Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-09-20
2005-09-20
Tra, Quan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C323S315000
Reexamination Certificate
active
06946900
ABSTRACT:
Breakdown of a zapping diode is attained through zapping, and causes a switching transistor to be switched off. The switching transistor is connected in parallel with a current-determining transistor for inducing flow of a constant current and which is diode-connected. When the switching transistor is switched off, a current flows through the current-determining transistor. An adjustment current identical with the current flowing through the current-determining transistor flows through an adjustment current transistor which is connected to the current-determining transistor to form a current mirror. When, on the other hand, no zapping is performed, the switching transistor is switched on and the current-determining transistor is switched off, causing no current to flow through the adjustment current transistor. In this manner, with the current-determining transistor being diode-connected, Vce is a constant value, and the ON-resistance does not affect the magnitude of the adjustment current, enabling attainment of a stable adjustment current.
REFERENCES:
patent: 4727309 (1988-02-01), Vajdic et al.
patent: 5455522 (1995-10-01), Jones
patent: 5579356 (1996-11-01), Chevallier
patent: 5675242 (1997-10-01), Nakano
patent: 2002-261243 (2002-09-01), None
Hogan & Hartson LLP
Tra Quan
LandOfFree
Current output circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current output circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current output circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3427761