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Voltage Booster

IP.com Disclosure Number: IPCOM000095793D
Original Publication Date: 1964-Jul-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 24K

Publishing Venue

IBM

Related People

Hoffman, HP: AUTHOR

Abstract

Voltage boosting across output inductor 10 for rise time improvement is accomplished by discharging a capacitor through a switching arrangement.

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Voltage Booster

Voltage boosting across output inductor 10 for rise time improvement is accomplished by discharging a capacitor through a switching arrangement.

Initially, transistor switches 12 and 13 are non-conducting and permit capacitor 15 to charge through resistor 16 and diode 17 to the potential applied at terminal 20. Simultaneous application of signals at 18 and 19 for causing 12 and 13 to conduct places the charge potential of 15 in series aiding relation with the potential applied at 20 for energizing inductor 10. Thus, the charge across 15 acts as a temporary booster battery substantially doubling the potential initially applied across 10.

As the apparent impedance of 15 increases from discharging, the current path shifts to the subsequently lower impedance through 17. At that time, 12 can be rendered non-conductive allowing 15 to begin recharging while 13 is left in a conducting state for a longer period to accommodate the current from 10. To obviate the need for separate conduction signals at 18 and 19, a single conducting pulse can be directly coupled to 19 and capacitively coupled to 18.

The circuitry permits utilization of low supply voltages and reduces power dissipation for a given rise time.

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