{'fraction_non_alphanumeric': 0.04327666151468315, 'fraction_numerical': 0.02627511591962906, 'mean_word_length': 4.890909090909091, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
High-precision frequency synthesizers for UWB applications

Two closed-loop frequency synthesizers are proposed for multi-band OFDM alliance (MBOA) ultrawideband (UWB) application. Employing the technique of Miller divider, the first frequency synthesizer produces negligible in-band spurs while achieving less than 9.5-ns settling time. With delay-locked loop (DEL) operation, the second frequency synthesizer achieves a sideband magnitude of -35.3 dB and -82 dBc/Hz phase noise at the frequency offset of 400 Hz. Both UWB frequency synthesizers have been fabricated in 0.18-/spl mu/m CMOS process and consumes only 22 mW and 54 mW, respectively.