Tuning range when varactor is placed parallel to a capacitor
时间：04-11
整理：3721RD
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after putting a varactor to an LC resonator the output was not what i expected although the ADS simulations was fine before putting it, the resonator center frequency is 950MHz . i have calculated its frequency range after putting the varactor:
Min.Freq.=934MHz -- Max.Freq.=972.95MHz -- Tuning Range= 4.325250MHz/V
in the calculations the varactor was in parallel with C4 and they are in series with C1,C2,C5,C6, i am using MA46506 varactor where Rs is not mentioned in the datasheet, i took it 0.75 in the model.
Min.Freq.=934MHz -- Max.Freq.=972.95MHz -- Tuning Range= 4.325250MHz/V
in the calculations the varactor was in parallel with C4 and they are in series with C1,C2,C5,C6, i am using MA46506 varactor where Rs is not mentioned in the datasheet, i took it 0.75 in the model.
Hello Redhat,
What is your question?
XTASA
Hello xtasa,
sorry, is it right to take the varactor in parallel with C4 and they are in series with C1,C2,C5,C6 to calculate the total capacitance?
i think placing the varactor in parallel to another capacitor reduces its tuning range...