發(fā)布時間：2018-09-07 21:59

【摘要】：設(shè)計了一種無線傳感網(wǎng)射頻接收機中的基帶電路,包括濾波器和可變增益放大器(VGA)。濾波器采用5階切比雪夫型有源RC結(jié)構(gòu),帶寬可調(diào),具有自動調(diào)諧功能,能適應(yīng)制造工藝與環(huán)境條件的變化。VGA由2階放大器與1階緩沖器組成,每階放大器擁有一個DCOC環(huán)路,用來抑制直流失調(diào),減小增益瞬態(tài)變化的穩(wěn)定時間。采用TSMC 130 nm CMOS工藝進行流片。測試結(jié)果表明,供電電壓為1.3 V時,濾波器能夠涵蓋8種帶寬。自動調(diào)諧模塊的調(diào)諧范圍為±20%,調(diào)諧精度為2%。接收機的IIP3為28 d Bm,雙邊帶噪聲為3 d B。VGA的增益變化范圍為-12~56d B。當(dāng)VGA的增益瞬態(tài)變化量為32 d B時,DCOC的穩(wěn)定時間小于100 ns。
[Abstract]:A baseband circuit in radio frequency receiver of wireless sensor network is designed, including filter and variable gain amplifier (VGA). The filter adopts a 5th-order Chebyshev active RC structure with adjustable bandwidth and automatic tuning function. It can adapt to the changes of manufacturing process and environmental conditions. The filter consists of a second order amplifier and a first order buffer. Each order amplifier has a DCOC loop. It is used to restrain DC offset and reduce the time of transient change of gain. The flow sheet was carried out by TSMC 130 nm CMOS process. The test results show that the filter can cover 8 kinds of bandwidth when the supply voltage is 1.3 V. The tuning range of the automatic tuning module is 鹵20 and the tuning accuracy is 2. The gain range of the receiver with a IIP3 of 28 d Bm, and a noise of 3 d B.VGA is -12C 56 dB. When the gain transient variation of VGA is 32 dB, the stabilization time of DCOC is less than 100 ns..
【作者單位】： 中國科學(xué)院上海微系統(tǒng)與信息技術(shù)研究所;
【分類號】：TN402

【相似文獻】

相關(guān)碩士學(xué)位論文 前2條

1 卜亮宇;射頻接收機中連續(xù)時間帶通Δ∑調(diào)制器設(shè)計[D];東南大學(xué);2016年

2 楊思軍;27MHz CMOS射頻接收機前端設(shè)計[D];湖南大學(xué);2009年

，

本文編號：2229532