Active balun device

Amplifiers – With semiconductor amplifying device – Including balanced to unbalanced circuits and vice versa

Reexamination Certificate

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Details

C330S254000, C330S260000

Reexamination Certificate

active

07420423

ABSTRACT:
An active balun device is provided. The active balun device includes: a differential input portion for receiving an external single input signal to output two complementary differential signals; and a differential amplifier connected to the differential input portion in cascade to amplify the two differential signals received from the differential input portion. Thus, the active balun device has a sufficient gain and a desired bandwidth in a semiconductor circuit.

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Holdenried, C., et al. (2003) “Modified CMOS Cherry-Hooper Amplifiers with Source Follower Feedback in 0.35 μm Technology.” IEEE. pp. 553-556.
‘Design of an Original K-Band Active Balun With Improved Broadband Balanced Behavior’ Viallon et al., IEEE Microwave and Wireless Components Letters, vol. 15, No. 4, Apr. 2005, pp. 280-282.
‘A Novel Broadband Active Balun’ Kawashima et al., 33rdEuropean Microwave Conference, Munich 2003, pp. 495-498.
‘Transimpedance amplifier for 10 Gigabit Ethernet Local Area Network Physical Layer’ Le et al., Information and Communications University, Korea.
Korean Notice of Patent Grant date May 4, 2007 for the corresponding application KR 10-2005-0089721.

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