NASA NTRS · 19730000450
Fail-safe bidirectional valve driver
Abstract
Cross-coupled diodes are added to commonly used bidirectional valve driver circuit to protect circuit and power supply. Circuit may be used in systems requiring fail-safe bidirectional valve operation, particularly in chemical- and petroleum-processing control systems and computer-controlled hydraulic or pneumatic systems.
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Fujimoto, H.. 1974-02-01. Fail-safe bidirectional valve driver. https://ntrs.nasa.gov/citations/19730000450
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