A Compact Mobile FM Transmitter with Automatic Embedded Antenna Tuning and Low Spurious Emission in 65nm CMOS

被引:0
|
作者
Jiang, Xudong [1 ]
Hu, Deyong [1 ]
Tan, Ying Chow [1 ]
Leow, Chin Heng [1 ]
Chen, J. R. [2 ]
Shu, Weimin [1 ]
Wong, Sheng Jau [1 ]
Shanaa, Osama [1 ]
机构
[1] MediaTek Singapore Pte Ltd, Singapore, Singapore
[2] MediaTek Ltd Inc, Hsinchu, Taiwan
关键词
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
A 76-108MHz FM Transmitter emits 120dB mu Vrms output signal using an embedded antenna on a PCB. A proposed on-chip calibration scheme digitally tunes an on-chip capacitor array to centre the embedded antenna resonance circuit with an external inductor at the desired FM channel. The transmitter achieves a 60dB audio SINAD, better than -45dB LO leakage and -50dB sideband suppression with -30/-55dB ACLR for 200kHz/400kHz offsets, respectively. The out of band spurious emission level for coexistence with other radio bands is very low and mostly around -102 dBm or less. A new on-chip T/R switch capable of handling 4Vpp signal is used to allow both FM TX and RX to share the same embedded antenna. The transmitter adds only 0.2mm boolean AND 2 die area overhead to an FM TRX SoC in 65nm CMOS and draws 10mA from a 4.2V battery.
引用
收藏
页码:201 / 204
页数:4
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