A Distributed Optical Driver Realizing High-Swing and High-Bandwidth Output

Abstract

The invention discloses a distributed optical driver for realizing high amplitude and high bandwidth output, and relates to the technical field of the optical driver. The optical driver comprises at least three parallel voltage multiplier amplifier; the in-phase input end and the inverted input end of each voltage multiplier amplifier are respectively connected with one input end of the distributed optical driver; the in-phase input end and the inverted input end of each voltage multiplier amplifier are respectively connected with one output end of the distributed optical driver; the in-phase input end and the inverted input end of the first voltage multiplier amplifier and the in-phase input end and the inverted input end of the last voltage multiplier amplifier are respectively connected with a terminating resistor for absorbing signal reflection. According to the driver provided by the invention, the high swing and high bandwidth output of the optical driver is realized on the premise of complying with the development of the chip manufacturing technology.

Description

technical field [0001] The invention relates to the technical field of optical drivers, in particular to a distributed optical driver for realizing high-swing and high-bandwidth output. Background technique [0002] In the field of optical communication, optical devices such as Mach-Zehnder modulators and electro-absorption modulated lasers are key modules for realizing large-capacity transmission. In order to make the above-mentioned optical device meet various performance indicators in actual use, it is required that the driver of the above-mentioned optical device has the characteristics of high swing and high bandwidth. [0003] However, with the development of chip manufacturing technology (chip size is getting smaller and smaller) and the continuous shrinking of transistor size, the cut-off frequency and breakdown voltage of optical drivers made of traditional transistors are constantly increasing (because the transistor channel The size is getting smaller and the gat...

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Problems solved by technology

[0003] However, with the development of chip manufacturing technology (chip size is getting smaller and smaller) and the continuous shrinking of transistor size, the cut-off frequency and breakdown voltage of optical drivers made of traditional transistors are constantly increasing (because the transistor channel The size is getting smaller and the gate insulating layer is getting thinner, and the maximum voltage that the device can tolerate is getting lower and lower)

Although small-sized transistors are easier to achieve high bandwidth of optical drivers, it is difficult to meet the high voltage characteristics of optical drivers

For example, the Mach-Zehnder modulator requires the differential output swing of its driver to be as high as 6V, while the breakdown voltage of general high-speed transistors is less than 1.8V. It is difficult to achieve the high-swing output requirements of the optical driver by using such low breakdown voltage transistors.

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