Patent ID: 8547185

Claim:
An electronic balun circuit for converting a single-ended electronic signal into a differential electronic signal, comprising: a center-tapped inductor comprising a first node, a center-tap coupled with a constant voltage source, and a second node; a first impedance circuit having an input impedance of 2Rin, wherein input of said first impedance circuit is operably coupled with said first node and with a line carrying said single-ended electronic signal to said first node, and wherein Rin is impedance of said line carrying said single-ended electronic signal; a second impedance circuit having an input impedance of 2Rin, wherein input of said second impedance circuit is operably coupled with said second node, and wherein said first node receives said single-ended electronic signal to produce said differential electronic signal at said first node and said second node; and a capacitor for coupling said first node with a signal ground, wherein said capacitor is variable to allow said electronic balun circuit to be tuned for varying operating frequency of said electronic balun circuit; whereby said input impedance of 2Rin of each of said first impedance circuit and said second impedance circuit results in a total effective impedance of Rin for achieving an impedance match between said line carrying said single-ended electronic signal and said first node.