A 3–10mW, 3.1–10.6GHz integer-N QPLL with reference spur reduction technique for UWB-based cognitive radios

Abstract

An integer-N charge pump QPLL provides 3.168 - 10.56GHz lock range, -108.38dBc/Hz phase noise at 1MHz offset, and -59.42dBc reference spur with digital calibration technique for charge pump mismatch while consuming 10.1mW at 10.56GHz with 4-divder at the output. A wideband low power TSPC programmable divider supports 57 sub-bands. It is implemented in a 1V 65nm CMOS process. Active area is 0.12mm2.