H - Electricity – 03 – K
Patent
H - Electricity
03
K
323/6, 352/40.5
H03K 17/64 (2006.01) G11C 11/02 (2006.01)
Patent
CA 1051548
Abstract of the Disclosure A low power, fast rise time current driver for an inductive load such as a sense-inhibit line of a magnetic core memory includes a transformer having a secondary thereof coupled to drive a load and the primary coupled to be driven by a constant voltage during steady state conditions. A charged capacitor is initially coupled in series with the primary drive voltage and as the capacitor discharges there is a gradual, smooth transition from a high initial voltage which induces a rapid load current rise time to a steady state voltage level induced by the voltage source. An advantageous charging circuit for the capacitor permits the utilization of energy stored by the inductive load immediately prior to termination of the load drive current, to be used to charge the capacitor. A constant load drive current having a fast rise time without substantial overshoot or critical timing requirements is thus attained without the dissipation of substantial power by the current driver circuitry.
229529
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