A multi-band frequency synthesizer for GSM/DCS/WIMAX/WLAN applications with ripple-free circuit

A multi-band frequency synthesizer for GSM/DCS/WIMAX/WLAN applications with ripple-free circuit

This paper presents a fully integrated multi-band frequency synthesizer implemented in CMOS 0.18um process with ripple-free circuit in a single loop. The synthesizer is designed for GSM/DCS/WIMAX/WLAN (802.11a/b/g) systems applying to IQ phase based transceivers. The proposed synthesizer with ripple...

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Bibliographische Detailangaben
Hauptverfasser: Po-Heng Chen, Che-Sheng Chen, Mei-Fen Chou, Kuei-Ann Wen
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Frequency synthesizers
GSM
Synthesizers
Voltage control
Voltage-controlled oscillators
WiMAX
Wireless LAN
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Beschreibung
Zusammenfassung:This paper presents a fully integrated multi-band frequency synthesizer implemented in CMOS 0.18um process with ripple-free circuit in a single loop. The synthesizer is designed for GSM/DCS/WIMAX/WLAN (802.11a/b/g) systems applying to IQ phase based transceivers. The proposed synthesizer with ripple-free circuit can reduce the amplitude of control voltage ripple. The synthesizer performs the suppression of 31.4dB in the spectrum of reference-spur and the peak-to-peak jitter with 74% improvement compared to the conventional single loop synthesizer design.