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A 600MHz CMOS OFDM LINC Transmitter with a 7 Bit Digital Phase Modulator
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- Authors
- Kwan-Woo Kim, Sang Jin Byun, Kyu Tae Lim, Chang-Ho Lee, Joy Laskar
- Issue Date
- 2008-06
- Citation
- Radio Frequency Integrated Circuits Symposium (RFIC) 2008, pp.677-680
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- This paper presents a new architecture for a LINC transmitter adopting a digital phase modulator (DPM). The DPM uses a 7 bit digital input to directly modulate the RF phase of each path, thus simplifying gain/phase mismatch compensation. Furthermore, this feature needs only one set of test signals for gain and phase mismatch detection. The implemented LINC transmitter IC consumes 140mA from a 1.9V supply including an LC quadrature VCO, two DPMs, and two PA driver amplifiers, and it transmits a 6MHz bandwidth 64-QAM OFDM signal in the UHF TV band with external switching PAs and a power combiner. © 2008 IEEE.
- KSP Keywords
- 64-QAM, MHz bandwidth, Mismatch compensation, Mismatch detection, OFDM signal, Phase mismatch, Power combiner, QAM OFDM, Quadrature VCO, UHF TV Band, phase modulator