Abstract A voltage regulator for a battery charging system has a first transistor which when conductive permits current to flow in a field winding of a generator used to charge the battery. A second transistor has its collector-emitter path connected in a circuit across the base emitter path of the first transistor so that conduction of the second transistor removes base current from the first transistor. The second transistor is controlled by voltage sensitive means in its base circuit and the collector of the second transistor is connected to the base of the first transistor through a pair of resistors in series, the junction of the resistors being connected through a capacitor to the collector of the first transistor to minimize radio interference.
A voltage regulator for use in a battery charging system on a road vehicle, including a first planar transistor which when conductive permits current to flow in a field winding of a generator, used to charge the battery of a road vehicle, and a second planar transistor having its collector-emitter path connected in a circuit across the base-emitter path of the first transistor so that when the second transistor conducts base current is removed from the first transistor, and voltage sensitive means controlling conduction of the second transistor to regulate the output voltage of the generator, the collector of the second transistor being connected to the base of the first transistor through a pair of resistors in series, and the junction of said resistors being connected through a capacitor to the collector of the first transistor, the pair of resistors and capacitor serving to minimize radio interference.
Claim 2
Dependent Claim
147 words
A voltage regulator for use in a battery charging system on a road vehicle, including a first planar transistor which when conductive permits current to flow in a field winding of a generator, used to charge the battery of a road vehicle, and a second planar transistor having its collector-emitter path connected in a circuit across the base-emitter path of the first transistor so that when the second transistor conducts base current is removed from the first transistor, and voltage sensitive means controlling conduction of the second transistor to regulate the output voltage of the generator, the collector of the second transistor being connected to the base of the first transistor through a pair of resistors in series, and the junction of said resistors being connected through a capacitor to the collector of the first transistor, the pair of resistors and capacitor serving to minimize radio interference.