Patent ID: 11942985
Assignee: nan
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. The 10G rate OLT terminal transceiver integrated chip based on XGSPON and DFB laser according to claim 1, wherein the continuous mode transmitter TX comprises an input buffer INPUT BUFFER, the bypass ByPass, the clock data recovery CDR, the DFB laser driver, a bias current control unit and a modulation current control unit,
wherein one of the bypass ByPass or the clock data recovery CDR path is selected to activate,
an attenuated signal formed by an original high-speed electrical signal (the burst data packet) passing through a metal trace on the PCB board is connected to the input buffer INPUT BUFFER through the chip pins TX_INP and TX_INN, then the input buffer INPUT BUFFER transmits the attenuated signal to the input terminal of the DFB laser driver along the activated path;
a bias current output terminal of the bias current control unit is connected to the chip pin BIAS, and provides a bias current for the DFB laser;
a modulation current output terminal of the modulation current control unit is connected to a modulation current input terminal of the DFB laser driver;
an output terminal of the DFB laser driver is connected to chip pins TX_OUTP and TX_OUTN, and the DFB laser driver provides modulation current for the DFB laser;
the host sends commands to the chip to turn off the bias current and the modulation current through the chip pin TXDIS to turn off the continuous mode transmitter TX.