A LOW-POWER ALL-DIGITAL PHASE MODULATOR PAIR FOR LINC TRANSMITTERS

被引:0
|
作者
Tsai, Ping-Yuan [1 ]
Chen, Tsan-Wen [1 ]
Lee, Chen-Yi [1 ]
机构
[1] Natl Chiao Tung Univ, Dept Elect Engn, Hsinchu, Taiwan
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D O I
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中图分类号
TP301 [理论、方法];
学科分类号
081202 ;
摘要
This paper presents a low-power all-digital phase modulator (PM) pair to generate constant-envelope signals for LINC transmitters. To reduce the power overhead, an open-loop delay line based phase shifter with a continuous locking scheme is adopted for the PM design. This design is implemented by 90 nm CMOS technology with active area of 0.1892 mm(2). The PM provides 8-bit resolution with RMS error 0.33 degrees at IF frequency 80 MHz, and the power consumption is only 885 uW with 1.0 V supply voltage. Considering a 64-QAM OFDM system, the EVM of -31.87 dB can be achieved by using the proposed PM pair.
引用
收藏
页码:48 / 51
页数:4
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