Semiconductor integrated circuit including a mixer and...

Telecommunications – Transmitter – Having harmonic radiation suppression

Reexamination Certificate

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Details

C332S107000, C332S160000, C375S296000

Reexamination Certificate

active

08073408

ABSTRACT:
A semiconductor integrated circuit includes a first input terminal configured to input a baseband signal, a second input terminal configured to input a local oscillation signal, an output terminal configured to output a modulating signal, a first amplifier circuit configured to receive the baseband signal through the first input terminal and to output a first amplified signal of the baseband signal, a 2-multiplying circuit configured to receive the local oscillation signal through the second input terminal and to output a 2-multiplied signal of the local oscillation signal, an adder configured to add the 2-multiplied signal and the first amplified signal and to output an addition signal, a second amplifier circuit configured to receive the addition signal and to output a second amplified signal of the addition signal, and a mixer configured to multiply the second amplified signal and the local oscillation signal and to output the modulating signal to the output terminal.

REFERENCES:
patent: 5041793 (1991-08-01), Gailus
patent: 63-175507 (1988-07-01), None
patent: 2003-69344 (2003-03-01), None
patent: 2003-163601 (2003-06-01), None
patent: 2006-295828 (2006-10-01), None
Japanese Office Action issued Feb. 15, 2011, in Patent Application No. 2008-163383 (with English-language translation).
A. Mirzaei et al., “A Low-Power WCDMA Transmitter with an Integrated Notch Filter”, Digest of Technical Papers, ISSCC 2008/ Session 10/ Cellular Transceivers/ 10.7, pp. 212-213 and continuation p. 608.

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