Abstract: An H-bridge integrated laser driver optimizes power dissipation, impedance matching, low-swing and high-swing reliability for electro-absorption modulated laser (EML) and directly modulated laser diode (DML) applications. The laser driver includes a retimer for converting low-speed parallel data to a high-speed serial bit stream and to an inverted representation of the high-speed parallel bit stream, an M-bit PMOS DAC configured to receive a first buffered bit stream, an N-bit NMOS DAC configured to receive a second buffered bit stream substantially synchronized with the first buffered bit stream. A protective device is coupled between the M-bit DAC and the N-bit DAC.

Abstract: A DC-shifting predriver has an input port configured for coupling to a serial data stream, an inverting output amplifier having an feedback node and an output port configured for coupling to a transistor at the input to a high-speed DAC or TX driver, and a capacitor AC-coupled between the input port and the feedback node. A weak feedback inverter having structure similar to, but less drive strength than the inverting output amplifier is coupled between the output port and the feedback node to act as a positive feedback latch. The predriver provides a DC shift up to 3V with high reliability and minimal intersymbol interference for data rates from 10 GS/s to 28 GS/s or higher. The predriver may provide multiple input ports implemented as a predriver array in an M-bit system, and the output amplifier may consist of N stages.

Abstract: An H-bridge integrated laser driver optimizes power dissipation, impedance matching, low-swing and high-swing reliability for electro-absorption modulated laser (EML) and directly modulated laser diode (DML) applications. The laser driver includes a retimer for converting low-speed parallel data to a high-speed serial bit stream and to an inverted representation of the high-speed parallel bit stream, an M-bit PMOS DAC configured to receive a first buffered bit stream, an N-bit NMOS DAC configured to receive a second buffered bit stream substantially synchronized with the first buffered bit stream. A protective device is coupled between the M-bit DAC and the N-bit DAC.

Abstract: An H-bridge integrated laser driver optimizes power dissipation, impedance matching, low-swing and high-swing reliability for electro-absorption modulated laser (EML) and directly modulated laser diode (DML) applications. The laser driver includes a retimer for converting low-speed parallel data to a high-speed serial bit stream and to an inverted representation of the high-speed parallel bit stream, an M-bit PMOS DAC configured to receive a first buffered bit stream, an N-bit NMOS DAC configured to receive a second buffered bit stream substantially synchronized with the first buffered bit stream. A protective device is coupled between the M-bit DAC and the N-bit DAC.

Abstract: An output stage of a differential line driver generates a differential output signal. A common-mode component of the differential output signal is decoupled from the differential output signal using a common-mode voltage sense. The common-mode component of the differential output signal is provided to a capacitor that is coupled between the output stage and the common-mode voltage sense.

Abstract: An output stage of a differential line driver generates a differential output signal. A common-mode component of the differential output signal is decoupled from the differential output signal using a common-mode voltage sense. The common-mode component of the differential output signal is provided to a capacitor that is coupled between the output stage and the common-mode voltage sense.

Abstract: Disclosed are various embodiments of a current-mode line driver that may facilitate transmitting signals to a load. The current-mode line driver may comprise a common-mode current sense element that provides a signal corresponding to the common-mode output current of the line driver. A transconductance element receives the signal from the common-mode current sense element and provides a compensating current that is based at least in part on the signal. The compensating current may reduce the common-mode output current of the line driver.

Abstract: Disclosed are various embodiments of a current-mode line driver that may facilitate transmitting signals to a load. The current-mode line driver may comprise a common-mode current sense element that provides a signal corresponding to the common-mode output current of the line driver. A transconductance element receives the signal from the common-mode current sense element and provides a compensating current that is based at least in part on the signal. The compensating current may reduce the common-mode output current of the line driver.