標題: Seven GHz high gain 0.18 mu m CMOS gilbert downconverter with wide-swing cascode current mirrors
作者: Tseng, Sheng-Che
Meng, Chinchun
Huang, Guo-Wei
電信工程研究所
Institute of Communications Engineering
關鍵字: cascode current mirror;downconverter;Gilbert mixer;micromixer;RFIC
公開日期: 1-Feb-2008
摘要: A downconversion micromixer with low-voltage cascode current mirrors at both transconductor and load stages has been implemented using the 0.18-mu m CMOS technology in this article. This micromixer has a single-to-differential RF input transconductor formed by the NMOS wide-swing cascade current mirror, while the PMOS wide-swing cascode current mirror is also employed to improve conversion gain. A super source follower is used at the output to reduce the output impedance and to transfer more power to the load. This fully integrated downconverter has the high conversion gain of 16 dB and high LO-to-IF isolation of 50 dB at 7 GHz. The current consumption of the mixer core is 1 mA at 1.8 V supply voltage. Thanks to the low-voltage operation property of the wide-swing cascode current mirror, six transistors can be stacked within 1.8 V supply voltage. (c) 2007 Wiley Periodicals, Inc.
URI: http://dx.doi.org/10.1002/mop.23095
http://hdl.handle.net/11536/9697
ISSN: 0895-2477
DOI: 10.1002/mop.23095
期刊: MICROWAVE AND OPTICAL TECHNOLOGY LETTERS
Volume: 50
Issue: 2
起始頁: 435
結束頁: 437
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