A 2 V 145 mW 150 MHz CMOS digital phase modulator is fabricated using a 0.6 μm CMOS technology. The modulator is used to control a PLL to form a frequency synthesizer. Fine frequency resolution is achieved by phase interpolation and ΔΣ oversampling. High-speed frequency switching is achieved by loop bandwidth adaptation. Settling time of a PLL with 109 kHz natural frequency can be reduced from 830 μsec to 94 μsec.
|Number of pages||2|
|State||Published - 1 Dec 1999|
|Event||Proceedings of the 1999 Symposium on VLSI Circuits - Kyoto, Jpn|
Duration: 17 Jun 1999 → 19 Jun 1999
|Conference||Proceedings of the 1999 Symposium on VLSI Circuits|
|Period||17/06/99 → 19/06/99|