A Differential VCO Design for GSM Handset Applications

A Differential VCO Design for GSM Handset Applications PW}Yts7p  
`VHm,g2  
Introduction dsh}-'>  
The differential pair of bipolar transistors is the common rh+OgKi  
building block in modern RF integrated circuits.An i"-j:b:c<  
advantage of this architecture is its high loop gain making Z/64E^  
it popular for differential Voltage Controlled Oscillator l|DOsI'r  
(VCO) designs in RFICs.Designers of discrete (or hybrid) 4m~\S)ad  
VCO circuits usually use the more traditional Colpitts D%Wr/6X  
design avoiding the added complexity of the differential } nQHP4'  
VCO configuration. 'h:4 Fzo<  
Because of its primary usage in proprietary RFICs, only LNj|t)Ov  
limited differential VCO design and modeling information )/BKN`,  
has been made available.In this application note, we will ]xuq2MU,l  
attempt to build a bridge toward better understanding of $T1c{T6n}  
the differential VCO by describing a design covering _onHe"%
{  
910–980 MHz which is appropriate for use in GSM h7g9:10  
handsets.This design will also demonstrate how the Alpha {MIs%w.G  
SMV1493-079 varactor diode, an essential element in this fx*Swv%r  
VCO, .. NoMEe<  
{r Gx*<e  

未注册仅能浏览部分内容，查看全部内容及附件请先 登录 或 注册

ding好贴就顶么

HAO DONG DONG

给楼主顶一个

是不是哦

顶的就是你！

看看材料如何，学些

正接手一个720M的  没做过 先学下

很不错，再次感谢

很不错，再次感谢