Othello chip suits 3G TD-SCDMA wireless handsets(英)
来源:百度文库 编辑:神马文学网 时间:2024/05/17 04:48:25
www.52RD.com 2007年7月19日 我爱研发网 eeProductCenter
Analog Devices Inc. has unveiled the latest addition to its family of Othello direct conversion radios and its broad TD-SCDMA product portfolio, the Othello-3T AD6552.
The Othello-3T AD6552 is ADI’s second-generation radio designed specifically for the 3G TD-SCDMA standard and complements all of the company’s TD-SCDMA baseband chipsets, including SoftFone-LCR and SoftFone-LCR+.
Based on the Othello direct-conversion architecture and a low-noise transmitter, AD6552 simplifies the development of the radio section of 3G wireless handsets by eliminating the SAW filters that are usually needed in the transmit path, reducing both cost and board space. In addition, the receiver section provides EVM performance that supports the requirements for HSDPA and includes a fully-automatic DC offset control.
AD6552 integrates almost all of the necessary components for a handset radio design (VCOs, tank circuits, loop filters and power management) on a single chip. Component count for a dual-band radio is reduced by nearly 40 percent compared to the previous two-chip Othello-W single-band radio for TD-SCDMA, according to ADI.
The Othello-3T AD6552 direct-conversion CMOS RF transceiver provides a complete transmit/receive product for TD-SCDMA-based mobile terminals. The receiver section includes high-performance single-ended low-noise amplifiers (LNAs) covering the 1,900- and 2,000MHz bands. A direct-down-converting quadrature mixer driven by an on-chip fractional-N PLL synthesizer deliver baseband I and Q (In-phase and Quadrature) signals to a variable-gain amplifier (VGA) and programmable low-pass filter stages with DC offset correction.
The transmitter section consists of a fractional PLL synthesizer, a high performance VGA and quadrature modulator driving a common wideband output stage, as well as a true-rms RF power detector and on-chip DAC for power amplifier control.
Othello-3T AD6552 is sampling now in a 6mm x 6mm 40-lead lead-frame chip scale package.
Analog Devices Inc. has unveiled the latest addition to its family of Othello direct conversion radios and its broad TD-SCDMA product portfolio, the Othello-3T AD6552.
The Othello-3T AD6552 is ADI’s second-generation radio designed specifically for the 3G TD-SCDMA standard and complements all of the company’s TD-SCDMA baseband chipsets, including SoftFone-LCR and SoftFone-LCR+.
Based on the Othello direct-conversion architecture and a low-noise transmitter, AD6552 simplifies the development of the radio section of 3G wireless handsets by eliminating the SAW filters that are usually needed in the transmit path, reducing both cost and board space. In addition, the receiver section provides EVM performance that supports the requirements for HSDPA and includes a fully-automatic DC offset control.
AD6552 integrates almost all of the necessary components for a handset radio design (VCOs, tank circuits, loop filters and power management) on a single chip. Component count for a dual-band radio is reduced by nearly 40 percent compared to the previous two-chip Othello-W single-band radio for TD-SCDMA, according to ADI.
The Othello-3T AD6552 direct-conversion CMOS RF transceiver provides a complete transmit/receive product for TD-SCDMA-based mobile terminals. The receiver section includes high-performance single-ended low-noise amplifiers (LNAs) covering the 1,900- and 2,000MHz bands. A direct-down-converting quadrature mixer driven by an on-chip fractional-N PLL synthesizer deliver baseband I and Q (In-phase and Quadrature) signals to a variable-gain amplifier (VGA) and programmable low-pass filter stages with DC offset correction.
The transmitter section consists of a fractional PLL synthesizer, a high performance VGA and quadrature modulator driving a common wideband output stage, as well as a true-rms RF power detector and on-chip DAC for power amplifier control.
Othello-3T AD6552 is sampling now in a 6mm x 6mm 40-lead lead-frame chip scale package.
Othello chip suits 3G TD-SCDMA wireless handsets(英)
TD-SCDMA supporters push for low-end handsets
3G的中国结:TD-SCDMA决定中国3G的未来
TD-SCDMA
TD-SCDMA
TD-SCDMA测试方案暗示3G未来的市场布局
全球3G用户过亿 TD-SCDMA商用时不我待
计育青:3G三大标准博弈 TD-SCDMA后来居上
小灵通触动3G运营 TD-SCDMA适合替代PHS
TD-SCDMA 小常识
3G五年争论焦点开始转移 谁该为TD-SCDMA买单
TD-SCDMA成为中国3G手机研发重心之一,第二代商用芯片即将登场
展讯SC8800再添可视电话功能,为TD-SCDMA加大3G竞争砝码
2008年北京奥运前 TD-SCDMA将是唯一3G系统
一个TD测试工程师的独白 - 中国移动3G-TD-SCDMA商用测试讨论区 - 3G网络论...
TD-SCDMA在韩国启航
TD-SCDMA手机设计原理
TD-SCDMA面临最后一公里挑战
TD-SCDMA终端产品发展分析
Report: MediaTek may buy ADI‘s wireless chip biz
信产部:我部发布TD-SCDMA通信行业标准
TD-SCDMA/GSM混合组网分析
TD-SCDMA/GSM混合组网分析
McWill是否要重蹈TD-SCDMA覆辙