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What's the reasonable output power level for a CMOS VCO?

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sapphire

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The CMOS VCO has a 1.8V power supply. And it's working in a current-limited regime. The DC current is set to 8mA for the oscillator. We got 5GHz oscillating frequency and -126dBc/Hz phase noise at 1MHz offset.

Then the single-ended output power level is 3.5dBm. Is that reasonable?

Thanks in advance.
 

xtasa

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Hello Sapphire,

Your result for VCO output power is very good if you obtain 3.5dBm or 2.2mW from about 14mW input or 15% effiency.

GL XTASA
 

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