Semiconductor integrated circuit

Details Semiconductor integrated circuit Semiconductor integrated circuit

2006-10-17

2006-10-17

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S307000, C330S310000

Reexamination Certificate

active

07123093

ABSTRACT:
The output of a differential amplifier circuit group (PA) that amplifies signals inputted to input PINs is connected to a final-stage differential amplifier circuit (PAn). The output of the differential amplifier circuit (PAn) is connected to a detection (DET) circuit. A detect signal sent from the DET circuit is outputted to the (−) side input of a comparator. A bias signal (BP) outputted from a bias circuit is inputted to the base of a PMOS transistor of a source follower circuit. An output signal (SFOUT) outputted from a source terminal thereof is inputted to the (+) side input of the comparator. A result of comparison between the bias signal (BP) and the output signal (SFOUT) is outputted from the comparator as an output signal (COMPOUT).

REFERENCES:
patent: 5652545 (1997-07-01), Miyashita et al.
patent: 03-278110 (1991-12-01), None

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