Low input voltage precision dc-to-dc voltage converter circuit

Details Low input voltage precision dc-to-dc voltage converter circuit Low input voltage precision dc-to-dc voltage converter circuit

H - Electricity

02

M

321/29

H02M 3/156 (2006.01)

Patent

CA 1225697

LOW INPUT VOLTAGE PRECISION DC-TO-DC VOLTAGE CONVERTER CIRCUIT ABSTRACT A DC-to-DC up-converter (41) of the type wherein voltage is built up across a capacitor (17) by alternately connecting a coil (19) by means of a pulse width modulator- controlled switching transistor (23) across a low DC voltage source (13') and, in series with that source, across the capacitor (17). Operation is initiated by converting the switching circuit into a blocking oscillator, running the oscillator from the low DC voltage source, and using the up-converted voltage to power the rest of the up-converter, making it possible to run the entire up-converter circuit from a very low voltage source.

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