Pole-zero analysis of multi-stage amplifiers and low dropout (LDO) regulators - Details

author：

Xu, Y.S. (Xu, Y.S..) ^[1] | Hu, W. (Hu, W..) ^[2] | Huang, F.Y. (Huang, F.Y..) ^[3] | Huang, J.W. (Huang, J.W..) ^[4] | She, H.B. (She, H.B..) ^[5]

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Abstract：

The　objective　of　this　paper　is　to　provide　tutorial　treatment　of　the　steps　for　analyzing　poles　and　zeros　in　multi-stage　amplifiers　and　low　dropout　(LDO)　regulators.　The　steps　can　be　easily　all　done　by　hand　simplification　without　lacking　for　accuracy,　and　divided　into　two　methods　depending　on　whether　Miller　effect　exists　or　not.　A　two-stage　Simple　Miller　Compensation　(SMC)　amplifier　and　an　output　capacitor-less　regulator　are　analyzed　in　detail,　and　several　multi-stage　amplifiers　reported　in　the　literature　are　also　included.　To　this　end,　Cadence　Spectre　simulations　are　performed　to　compare　hand-computed　pole/zero　locations　with　AC　analysis.　©　(2013)　Trans　Tech　Publications,　Switzerland.

Keyword：

Multi-stage amplifiers; Output capacitor-less ldo; Pole-zero analysis; Transfer function

Community：

[ 1 ] [Xu, Y.S.]Department of Physics and Information Engineering, Fuzhou University, Fuzhou, China
[ 2 ] [Xu, Y.S.]Fujian Integrated Circuit Design Center, Fuzhou 350003, China
[ 3 ] [Hu, W.]Department of Physics and Information Engineering, Fuzhou University, Fuzhou, China
[ 4 ] [Hu, W.]Fujian Integrated Circuit Design Center, Fuzhou 350003, China
[ 5 ] [Huang, F.Y.]Department of Physics and Information Engineering, Fuzhou University, Fuzhou, China
[ 6 ] [Huang, F.Y.]Fujian Integrated Circuit Design Center, Fuzhou 350003, China
[ 7 ] [Huang, J.W.]Department of Physics and Information Engineering, Fuzhou University, Fuzhou, China
[ 8 ] [Huang, J.W.]Fujian Integrated Circuit Design Center, Fuzhou 350003, China
[ 9 ] [She, H.B.]Department of Physics and Information Engineering, Fuzhou University, Fuzhou, China
[ 10 ] [She, H.B.]Fujian Integrated Circuit Design Center, Fuzhou 350003, China

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Source ：

Advanced Materials Research

ISSN： 1022-6680

Year： 2013

Volume： 816-817

Page： 1085-1089

Language： English

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