| 摘要 |
<p>1278638 Controlled non linear reactors WALTHER-BUROMASCHINEN GmbH 21 Nov 1969 [23 Nov 1968] 57194/69 Heading H3B In an electrical switching circuit, Fig. 1, switching is controlled by saturation or desaturation of a torroidal core 4 of rectangular hysteresis loop material on which a coil 5 is wound, the core having a saturating permanent magnet 6 attached thereto, and a movable magnet 7 being provided to oppose the field of magnet 6. The output of a pulse generator 1 is rectified by diode 8, and the resulting voltage appearing across capacitor 9 controls the output of an amplifier 10. The coil 5 short circuits the generator output when the core 4 is saturated, but on moving the magnets close together a rapid desaturation occurs so that the coil impedance rises and a voltage appears across capacitor 9 to drive the amplifier 10. The pulses have a mark space ratio greater than unity, a value of fifteen being given as an example, and the capacitor 9 and the input resistance of amplifier 10 are chosen such that their time constant is approximately equal to the time between pulses. The generator output may be grounded by series or parallel combinations of similarly cored coils to form OR and AND gates, Figs. 4, 5 (not shown), and a combination of three cored coils with two output amplifiers is described, Fig. 6 (not shown), which is stated to be capable of giving a BCD (binary coded decimal) output.</p> |
