applications a 34 self biasing 34 dc lead on the inactive leg of the transformer is connected to a built in toggle fault detector circuit which functions to minimize the parts count and overall power consumption of the circuit specifically the digital signals input to converter circuit 400 are coupled via 50 ohm transmission lines l1 and l2 from ecl level input stage 410 to the primary leads of rf transformer 420 the switching rate of the input signals is about 52 mbits sec in a preferred embodiment rf transformer 420 may be a 1 3 voltage ratio transformer impedance ratio of 1 9 such as for example a t9 1 transformer manufactured by mini circuits inc typically transformer 420 will amplify the ecl level input signals from about 1 6 v peak to peak to about 4 8 v peak to peak consequently the output signal from circuit 400 to the cmos gate will be at an acceptable cmos signal level in high speed switching applications typical ecl level signals range from about 1 v to 2 v and acceptable cmos level signals range from about 0 v to 5 v however without any particularized treatment of the amplified ecl signals at the secondary of transformer 420 no diodes used the output signals to the cmos gate could swing in a negative direction as low as 2 4 v 1 2 the p p voltage which is not within the acceptable range of cmos.