Oscillator circuit with tuneable signal delay means
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsHarald Jacobsson, Spartak Gevorgian, Thomas Lewin
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Abstract
The invention discloses an oscillator circuit (100, 200, 300, 400), comprising an oscillating element (110, 210, 310, 410) and output means (115, 215, 315, 415) for outputting an oscillation frequency from the oscillating circuit. The circuit further comprises a signal delay means (120, 220, 320, 420) which is arranged in series with the oscillating element and feeds the output signal back to the oscillating element. The delay means is (120, 220, 320, 420) tuneable with respect to the delay it provides. The oscillating element can be an amplifier or a VCO, and the delay means can be a Delay Locked Loop or a tuneable delay line, depending on the embodiment of the invention.
Claims11
An oscillator circuit, comprising an oscillating element and output means for outputting an oscillation frequency from said oscillating circuit, the circuit further comprising a signal delay means which is arranged in series with the oscillating element and feeds the output signal back to the oscillating element, the delay means being tuneable with respect to the delay it provides, characterized in that the signal delay means is a tuneable delay line comprising a control input, to which is connected the output signal from an amplitude detector, with the amplitude detector sampling the signal at a chosen point in the circuit and controlling the delay means so that a maximum output signal is obtained from the oscillator circuit.
Dependencies are inferred from the claim text.