Dual-mode amplifier

Details Dual-mode amplifier Dual-mode amplifier

H - Electricity

03

G

330/37

H03G 11/08 (2006.01) H03K 5/02 (2006.01) H03K 6/02 (2006.01) H03K 17/64 (2006.01) H03K 17/66 (2006.01)

Patent

CA 1175117

-13- ABSTRACT A circuit, including a dual-Mode amplifier, for pro- ducing a controlled current through an inductance; in par- ticular, the inductive yoke of a cathode-ray tube electro- magnetic deflection system. A diode coupled to a fly-back capacitor operates automatically to connect the capacitor in parallel resonant connection with the yoke whenever the voltage induced in the yoke exceeds a predetermined value, thereby switching the circuit from a linear mode to a non- linear mode. In a repetitive beam-sweeping environment, the circuit operates in the linear mode during forward scan time and in the non-linear mode during reverse re- trace time. In the more general case, the circuit switch- es from linear operation to non-linear operation whenever the rate of change of a single input signal exceeds a pre- determined design rate.

371598

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