Peak voltage clamped power supply
Patent
·
OSTI ID:6762071
The cost and energy efficiency of a power supply are optimized in a semi-regulated circuit wherein regulation occurs only under a high voltage, low current condition when peak output voltage would otherwise exceed a maximum specified voltage. The circuit includes a full wave rectifier driving a modified pi filter. A transistor in series with the filter is biased by a resistor to normally operate in a fully saturated, low power dissipating mode. When the output voltage approaches the specified maximum, the breakdown voltage of a zener diode is exceeded, and the output voltage is clamped to the specified maximum through the zener diode and the base-emitter junction of the transistor.
- Assignee:
- Western Electric Co. Inc.
- Patent Number(s):
- US 4437148
- OSTI ID:
- 6762071
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
CAPACITORS
CURRENT LIMITERS
CURRENTS
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
PEAK LOAD
POWER SUPPLIES
RECTIFIERS
SEMICONDUCTOR DEVICES
TRANSISTORS
VOLTAGE REGULATORS
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
CAPACITORS
CURRENT LIMITERS
CURRENTS
DIRECT CURRENT
ELECTRIC CURRENTS
ELECTRIC IMPEDANCE
ELECTRICAL EQUIPMENT
ELECTRONIC CIRCUITS
ELECTRONIC EQUIPMENT
EQUIPMENT
IMPEDANCE
PEAK LOAD
POWER SUPPLIES
RECTIFIERS
SEMICONDUCTOR DEVICES
TRANSISTORS
VOLTAGE REGULATORS