H - Electricity – 03 – M
Patent
H - Electricity
03
M
H03M 1/66 (2006.01) H03H 11/12 (2006.01) H03K 7/08 (2006.01)
Patent
CA 2401482
The present invention relates to a highly accurate D/A converter. The converter comprises four main building blocks - in logical order of their operation - a DC processing circuit, an analog switching device, a bootstrap circuit, and a third order low-pass filter. The boots trap circuit is interposed between the switching device and the low-pass filter for substantially reducing loading created by the low-pass filter circuit and acting on the switching device. Furthermore, a new modulation scheme is used to eliminate cross-over discontinuity in the continuous analog signal by interposing between each two successive pulses a cross-over correction pulse having opposite polarity and a predetermined fixed pulse- width. The relatively simple circuit is capable of being implemented with parts that are readily available, and more particularly parts that are readily available in radiation hardened versions for space applications such as control of gyroscopes and accelerometers in satellites.
As Represented By The Ministe R. Of National Defence Her Majesty The Queen In Right Of Canada
Freedman & Associates
Paquet Francois J.
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