Patent ID: 6970557

Claim:
A cordless telephone-to-sound card interface adapter for providing mobility to an end user during voice communications over the Internet, comprising: a housing unit; a hybrid transformer circuit carried and contained within the housing unit; a telephone jack carried along a side edge of the housing unit for coupling to a cordless telephone system using a telephone cord; a speaker plug cable which extends from the housing unit and terminates in a â…› inch speaker miniplug which is configured to connect with a speaker jack of a computer sound card; a microphone plug cable which extends from the housing unit and terminates in a â…› inch microphone miniplug which is configured to connect with a microphone jack of the computer sound card; the hybrid transformer circuit including: a first hybrid transformer having a single coil A inductively coupled to two coils B and C which are formed along the same core; a second hybrid transformer having a single coil F inductively coupled to two coils D and E which are formed along the same core; an impedance matching circuit; a first terminal of the coil C and a first terminal of the coil E coupled to the telephone jack; a second terminal of the coil C coupled to a second terminal of the coil E; first and second terminals of the coil A coupled to the speaker plug cable; first and second terminals of the coil F coupled to the microphone plug cable; a first terminal of the coil B coupled to a second terminal of the coil D; and a second terminal of the coil B and a first terminal of the coil D coupled to the impedance matching circuit.