Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2001-10-16
2003-07-29
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S541000, C327S543000
Reexamination Certificate
active
06600361
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to technology for a semiconductor device, and more particularly, to a start-up circuit included a constant current circuit.
This application is a counterpart of Japanese patent application, Serial Number 317913/2000, filed Oct. 18, 2000, the subject matter of which is incorporated herein by reference.
2. Description of the Related Art
A conventional semiconductor device is shown in FIG. 77 of U.S. Pat. No. 5,191,555. The conventional semiconductor device are comprised of a lot of circuit elements in order to supply a stable constant current.
Recently, the semiconductor device is demanded to be driven by low current, low voltage and fast speed. Also, the semiconductor device is demanded to be manufactured small.
However, the conventional semiconductor device can not satisfy above demands, because the conventional semiconductor device has a lot of circuit elements and a large-scale area for manufacturing the circuit elements.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide a semiconductor device that may be driven by low current.
It is another object of the present invention to provide a semiconductor device that may be driven by low voltage.
It is still another object of the present invention to provide a semiconductor device that may be driven at fast speed.
It is further object of the present invention to provide a semiconductor device that may reduce circuit scale.
According to one aspect of the present invention, for achieving the above object, there is provided a semiconductor device, is provided with a first current mirror circuit which has an input terminal and an output terminal, a second current mirror circuit which has an input terminal and an output terminal, wherein the input terminal of the second current mirror circuit is coupled with the output terminal of the first current mirror circuit, wherein the output terminal of the second current mirror circuit is coupled with the input terminal of the first current mirror circuit, a start-up circuit which supplies current to the input terminal of the second current mirror circuit in accordance with voltage of the input terminal of the first current mirror circuit.
The above and further objects and novel features of the invention will more fully appear from the following detailed description, appended claims and the accompanying drawings.
REFERENCES:
patent: 5191555 (1993-03-01), Tabacco et al.
patent: 5917765 (1999-06-01), Morishita et al.
patent: 6002242 (1999-12-01), Migliavacca
patent: 6356064 (2002-03-01), Tonda
patent: 6441680 (2002-08-01), Leung et al.
patent: 8-186484 (1996-07-01), None
Nagaya Masafumi
Nakajikkoku Masahiko
Cunningham Terry D.
Nguyen Long
Oki Electric Industry Co. Ltd.
Rabin & Berdo P.C.
LandOfFree
Semiconductor device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Semiconductor device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Semiconductor device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3011260