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US 2026/0121628 A1Published application
Dml driver
AssigneeNippon Telegraph and Telephone Corporation
InventorToshiki Kishi
Life of this patent
Estimating the term…
Abstract
A DML driver includes a PMOS transistor, an NMOS transistor, an inductor, a resistor, and an optical waveform compensation function unit connected between a source of the NMOS transistor and the ground. The optical waveform compensation function unit includes an NMOS transistor, an inductor, a capacitor, and a resistor.
Claims12
1-8. (canceled)
A DML driver comprising:
- a first transistor having a gate or base connected to a first bias voltage, a source or emitter connected to a first power supply voltage, and a drain or collector connected to an anode of a laser diode;
- a second transistor having a drain or collector connected to the anode of the laser diode;
- a first inductor to which a modulation signal is configured to be input at a first end, and a second end of the first inductor being connected to a gate or base of the second transistor;
- a first resistor having a first end connected to a second bias voltage and a second end connected to the first end of the first inductor;
- and
- an optical waveform compensation function circuit connected between a source or emitter of the second transistor and a second power supply voltage, wherein
- the optical waveform compensation function circuit includes:
- a third transistor in which a control voltage is configured to be input to a gate or base, a drain or collector is connected to the source or emitter of the second transistor, and a source or emitter is connected to the second power supply voltage;
- a second inductor having a first end connected to the drain or collector of the third transistor and a second end connected to the second power supply voltage;
- a first capacitor having a first end connected to the drain or collector of the third transistor;
- a second capacitor having a first end connected to the drain or collector of the third transistor and a second end connected to the second power supply voltage;
- and
- a second resistor having a first end connected to a second end of the first capacitor and a second end connected to the second power supply voltage.
10 more elements
A DML driver comprising:
- a first transistor having a gate or base connected to a first bias voltage, a source or emitter connected to a first power supply voltage, and a drain or collector connected to an anode of a laser diode;
- a second transistor having a gate or base connected to a second bias voltage;
- a third transistor cascode-connected between the anode of the laser diode and a drain or collector of the second transistor;
- a first inductor to which a modulation signal is configured to be input at a first end, and a second end of the first inductor being connected to a gate or base of the third transistor;
- a first resistor having a first end connected to a third bias voltage and a second end connected to the first end of the first inductor;
- and
- an optical waveform compensation function circuit connected between a source or emitter of the second transistor and a second power supply voltage, wherein
- the optical waveform compensation function circuit includes:
- a fourth transistor in which a control voltage is input to a gate or base, a drain or collector is connected to the source or emitter of the second transistor, and a source or emitter is connected to the second power supply voltage;
- a second inductor having a first end connected to the drain or collector of the fourth transistor and a second end connected to the second power supply voltage;
- a first capacitor having a first end connected to the drain or collector of the fourth transistor;
- a second capacitor having a first end connected to the drain or collector of the fourth transistor and a second end connected to the second power supply voltage;
- and
- a second resistor having a first end connected to a second end of the first capacitor and a second end connected to the second power supply voltage.
11 more elements
Dependencies are inferred from the claim text.