| US 7,489,194 B2 | ||
| Common gate with resistive feed-through low noise amplifier | ||
| Seyed-Ali Hajimiri, Pasadena, Calif. (US); and Xiang Guan, Pasadena, Calif. (US) | ||
| Assigned to California Institute of Technology, Pasadena, Calif. (US) | ||
| Filed on Dec. 05, 2006, as Appl. No. 11/633,720. | ||
| Application 11/633720 is a continuation of application No. 10/731832, filed on Dec. 09, 2003, granted, now 7,157,972. | ||
| Claims priority of provisional application 60/435504, filed on Dec. 20, 2002. | ||
| Prior Publication US 2007/0075779 A1, Apr. 05, 2007 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H03F 3/16 (2006.01) | ||
| U.S. Cl. 330—277 [330/310] | 35 Claims |
| 1. A radio-frequency amplifier comprising:
a transistor having an input terminal, an output terminal and a control terminal;
a series-connected feed-through resistance and feed-through capacitance connected in parallel with the input terminal and
the output terminal of the transistor;
a load impedance connected to the output terminal of the transistor; and
wherein the control terminal of the transistor is coupled to common voltage, and the radio-frequency amplifier is driven by
a signal source in series with an impedance Rs coupled between the input terminal and common voltage, wherein a transconductance gm of the transistor is larger than 1/Rs.
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