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Low voltage, high-speed output-stage for laser or modulator driving

A driver circuit, output node technology, applied in the direction of improving amplifiers to improve efficiency, amplifiers with semiconductor devices/discharge tubes, amplifiers, etc., can solve the requirements of hindering rise/fall time, increase power consumption, reduce current efficiency, etc. question

Inactive Publication Date: 2012-08-08
卡莱汉系乐有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a resistor to ground or positive supply to fix the output impedance as desired is not a good idea as it will increase power dissipation and also reduce current efficiency
In addition, the output transistor introduces a large capacitance that must be charged and discharged during each transition of the drive pulse signal, which also hinders the rise / fall time requirements

Method used

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  • Low voltage, high-speed output-stage for laser or modulator driving
  • Low voltage, high-speed output-stage for laser or modulator driving
  • Low voltage, high-speed output-stage for laser or modulator driving

Examples

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Embodiment Construction

[0035] As an overall view, Figure 4 A block diagram of a driver circuit 10 according to a preferred embodiment is shown. The driver circuit 10 comprises: a slew rate control means or slew rate control stage 100; three current scaling amplification means or gain stages 200, 201, 202; a push / pull driver 300 and an output means or single-ended Output stage 400. The slew rate control stage 100 allows control of the rise and fall times of the drive pulse signal and thus of the driven load current eg by a variable external voltage. In other words, the slew rate control stage 100 speeds up (or slows down) the pulse falling edge of the drive pulse signal so that the corresponding edge of the signal in the laser diode is strengthened (or smoothed) according to the rise / fall time requirements. The gain stages 200, 201, 202 are differential translinear cells with active loads that limit the amplitude of the drive pulse signal to a maximum peak-to-peak difference of 100 mV (diff-pp). ...

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PUM

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Abstract

The present invention provides a driving circuit(100), in particular for driving a laser diode(700) or a modulator, at data speed in the order of Gb / s. The driving circuit(10) has a lowvoltage, high-speed output stage capable of driving efficiently a laser diode or a modulator. The driver circuit(10) comprises a chain of circuits, said chain comprising a slew-rate control circuit, at least one translinear amplifier(200,201,202), a push / pull stage(300), and an output stage(400) for driving the load current. Due to its versatility, the driver can be used in other applications e.g. line drivers,cable drivers, high-speed serial interfaces for back-plane interconnect, etc. The driver can work at low supply voltages, e.g. 3.3V nominal down to 2.7V, with high power efficiency. One major clue isto use entirely the large signal current produced by the output stage, e.g. in the driven laser diode, without wasting current in supply lines.

Description

technical field [0001] The invention relates to a driver circuit according to claim 1 for driving a load current at an output node in dependence on a drive pulse signal and a method according to claim 14 . In particular, it relates to a driver circuit for driving a laser diode or a modulator, such as a Mach-Zehnder modulator. Additionally, the driver circuits can be used in applications such as line drivers, cable drivers, and high speed serial interfaces for reverse interconnects. Background technique [0002] Optical transceiver modules provide the interface between electronic systems and optical transmission media such as fiber optics. Correspondingly, most optoelectronic transceiver modules contain electrical-to-optical conversion circuitry for transferring data between electronic systems and optical transmission media. Typically, transceiver modules use laser diodes that generate coherent light for performing high-speed data transmission between electronic systems and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K19/003
CPCH03F3/45089H03F3/30H03K17/16H03F3/217H03F2203/45248H03F1/02H03F2203/45366
Inventor 米哈伊·A·T·森杜拉努爱德华·F·斯蒂克福特
Owner 卡莱汉系乐有限公司