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  1. #1
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    Cross coupled LC oscillator design current saturates but voltage doesnt

    Dear all,
    I am new to oscillators and trying to understand it by studying from the Razavi text book. While studying cross coupled LC oscillators, i came across this current waveform which saturates i.e. one of the branches in the cross coupled oscillator at a time but voltage doesn't saturate. It looks like a nice sine waveform. Any intuitive explanation for this would help.
    TIA

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  2. #2
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    Re: Cross coupled LC oscillator design current saturates but voltage doesnt

    It's normal as it should be.. While the Current swings between peak-to-peak +- Ibias, The voltage waveform will be sinusoidal due to natural ringing of the tank circuit.
    Imagine, circuit "feeds" the Tank Circuit in every cycle and assemble with natural response of a tank circuit excited by pulse.


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