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This paper presents a 1.1-V low-voltage frequency synthesizer for U-NII band system. In order to achieve low-voltage and high-speed operations, a new 32/33 dual-modulus prescaler with pass-transistor-logic (PTL) topology and folding-injection architecture is proposed. Fabricated in 0.18-mum CMOS technology, the measured phase noise of the 6.08-GHz frequency synthesizer at a 1 MHz offset is -114 dBc/Hz...
This paper presents an agile switching frequency generator with a single voltage controlled oscillator (VCO) covering all the 14 bands for MB-OFDM UWB system. The proposed architecture with the group selection mixers is designed to simplify the synthesizer implementation for optimizing the system power consumption and harmonic sideband spurious suppression. This frequency generator, which consists...
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