Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1994-12-21
1997-06-24
Sterrett, Jeffrey L.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323275, G05F 1573
Patent
active
056420340
ABSTRACT:
In a regulated power supply circuit, a "J characteristic curve" is obtained between an output current and an output voltage. Moreover, the output current is minimized in a grounded state in which the output terminal is grounded to minimize heat dissipation so as to facilitate circuit integration. Between the input and output terminals, there are connected an output-stage transistor and a current sense resistor in series. A voltage sense circuit senses voltage between an output terminal of the transistor and a ground terminal. The current sense circuit senses the output current by the current sense resistor. The transistor has a base terminal connected to output terminals of the voltage and current sense circuits, respectively. In this configuration, when the output terminal is grounded, the output current is set independently of a current value sensed at occurrence of an excess current. This consequently lowers the power consumption of the regulated voltage circuit in the grounded state.
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NEC Corporation
Sterrett Jeffrey L.
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