Semiconductor integrated circuit

Details Semiconductor integrated circuit Semiconductor integrated circuit

2007-03-09

2009-11-24

Trinh, Sonny (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S326000, C455S323000

Reexamination Certificate

active

07623839

ABSTRACT:
A semiconductor integrated circuit including: a mixer circuit which includes a first MOS transistor a second MOS transistor; a third MOS transistor whose drain is connected to a first potential, and which has a conductivity type and a threshold value which are the same as those of the first MOS transistor and the second MOS transistor; a current source connected between the source of the third MOS transistor and a second potential; a voltage dividing circuit which is connected between the first potential and the second potential, and divides a voltage between the first potential and the second potential to output a divided voltage as a reference voltage; and a differential amplifier circuit whose in-phase input receives the reference voltage, whose anti-phase input receives a source potential of the third MOS transistor, and whose output is connected to a gate of the third MOS transistor.

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patent: 2004-357091 (2004-12-01), None
patent: 2005-184141 (2005-07-01), None

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