A new frequency modulator using ferrite orthogonal cores

A new frequency modulator circuit is presented, which is a new application of small size orthogonal cores. The circuit proposed here has a number of excellent operating characteristics and an extremely simplified construction. The wide variable frequency range is obtained by a small input power. Furthermore, large output voltage, high reliability, isolation characteristic, and low input impedance can be expected from this device. The proposed circuit can be used as a power controlled device and a power telemeter. The operation and circuit configuration of the new frequency modulator are described. The flux behavior of the circuit under frequency modulated condition is examined.