標題: | A compact CMOS 2V low-power direct-conversion quadrature modulator merged with quadrature voltage-controlled oscillator and RF amplifier for 1.9GHz RF transmitter applications |
作者: | Kao, HS Wu, CY 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
公開日期: | 2000 |
摘要: | A compact 2V CMOS low-power direct-conversion quadrature modulator merged with quadrature voltage-controlled oscillator (VCO) and RF amplifier for 1.9GHz RF transmitter applications is described. The circuit is implemented by using 0.35 mu m DPTM CMOS technology and dissipates only 19mW under 2V power supply voltage. The low power operation is enabled by the current reuse technique used among quadrature modulator, quadrature VCO, and RF amplifier. Due to small signal path mismatch, the unwanted lower sideband is below -50dB when the 0dB normalized desired upper sideband is set at 1.97GHz. Moreover, the LO feedthrough, second-order intermodulation, and third-order intermodulation are less than -50dB. The tuning range of the quadrature VCO is 270MHz from 1.95GHz to 2.22GHz. |
URI: | http://hdl.handle.net/11536/19302 |
期刊: | ISCAS 2000: IEEE INTERNATIONAL SYMPOSIUM ON CIRCUITS AND SYSTEMS - PROCEEDINGS, VOL IV: EMERGING TECHNOLOGIES FOR THE 21ST CENTURY |
起始頁: | 765 |
結束頁: | 768 |
顯示於類別: | 會議論文 |