Semiconductor integrated circuit device

Details Semiconductor integrated circuit device Semiconductor integrated circuit device

2009-09-09

2011-10-18

Pascal, Robert (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

Reexamination Certificate

active

08040187

ABSTRACT:
A semiconductor integrated circuit device constituting an inverting amplifier employs a cascode current source as a current source. In the semiconductor integrated circuit device, a high-potential-side transistor of the cascode current source and a low-potential-side transistor constituting an amplification portion are shared. The configuration can not only make an output impedance of the cascode current source high and improve current source characteristics but also make a minimum potential at a minimum potential point of the amplification portion low and ensure a sufficient power supply voltage margin.

REFERENCES:
patent: 7358810 (2008-04-01), Kwon et al.
patent: 2001-094362 (2001-04-01), None
patent: 2001-185964 (2001-07-01), None
patent: 2006-60606 (2006-03-01), None
patent: 2006-157644 (2006-06-01), None
patent: 2006-211550 (2006-08-01), None
Office Action issued Jun. 28, 2011, in Japanese Patent Application No. 2009-086572 (with English-language Translation).

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