Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1995-10-04
1997-06-03
Hecker, Stuart N.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323315, G05F 1573
Patent
active
056358237
ABSTRACT:
In a current detector circuit wherein the sense current flowing through a sense transistor for sensing part of the main current flowing through a main element transistor is flowed through the detection resistor to cause the bipolar or MOS control transistor to detect the voltage drop across the detection resistor, a compensation diode connected to the base or gate of the control transistor and the emitter of the sense transistor and a forward bias generation resistor element for generating a forward bias applied to the diode for a time interval during which the main current flows are arranged. When a sense current flowing through a sense element for sensing part of a main current flowing through a main element is to be flowed through a detection resistor to cause a control transistor to detect a voltage drop across through the detection resistor, the temperature dependence of a threshold voltage between the base and emitter of the control transistor is compensated for, and an output current is detected with an almost constant current level during an operation.
REFERENCES:
patent: 4553084 (1985-11-01), Wrathall
patent: 4672302 (1987-06-01), DeShazo, Jr. et al.
patent: 4914542 (1990-04-01), Wagoner
patent: 5545970 (1996-08-01), Parkes, Jr. et al.
patent: 5550462 (1996-08-01), Nakajima
Murakami Koichi
Oomichi Motohiro
Hecker Stuart N.
Kabushiki Kaisha Toshiba
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