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A 2.4-GHz Low-Power Direct-Conversion Transmitter Based on Current-Mode Operation  

Choi, Joon-Woo (Pusan National University)
Lee, Hyung-Su (LG Electronics)
Choi, Chi-Hoon (Pusan National University)
Park, Sung-Kyung (Pusan National University)
Nam, Il-Ku (Pusan National University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.48, no.12, 2011 , pp. 91-96 More about this Journal
Abstract
In this paper, a low-power direct-conversion transmitter based on current-mode operation, which satisfies the IEEE 802.15.4 standard, is proposed and implemented in a $0.13{\mu}m$ CMOS technology. The proposed transmitter consists of DACs, LPFs, variable gain I/Q up-conversion mixer, a divide-by-two circuit with LO buffer, and a drive amplifier. By combining DAC, LPF, and variable gain I/Q up-conversion mixer with a simple current mirror configuration, the transmitter's power consumption is reduced and its linearity is improved. The drive amplifier is a cascode amplifier with gain controls and the 2.4GHz I/Q differential LO signals are generated by a divide-by-two current-mode-logic (CML) circuit with an external 4.8GHz input signal. The implemented transmitter has 30dB of gain control range, 0dBm of maximum transmit output power, 33dBc of local oscillator leakage, and 40dBc of the transmit third harmonic component. The transmitter dissipates 10.2mW from a 1.2V supply and the die area of the transmitter is $1.76mm{\times}1.26mm$.
Keywords
Low-power; direct-conversion; transmitter; current-mode;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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