Output circuit with signal level shift

Details Output circuit with signal level shift Output circuit with signal level shift

2004-12-01

2008-08-05

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Current driver

C327S108000, C327S333000, C326S080000

Reexamination Certificate

active

07408389

ABSTRACT:
In a level shifting circuit, by supplying current to a gate resistor, a bias is applied to a gate of a transistor. Further, current corresponding to the current which flowed through the gate resistor flows through a first current path of a current mirror circuit, and the current mirror circuit functions to supply current corresponding to the current which flowed through the gate resistor to a source of the transistor. Therefore, current corresponding to the current which flowed through the gate resistor is supplied to an output resistor and it is possible to output a voltage in response to a voltage drop related to the supplied current. Therefore, level shifting can be performed to an input signal for outputting.

REFERENCES:
patent: 4855618 (1989-08-01), Brokaw
patent: 4890010 (1989-12-01), Neudeck et al.
patent: 5736774 (1998-04-01), Fujihira
patent: 6307401 (2001-10-01), Bridgewater, Jr.
patent: 6400212 (2002-06-01), Sakurai
patent: 0 294 882 (1988-12-01), None
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patent: 05-316755 (1993-11-01), None
patent: 2001-147243 (2001-05-01), None
patent: 2002-026714 (2002-01-01), None
patent: 2003-032102 (2003-01-01), None
European Office Action for Corresponding Application 10 2004 055 452.8-32 Issued Feb. 8, 2007.

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