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US 8,547,181 B2Granted
Oscillator with ohmically adjustable oscillation frequency
AssigneeFraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
InventorsRainer Weber, Ingmar Kallfass
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Abstract
An oscillator with adjustable oscillation frequency includes an active device showing a negative input resistance at a terminal, an oscillator circuit coupled to the terminal of the active device showing the negative input resistance, and an element with adjustable ohmic resistance by which the oscillation frequency of the oscillator is adjustable.
Claims5
Oscillator with an oscillation frequency adjustable in a voltage-controlled manner, comprising:
- an active device showing a negative input resistance at a terminal;
- an oscillator circuit coupled to the terminal of the active device showing the negative input resistance;
- and
- an element with an ohmic resistance adjustable in a voltage-controlled manner,
- a controller controlling the ohmic resistance of the element to intermediate values between an on state and an off state of the element so that the oscillation frequency of the oscillator can be continuously adjusted,
- wherein the oscillator circuit comprises a resonator line, wherein the length of the resonator line effective for oscillation generation is adjustable by the element with adjustable ohmic resistance.
3 more elements
Dependencies are inferred from the claim text.