Hello,
Assuming a very low tuning voltage impedance like 10 Ohm, what would be the -3dB modulation BW?
Thanks,
Nicolas

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HMC431
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The HMC431LP4(E) is a GaAs InGaP Heterojunction Bipolar Transistor (HBT) MMIC VCO with an integrated resonator, negative resistance device, varactor diode...
Datasheet
HMC431 on Analog.com
Hello,
Assuming a very low tuning voltage impedance like 10 Ohm, what would be the -3dB modulation BW?
Thanks,
Nicolas

Hello Guarana,
You may use this equation below for computing the modulation bandwidth.

Using the input interface schematic as shown on page 4 of the HMC431 datasheet:

Ctotal = 5.2pF +18pF = 4.034pF
Rs = 150
Zin = 10
So the modulation bandwidth is: 33.1 MHz.
Kind Regards,
Michelle