US 12,093,200 B2
USB signal communication over an optical link
Jianming Yu, Nantong (CN); Zuodong Wang, Beijing (CN); Wei Mao, Palo Alto, CA (US); and Yun Bai, Beijing (CN)
Assigned to WINGCOMM CO. LTD., Nantong (CN)
Filed by WINGCOMM Co. Ltd., Nantong (CN)
Filed on Aug. 4, 2021, as Appl. No. 17/393,924.
Claims priority of application No. 202110155850.9 (CN), filed on Feb. 4, 2021.
Prior Publication US 2022/0245079 A1, Aug. 4, 2022
Int. Cl. G06F 13/12 (2006.01); G06F 13/38 (2006.01); G06F 13/42 (2006.01); H04B 10/40 (2013.01)
CPC G06F 13/385 (2013.01) [G06F 13/4282 (2013.01); H04B 10/40 (2013.01); G06F 2213/0042 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method comprising:
detecting connection of a device circuit to a USB device, including:
transmitting a feedforward electrical pulse through a reactive network; and
detecting a change in a delay of the feedforward electrical pulse responsive to connecting the device circuit to the USB device; and
transmitting an optical signal associated with the detected connection to a host circuit via an optical communication channel, wherein the reactive network is an RC network, and wherein when the USB device is unplugged, the RC network reduces to a purely resistive network disposed in the device circuit.