Multistage amplifier and integrated circuit

Details Multistage amplifier and integrated circuit Multistage amplifier and integrated circuit

2005-03-01

2005-03-01

Choe, Henry (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including plural stages cascaded

C330S150000

Reexamination Certificate

active

06861910

ABSTRACT:
An initial-stage amplifier1that deals with microsignals and other amplifiers2and3separate a power source line, and both separated power source lines4and8are commonly connected to a power source pad6. This enables avoidance of the occurrence of a large potential difference between the initial-stage amplifier1and other amplifiers2and3due to differences in currents pulled to the amplifiers1to3, and can prevent the occurrence of noise arising from such potential difference. Also, feedback loops are differentiated by the initial-stage amplifier1and other amplifiers2and3. This can also prevent unfavorable effects where a large signal would be fed back from the rear-stage amplifiers2and3to the initial-stage amplifier1.

REFERENCES:
patent: 4237426 (1980-12-01), Sueyoshi
patent: 4268797 (1981-05-01), Buck et al.
patent: 4935705 (1990-06-01), Estanislao et al.
patent: 5982236 (1999-11-01), Ishikawa et al.
patent: 45-24246 (1970-09-01), None
patent: 62-8600 (1987-02-01), None
patent: 10-294828 (1998-11-01), None
patent: 2002-026664 (2002-01-01), None

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