Saturating transformer reference circuit

The theory of operation of a static magnetic reference device is described. Test results for a practical example show that an output of 15 ± 0.2 milliampere into a 50-ohm resistive load can be obtained for an input of 100 to 140 volts, 360 to 440 cycles per second, from -55 degrees centigrade (C) to + 100 C ambient temperature. The power input to the device is 5 watts.