Patent ID: 11928074
Assignee: EVERPRO (WUHAN) TECHNOLOGIES COMPANY LIMITED
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 9:
10. A USB plug adapted for connection to a host, comprising:
a first transmitting unit, a first receiving unit, and a first control unit;
wherein the first transmitting unit comprises a first electrical input port, a first transmitting high-speed transmission circuit and a first output circuit; and
the first receiving unit comprises a first electrical output port, a first receiving high-speed transmission circuit, and a first input circuit; and
the USB plug being connected to the host, the first transmitting unit and the first receiving unit are powered on and enter an initialization mode respectively; and
under the initialization mode, the first input circuit of the first receiving unit continuously detects a first optical signal, the first electrical output port of the first receiving unit performs the receiver termination detection at an interval of t0; when a low-impedance receiver termination (RRX-DC) is detected, the first control unit drives the first output circuit to output the first optical signal and controls the first transmitting unit to enter a transmission mode;
the operating mode of the USB plug further comprises a power saving mode;
wherein the first electrical output port of the USB plug in the power saving mode performs the receiver termination detection at an interval of t2, if the receiver termination is in low-impedance receiver termination, the first control unit drives the first output circuit to emit a second optical signal; and
the first output circuit outputs the first optical signal, when the first electrical input port under the power saving mode, detects the AC signal, and the first transmitting unit enters the transmission mode from the power-saving mode; and
while the first transmitting unit enters the transmission mode, the first receiving unit enters the transmission mode.