Demonstration circuit 2219 is an adaptor board to be used with high speed ADCs. It is designed to receive a single-ended signal on J3 and output a differential signal on J1 and J2. This is done with a balun transformer with a range from 5MHz to 3000MHz. The spacing of J1 and J2 is 0.5". This spacing mates with the clock inputs of Linear Technology high speed ADC demo boards.