Circuit for controlling the load current level in a transistor

Details Circuit for controlling the load current level in a transistor Circuit for controlling the load current level in a transistor

1986-03-06

1987-06-09

Beha, Jr., William H.

Electricity: power supply or regulation systems

Output level responsive

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

323285, 361 18, 361 98, G05F 1573

Patent

active

046723021

ABSTRACT:
A circuit for limiting the load current through a transistor switch, where the load is connected between the collector of the transistor switch and a first power terminal and a resistive element, whose impedance is much less than that of the load, is connected between the emitter of the transistor switch and a second power terminal. The circuit includes first and second comparator transistors, with the emitter of the first transistor being connected to the emitter of the transistor switch and the emitter of the second transistor being connected to the second power terminal. The same potential is applied to the bases of the first and second comparator transistors whereby the difference between their base-to-emitter voltages is equal to the voltage drop across the resistive element. The collector currents of the first and second transistors are compared and the difference in the currents is used to control the conductivity of the transistor switch.

REFERENCES:
patent: 3796943 (1974-03-01), Nelson et al.
patent: 4311954 (1982-01-01), Capel
patent: 4428016 (1984-01-01), Brasfield
patent: 4567537 (1986-01-01), Kalkhof et al.

Affiliated with

Also associated with

Rating

Circuit for controlling the load current level in a transistor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for controlling the load current level in a transistor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for controlling the load current level in a transistor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1831242