Integration of Tunable Capacitors and Bonded-Wires for Contactless RF Switch and Tunable Filter

論文發表人：陳世叡 (南加州大學電機所博士班)

 

http://www.transducers09.org/

 

本文提出由表面微機電加工可調式電容及黏合線所組成的非接觸式微機電射頻開關。這個微機電射頻開關在2.4GHz的窄頻範圍可以達到10dB的能量隔離及4比1的電容變化。採用黏合線的方法可以大幅的減少可調式電容中移動平板的變形需求。更可以進一步允許氧化鋅壓電薄膜被用於改變電容的空氣間隙。如此形成一個非接觸式微機電射頻開關。

 

This paper describes a contactless RF MEMS switch, composed of two surface-micromachined tunable capacitors and two bonded-wire inductors, which can achieve a power isolation ratio of 10 dB with a capacitance variation of mere 4:1 over a narrow bandwidth near 2.4 GHz.  This novel approach of using inductors eases the deflection requirement for the deformable bridge for the variable capacitor, and allows piezoelectric ZnO film to be used to deflect the capacitor bridge to vary the air gap, thus yielding a contactless RF switch.

 

A 2.89mW 50GOPS 16x16 16-Core MIMO Sphere Decoder in 90nm CMOS

論文發表人:  楊家驤 (加州大學洛杉磯分校電機所博士班)

 

http://www.esscirc2009.org/

 

在這篇論文中，我們以90奈米製程實作了一顆具有16核心適用於多重輸入多重輸出通道的球狀解碼器。這顆球狀解碼器晶片擁有高度彈性，能支援多種格規格：從2x2天線陣列到8x8天線陣列，BPSK到64-QAM的調變方式，並且支援16-128載波。操作在16MHz的工作頻率、16x16天線陣列、64QAM模式時，它能提供高達50GOPS的運算量。操作於321mV電壓時，其功率消耗僅2.89mW，產生高達17.3GOPS/mW的功率效率。而操作在256MHz頻率時，使用16MHz的頻率通道，它的最高資料輸出為1.5Gbps。

 

A 16-core multi-input multi-output (MIMO) decoder for agile communication systems is implemented in a low-VT 90nm CMOS technology. This chip implements the sphere decoding algorithm and is highly flexible to support multiple configurations: antenna arrays from 2×2 to 16×16, modulations from BPSK to 64QAM, and up to 128 data streams. Operating at 16MHz, the chip provides 50GOPS (12-bit add equivalent) in the 16×16, 64QAM mode. It consumes 2.89mW of power with a 321mV supply voltage, resulting in a power efficiency of 17.3GOPS/mW. At 256MHz, the peak data rate exceeds 1.5Gbps over a 16MHz channel.

 

A Software Tool to Process HIV Ultra-deep Sequencing Nucleotide Data

論文發表人: 羅健記 (新墨西哥大學 電腦科學所 碩士班)

 

http://cnls.lanl.gov/q-bio/index.html

 

由454生命科學公司所開發的焦磷酸測序技術是一種超高通量的DNA測序方式，其所產生大量的序列資訊內容可被用於不同的基因組研究。然而如此大量的數據是需要一個適當的處理方式，才能做後續的分析使用。因此，我們開發出一個工具來處理這樣的數據內容，使用者輸入超深度測序序列和參考序列的FASTA檔案，程式將會輸出精簡、壓縮，具有排序統計量和根據密碼子排列好的序列。此工具已成功地應用於最近的一份研究報告並投稿於PLoS One期刊(PLoS ONE 4(5): e5683)，該研究報告揭示HIV – 1病毒的動態基因序列及可能造成藥物治療失敗的可能機轉。

 

Massive sequence reads generated by 454 Life Sciences pyrosequencing technology enable a variety of applications on genome research. A method for processing the huge amount of datasets for subsequent analysis is necessary. We have developed a software tool for this purpose. Given input with ultra-deep sequencing sequences and a reference sequence in FASTA format, the program will output with compressed, identity-tallied and codon-aligned sequence alignment. This tool has been successfully applied on a recent study to reveal dynamic HIV-1 escape and large population shifts during drug treatment.