AXIOM公司的PA有人用吗？

听用过的人说效率差些，功率一致性也不是很好，但人家便宜啊，比价格GaAs比不过Cmos的

好的，谢谢。看来如果想使用的话要多考虑下了。要过CTA类型的看来不能用了。

要过CTA应该还是可以的，让原厂的技术支持来帮忙去泰尔一起调一下应该还是可以过的，只是比普通的吃力一些而已

用过的xd来说说啊

AXIOM502（就是以前的PMB6293）的效率低一些，和CMOS的工艺和技术有关系。不过后续的AX509PAE提高到接近50%。 感觉CMOS的PA很有前途，以后会成为主流，从集成的角度考虑，是最容易和Transceiver集成到一起的，因为Transceiver也是CMOS工艺的。该PA的手机通过CTA是没有问题，不过在matching上要多下功夫，对着loadpull多优化,另外的谐波和功耗也要重点考虑

还好啊，就是外围原器件多写些,布局注意些就可以了,还有就是要外加个开关,价格是蛮便宜的

那里要加开关?
我看的资料没有啊

如果有人要过CTA的最好慎用！三码机可以用！耗电流很厉害！

如果有人要过CTA的最好慎用！三码机可以用！耗电流很厉害！

过cta应该相对比较困难些
调匹配也是很复杂
每个项目都要重新调试，即使走线很相近的项目
如果公司对pe要求很高，比如dcs必须3以下，那么可能调试很觉得很烦
如果只是要求过基本指标还是比较好做得

还有pe实在调不下来，那么可以尝试该下接受线路上的匹配，把接收稍微调差些
可能会有很大的改善
或者天线开关以及saw都用比较好的牌子 murata epcos会好些

高人啊！ 学习了！

Phase error差，匹配很难调。
PVT useful段差，ＰＶＴ上升沿拐角处拉不上。
PCS几乎不能用
需要FULL　ＰＣＬ校准
烫手

只聽過AX508沒聽過AX509, 是寫錯了嗎 ?  有data sheet嗎 ?
Axiom Microdevices Expands Family of GSM/GPRS Power Amplifiers

AX508 offers improved performance and a smaller footprint, to further confirm Axiom’s position as the leader in CMOS PA for cellular phones.
IRVINE, Calif., Dec. 1, 2008 — Axiom Microdevices, Inc. today announced the introduction of the AX508 power amplifier, as the company continues to expand its product offerings to bring the full benefit of CMOS to its customers..
The AX508 integrates full quad-band GSM/GPRS functionality on a single integrated circuit (IC) using mainstream Silicon CMOS process technology. Key benefits of the AX508 include improved performance, relative to its AX502 product, equating to a longer talk time. With the AX508, Axiom Microdevices also offers a smaller footprint by housing the PA in an ultra-low profile micro lead frame package measuring 5x3.5x0.9 millimeters (mm).
“AX508 demonstrates Axiom’s commitment to continuous innovation and performance improvement.  Axiom leads the field in CMOS PA technology and we continue to innovate and bring further improvements in performance for the benefit of our customers.  All our work reaffirms to us that this is the optimum technology for the front end bringing the obvious advantages of mainstream CMOS and removing the need for specialty process technologies in the last ‘non-CMOS’ circuit block of the phone.” said Brett Butler, Chief Executive Officer, Axiom Microdevices. “We are pleased to build upon the success of our AX502, and offer handset manufacturers the AX508 which increases handset talk-time in a much smaller package footprint.”
Axiom Microdevices’ CMOS power amplifiers were developed using the company’s patented Distributed Active Transformer (DAT) technology, which has made it possible to use 0.13-micrometer silicon CMOS process technology to integrate all of the functions between transmitter output and transmit/receive switch. Leveraging DAT technology, Axiom Microdevices realizes power gain stages, small signal control circuitry and 50Ω input and output matching circuitry on a single die, enables direct connection to the transceiver output and the transmit/receive switch input without the use of the external matching components, helping designers to achieve what was previously only viable with devices manufactured in proprietary gallium arsenide (GaAs) process technology and assembled in complex multi-chip module packaging.
The AX508 amplifies low-level radio frequency (RF) signals to the required high-power levels needed for transmission in GSM/GPRS mobile phone handsets or data modules. The device supports quad-band (GSM 850/900/1800/1900) operation. The power level is regulated via a fully integrated closed-loop power controller which ensures that the GSM power/time mask and switching spectrum may be met with adequate margin to allow robust mass production when subjected to a real world cell phone environment, such as highly elevated VSWR and low supply voltage.
Also included in the AX508 feature set:
•    GSM/GPRS Class 12 operation
•    Power supply range of 2.9-5.5V
•    RF input range: -2 to 8dBm
•    Fully integrated on chip 50Ω matching circuits
•    Fully integrated closed-loop power control
•    Improved Power Added Efficiency
•    Extended Range for Low Power Mode Operation
•    Low Profile 5x3.5x0.9mm Micro Lead Frame package
Axiom Microdevices has proven the reliability of its quad-band GPRS PA through thousands of hours of life testing and high-volume shipments to top Asian handset manufacturers, including China’s Ginwave Technologies, which have to date, reported zero field failures.
“We have chosen to operate in high volume, mature, cost sensitive applications where technical innovations can provide us with a unique advantage,” continued Butler. “Because handset manufacturers, particularly those in China, must pay very close attention to the cost build-up when developing ultra low cost handsets, our AX502 and AX508 PAs are ideally suited for these applications.”

那几个NC 的pin脚可以接地吗?

layout挺麻烦，不建议做4层板。
听说如此，请指正！

502好像不是很好，但据说508效率能到50％，价格便宜，性能也不错。

508应该还没有到量产阶段。
肯定会更便宜

最好不要和6139一起用，绝对麻烦

这PA调起来太麻烦了。而且谐波抑制差。

用AX508的飘过

我这里一板搞定，就是没测谐波和杂散。其它指标都还不错。

AXIOM502的耗流是个硬伤.
08的耗流还可接受.

502峰值电流要大一些，这个是PA的效率决定的。瑞撒的效率是50%，502的是47%。差别就在这里。
需要资料或者交流可以找我。
riseyear 汤辉 13924668431