Frequency-Tunable Oscillator Arrangement
AssigneeKoninkijke Philips Electronics N.V.
InventorArnaud Herbert
Life of this patent
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Abstract
A frequency-tunable arrangement comprises a resonance circuit (RS) having a capacitive part (C1, C2, Cv1, Cv2) that is tunable throughout a capacitance range. A plurality of amplifiers (AB, AS1, AS2, AS3) is coupled to the resonance circuit so as to form an oscillation loop. At least one of the amplifiers is a switchable amplifier (AS1) that is switchable between an active state and an idle state. The switchable amplifier causes a capacitance variation in parallel to the capacitive part of the resonance circuit when switched between the active and the idle state. The switchable amplifier is arranged so that the capacitance variation substantially corresponds to the capacitance range throughout which the capacitive part can be tuned.
Claims12
A frequency-tunable arrangement comprising:
- a resonance circuit having a capacitive part that is tunable throughout a capacitance range and
- a plurality of amplifiers coupled to the resonance circuit so as to form an oscillation loop, at least one of the amplifiers being a switchable amplifier that is switchable between an active state and an idle state so as to cause a capacitance variation in parallel to the capacitive part of the resonance circuit, the capacitance variation substantially corresponding to the capacitance range throughout which the capacitive part can be tuned.
A method of tuning a frequency-tunable arrangement that comprises:
- a resonance circuit having a capacitive part that is tunable throughout a capacitance range and
- a plurality of amplifiers coupled to the resonance circuit so as to form an oscillation loop,
- the method comprising:
- a switching step in which at least one of the amplifiers is switched between an active state and an idle state so as to cause a capacitance variation in parallel to the capacitive part of the resonance circuit, the capacitance variation substantially corresponding to the capacitance range throughout which the capacitive part can be tuned.
A computer program product for a frequency-tunable arrangement that comprises:
- a resonance circuit having a capacitive part that is tunable throughout a capacitance range and
- a plurality of amplifiers coupled to the resonance circuit so as to form an oscillation loop,
- the computer program product comprising a set of instructions that, when loaded into the frequency-tunable arrangement, enables the frequency-tunable arrangement to carry out a switching step in which at least one of the amplifiers is switched between an active state and an idle state so as to cause a capacitance variation in parallel to the capacitive part of the resonance circuit, the capacitance variation substantially corresponding to the capacitance range throughout which the capacitive part can be tuned.
Dependencies are inferred from the claim text.