Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Reexamination Certificate
2006-07-18
2009-08-18
Nguyen, Duc (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
C455S324000, C455S326000, C327S102000, C327S359000, C327S119000
Reexamination Certificate
active
07577418
ABSTRACT:
A sub-harmonic mixer and a down converter with the sub-harmonic mixer are provided. The sub-harmonic mixer includes a differential amplifying unit, a current buffer unit, and a switching unit. The differential amplifying unit is used to amplify a radio frequency (RF) signal and employs a first resonance circuit to force a leakage signal to flow to a first voltage. The current buffer unit is used to amplify the gain of an output signal of the differential amplifying unit and employs a second resonance circuit to force the leakage signal to flow to a second voltage. Finally, the switching unit switches an output signal of the current buffer unit into a base band signal.
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Chang Jen-Chung
Chen Hsiao-Chin
Hsu Chia-Jung
Lin Tzu-Chao
Lu Shey-Shi
Chow Charles
J.C. Patents
National Taiwan University
Nguyen Duc
United Microelectronics Corp.
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