摘要:
In a switching power supply of the feed forward or push pull type, the voltage self induced in an output filtering inductor (7), which periodically equals an output voltage (V0) to be controlled, is detected by means of a measurement winding (11), magnetically coupled to the inductor (7) and used to charge a measurement capacitor (13) at a voltage level univocally related to the detected voltage, the charging voltage of the measurement capacitor or a fraction thereof being input as feedback signal, obtained by circuits electrically isolated from the power supply output, to control circuits (10) of the power supply.
摘要:
Single regulation power supply with load compensation of an auxiliary voltage output, wherein power is transferred from the primary winding of a transformer to a first and a second secondary windings each coupled to a rectifying and filtering network respectively providing in output a main and an auxiliary voltage, where a control loop senses the algebraic sum of the main output voltage and the voltage drop caused In a resistor by current drained by a load from the auxiliary voltage output and controls current pulses applied to the primary winding so as to keep constant such sum, whereby rendering the auxiliary voltage unsensitive to load changes at the auxiliary output, at any desired extent determined by the value of such resistor, with the trade of a limited degradation in the control of the main voltage output.
摘要:
A constant voltage drop voltage regulator for low power dissipation electronic systems which, from a first regulated supply voltage (V1) on the order of few volts, obtains a second regulated supply voltage (V2) (having the same regulating characteristics as the first in absolute value) a predetermined fraction of a volt lower than the first, by means of a MOSFET (1) in series between the input (2) and the output (4) of the regulator, the conductivity of the MOSFET (1) being varied by a control circuit (5) which is powered from a voltage multiplier (12) at a voltage (VT) multiple of the first voltage (V1), by comparison of the voltage drop due to the MOSFET (1) and suitably amplified with a predetermined reference voltage (VREF), the comparison error, as amplified with a high gain, being applied as a control signal to the gate electrode of the MOSFET (1).
摘要:
Apparatus for the electrical powering of a removable unit (3) connected to a data processing system through electrical connection pins (7,8,9), comprising circuits (10,11,12,13,14,15) for detecting the insertion of the removable unit in the system, through the grounding of one (7) of the pins by the removable unit, for applying a gradually increasing voltage to the powering pins (8,9) of the removable unit and for connecting the powering pins (8,9) of the removable unit to a system voltage source (1) by switching on electromagnetic switches (16,17) once the powering pins have been electrically biased, the energization of the electromagnetic switches being enabled through the grounding, by the removable unit, of one(7) of the pins.