a voltage-controlled oscillator circuit including an oscillator circuit connected to a voltage source furnishing a substantially constant supply voltage, and comprising at least one varactor, and a control voltage generator circuit whose output is connected to the anode of the varactor, the frequency of the oscillation signal of the oscillator circuit being variable by changing the control voltage. A voltage converter circuit and an ON/OFF switch therefor is located between the voltage source and the oscillator circuit, the conversion factor of the voltage converter circuit being selected so that a wide tuning range of the varactor and thus a wide frequency range of the oscillation signal is available. The invention can be put to use, for example, in a phase-locked loop. The oscillator circuit may be powered by a fixed predefined battery voltage.
A voltage-controlled oscillator circuit including an oscillator circuit connected to a voltage source fumishing a substantially constant supply voltage, and comprising at least one varactor, and a control voltage generator circuit whose output is connected to the anode of the varactor, the frequency of the oscillation signal of the oscillator circuit being variable by changing the control voltage, wherein a voltage converter circuit and an ON/OFF switch therefor is located between said voltage source and said oscillator circuit, the conversion factor of said voltage converter circuit being selected so that a wide tuning range of said varactor and thus a wide frequency range of said oscillation signal is available,
Dependencies are inferred from the claim text.