A 3-10 GHz full-band single VCO agile switching frequency generator for MB-OFDM UWB

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 po...

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Bibliographic Details
Main Authors: Chao-Shiun Wang, Wei-Chang Li, Chomg-Kuang Wang, Homg-Yuan Shih, Tzu-Yi Yang
Format: Conference Proceeding
Language:English
Subjects:
Amplitude modulation
Circuits
CMOS
Consumer electronics
Filters
Frequency synthesizer
Frequency synthesizers
Mixers
Multiplexing
Switching frequency
Transceivers
UWB
Voltage-controlled oscillators
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Description
Summary: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 of a series of dividers, quadrature counterbalance single sideband mixers and output buffers, achieves an agile switching lime of 7 ns and the unwanted sidebands of less than 35 dBc. The circuit occupies an active area of 1.8x1.6 mm 2 in a 0.13 mum mixed mode CMOS technology. The overall system draws a current consumption of 49 mA from a 1.2 V supply.
DOI:10.1109/ASSCC.2007.4425735