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DC to DC Converter

IP.com Disclosure Number: IPCOM000095567D
Original Publication Date: 1964-Mar-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Tuttle, RA: AUTHOR

Abstract

An unregulated DC voltage is applied to converter 10 where it is inverted to a square-wave alternating voltage of controllable pulse width. Rectification and filtering is accomplished by the rectifier 11 and filter 12, respectively. A portion of the regulated DC output is applied to DC amplifier 13. This provides a DC difference signal relative to a reference voltage. The unregulated DC is used to drive square-wave oscillator 14, the output of which is acted upon by integrator 15 to provide a triangular-wave alternating voltage.

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DC to DC Converter

An unregulated DC voltage is applied to converter 10 where it is inverted to a square-wave alternating voltage of controllable pulse width. Rectification and filtering is accomplished by the rectifier 11 and filter 12, respectively. A portion of the regulated DC output is applied to DC amplifier 13. This provides a DC difference signal relative to a reference voltage. The unregulated DC is used to drive square-wave oscillator 14, the output of which is acted upon by integrator 15 to provide a triangular-wave alternating voltage.

The difference DC voltage, via a combining network 16, serves as a control threshold for the triangular voltage. As shown in the lower drawing, raising and lowering of the triangular signal in this manner causes converter 10 to be actuated for different periods of time. These are dependent upon where the triangular waves intercept the actuation signal level. Thus, the converter 10 output is a train of pulses of fixed repetition rate with pulse width varying to correspond to the DC output voltage. Pulse width modulation of the converter pulse train provides a highly accurate regulation of the DC output voltage.

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