Karen A Guthrie

US Patent:

20050163247, Jul 28, 2005

Filed:

Jan 15, 2004

Appl. No.:

10/758458

Inventors:

Michael Vlasov - Irvine CA, US
Richard Ward - Laguna Niguel CA, US
Karen Guthrie - Laguna Beach CA, US

International Classification:

H03K019/0175
H04L027/04
H04L027/02
H03C001/52
H03C005/00

US Classification:

375268000, 375300000, 326082000

Abstract:

According to one embodiment, an isolation barrier comprises a transformer and a controlled impedance module. The system side device generates an amplitude modulated clock signal when the system side device is in a transmit mode, and generates an unmodulated clock signal when the system side device is in a receive mode. When the system side device is in the receive mode, the controlled impedance module modulates, according to the data being transmitted by the line side device, the unmodulated clock signal incoming from the system side device. The transformer is utilized in bidirectional data transfer to provide the line side device with the amplitude modulated clock signal generated by the system side device, while providing the system side device with the amplitude modulated clock signal generated by the controlled impedance module and the line side device.