Current driver

Details Current driver Current driver

2007-03-20

2007-03-20

Vu, Bao Q. (Department: 2838)

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

C327S539000, C327S538000, C327S535000

Reexamination Certificate

active

11353332

ABSTRACT:
A current driver that can control variation in the consumed current in conjunction with variation in the setting value of the driving current. The mirror current of transistors Q2-0to Q2-7at each of output circuits10-1to10-160keeps flowing through output terminal To1or node N8irrespective of the setting value of the pixel data. Also, the mirror current of transistor Q4D keeps flowing in the series circuit of transistors Q4D and Q5D irrespective of the setting value of the pixel data. Consequently, even when the setting value of the driving current varies in various ways, the current consumed in each output circuit can still be kept constant. As a result, it is possible to prevent variation in the voltage of the power supply line in conjunction with variation of the consumed current, and it is possible to reduce fluctuation in the driving current between output channels.

REFERENCES:
patent: 5479091 (1995-12-01), Chloupek
patent: 5703477 (1997-12-01), Punzenberger
patent: 6147479 (2000-11-01), Lee
patent: 6323631 (2001-11-01), Juang
patent: 6922045 (2005-07-01), Self et al.
patent: 7129773 (2006-10-01), Ito et al.

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