雙回授之低雜訊放大器Dual feedback low noise amplifier

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

14/275,077

專利證號

US 9,369,091 B2

專利獲證名稱

雙回授之低雜訊放大器Dual feedback low noise amplifier

專利所屬機關 (申請機關)

國立中山大學

獲證日期

2016/06/14

技術說明

本發明提出一種具雙迴授之寬頻共閘極低雜訊放大器之電路，該電路係由一差動輸入式電容性共閘極放大器、變壓器、電感以及差動輸出式源極隨耦放大器所組成。本發明之電路特色在於使用雙迴授技術於習知共閘極低雜放大器中，可同時達到雜訊與輸入阻抗匹配，進而大幅地改善習知共閘極低雜訊放大器之雜訊指數。除此之外，本發明結合雙迴授技術與並聯/串聯之峰化網路，更可大幅地沿伸習知共閘極低雜訊放大器之輸入匹配頻寬與3-dB增益頻寬。因此，本發明可有效地改善習知共閘極低雜訊放大器之雜訊指數、匹配頻寬與3-dB增益頻寬。 This invention relates to a circuit of the wideband common-gate (CG) low-noise amplifier (LNA) having dual feedback. The proposed circuit comprises a differential capacitive cross-coupled common-gate (CCC-CG) topology, on-chip integrated transformer, on-chip integrated inductor, and differential source-follower amplifier. The novelties in this invention are described as follow. Using positive-negative dual feedback in a traditional CG LNA simultaneously achieves noise matching and input matching, thereby significantly improving noise figure (NF). Additionally, a merged positive-negative dual feedback and shunt-series inductive peaking significantly extends input matching bandwidth and 3-dB gain bandwidth of traditional CG LNAs. As mentioned above, this invention effectively improves the NF, input matching bandwidth, and 3-dB gain bandwidth of traditional CG LNAs.

備註

本部(收文號：第1080067117號)同意該校108年10月8日中產營字第1081401079號函通報專利終止維護案。

連絡單位 (專責單位/部門名稱)

產學營運及推廣教育處

連絡電話

(07)525-2000#2651

網址