Amplifiers – With semiconductor amplifying device – Including balanced to unbalanced circuits and vice versa
Reexamination Certificate
2009-07-31
2010-11-30
Nguyen, Patricia (Department: 2817)
Amplifiers
With semiconductor amplifying device
Including balanced to unbalanced circuits and vice versa
C330S079000, C330S292000
Reexamination Certificate
active
07843272
ABSTRACT:
A low noise amplifier having a wide operating frequency band and a high dynamic range is provided. A transformer having a secondary winding connected between an input terminal to which an input signal is applied and a positive differential output terminal, and a primary winding connected between a negative differential output terminal and an input node is provided as a feedback circuit between a cascode amplifier circuit, which includes transistors and a resistor, and an output circuit, which includes a transistor and a constant current source. Selective use of a transformer whose leakage inductance has an adequate value as the feedback transformer can realize a low noise amplifier which has a wide operating frequency band and a high dynamic range.
REFERENCES:
patent: 7256646 (2007-08-01), Eid et al.
patent: 7414481 (2008-08-01), Li et al.
patent: 7489192 (2009-02-01), Vitzilaios et al.
patent: 7633344 (2009-12-01), Yamaguchi
patent: 7737783 (2010-06-01), Yamaguchi
patent: 7737788 (2010-06-01), Roo et al.
patent: 2007/0096831 (2007-05-01), Gao et al.
patent: 2008/0122538 (2008-05-01), Park et al.
patent: 2003-289226 (2003-10-01), None
Extended Search Report by European Patent Office of EP09166912.7, Jan. 2010.
Chiang, Pei-Yaun; Jou, Christina F.; Wu, Hui-I; Zhe-Yang, Huang; “A 10˜18GHz Wide-band Transformer feedback LNA”, RFIT2007-IEEEE International Workshop on Radio-Frequency Integration Technology Dec. 9-11, 2007.
Cassan, David J. “A 1-V Transformer-Feedback Low-Noise Amplifier for 5-GHz Wireless LAN in 0.18-um CMOS” IEEE Journal of Solid-State Circuits, vol. 38, No. 3, Mar. 2003.
Long, John R. “Monolithic Transformers for Silicon RF IC Design” IEEE Journal of Solid-State Circuits, vol. 35, No. 9, Sep. 2000.
Xu, J.; Woestenburg B.; Geralt Bij De Vatte J.; Serdijn, W.A.; “GaAs 0.5dB NF Dual-loop Negative-Feedback Broadband Low-Noise Amplifier IC”; Electronics Letters Jul. 07, 2005, vol. 41, No. 14.
Liao, Hsien-Yuan, Liang, Keko-Chun; Chiou, Hwann-Kaeo; “A Compact and Low Power Consumption K-band Differential Low Noise Amplifier Design Using Transformer Feedback Technique”, IEEE 2007.
K. Van Hartingsveldt, M.H.L. Kouwenhoven, CJ.M. Verhoeven, “HF Low Noise Amplifiers with Integrated Transformer Feedback”, ISCAS 2002, vol. 2, pp. II-815 to II-818, May 2002.
Baker & McKenzie LLP
Icom Incorporated
Nguyen Patricia
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