A 2GHz Tx LO generation circuit with active PPF and 3/2 divider in 65nm CMOS

A 2GHz Tx LO generation circuit with active PPF and 3/2 divider in 65nm CMOS

This paper demonstrates a 2GHz Tx LO generation circuit with 8% tuning range featuring a VCO, an active polyphase filter (PPF), and a 3/2 divider with 50% output signal duty cycle, implemented in a standard 65nm LP CMOS process. The circuit measures a phase noise of -158dBc/Hz at 20 MHz offset frequ...

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Bibliographische Detailangaben
Hauptverfasser: Tormanen, M., Axholt, A., Lindstrand, J., Sjoland, H.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
CMOS integrated circuits
Frequency conversion
Frequency dividers
Frequency measurement
Noise measurement
Phase noise
Polyphase filters
Radiation detectors
Tuning
Voltage controlled oscillators
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Beschreibung
Zusammenfassung:This paper demonstrates a 2GHz Tx LO generation circuit with 8% tuning range featuring a VCO, an active polyphase filter (PPF), and a 3/2 divider with 50% output signal duty cycle, implemented in a standard 65nm LP CMOS process. The circuit measures a phase noise of -158dBc/Hz at 20 MHz offset frequency, with a power consumption of 29.8mW. It occupies a chip area of 0.53 mm 2 , including pads. The spurious tone at 1GHz, caused by mismatch in the active polyphase filter and frequency divider, is at -50dBc.
ISSN:2325-0631
DOI:10.1109/ISICir.2011.6131914