Method and apparatus for setting the amplitude of an analog current in an impedance

摘要

a. Current supply set in terms of voltage. b. Power supply comprising a pulse width modulator 13 receiving the control voltage 11 and the feedback voltage 15 and supplying, at its outputs 21, 23, two equal but offset rectangular pulse trains driving two power transistors 27, 33 linked by means of a transformer 37 and supplying a direct current via rectifiers 45, 47 and a smoothing choke 49 for charging a capacitor 9 connected to the terminals of the load resistor 7 and of a detection resistor 17 serving 19 to supply the feedback voltage. c. The invention relates to voltage regulation circuits. <IMAGE>