Patent ID: 7023718

Claim:
A two-phase driver comprising: a first loading loop and a second loading loop, said first and second loading loops being individually operable one apart from the other; a first transformer having a primary side and a secondary side connected to said first loading loop; a second transformer having a primary side and a secondary side connected to said second load loop; a first switch assembly connected between an input voltage and a reference and including a first high-side switch connected between said input voltage and a first node connected to respective first terminals of said primary sides of said first and second transformers and a first low-side switch connected between said first node and reference; a second switch assembly connected between said input voltage and reference for forming a first H-bridge circuit in combination with said first switch assembly to thereby modulate a first current flowing through said primary side of said first transformer, said second switch assembly including a second high-side switch connected between said input voltage and a second node connected to a second terminal of said primary side of said first transformer and a second low-side switch connected between said second node and reference; and a third switch assembly connected between said input voltage and reference for forming a second H-bridge circuit in combination with said first switch assembly to thereby modulate a second current flowing through said primary side of said second transformer, said third switch assembly including a third high-side switch connected between said input voltage and a third node connected to a second terminal of said primary side of said second transformer and a third low-side switch connected between said third node and reference; wherein said high-side switches and low-side switches are switched by first to sixth signals, respectively.