A Large Current and High Speed Laser Diode Driver Using Switch Position Modification
Graduate School of Information, Production and Systems, Waseda University, Edo, Tōkyō, JapanDOI: 10.1109/ICCCAS.2006.285141 Conference: Communications, Circuits and Systems Proceedings, 2006 International Conference on, Volume: 4
Source: IEEE Xplore
This paper describes how to realize the high speed laser diode driver (LDD) circuit with high performance signal and large output current to drive the laser diode device. Based on the introduced idea of "switch position modification (SPM)", two types of LDD circuit architectures, including "combination switch mode (CSM)" and "source follower mode (SFM)", have been proposed to satisfy the output signal requirements. Under the corresponding design specification, the CSM architecture was selected to realize the effective LDD circuit design. Moreover, the signal integrity problems, such as overshoot, undershoot and slew-rate, have also been improved in the new CSM architecture. In addition, appropriate transistor size selection and circuit combination can further amend the signal waveform. The LDD circuit was realized in a 0.6-mum CMOS technology. And the output current can reach several hundred milliampere with good signal integrity in the experimental simulation results. Thus the introduced "switch position modification" idea and the proposed "combination switch mode" architecture assure the high performance LDD circuit realization and signal output
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ABSTRACT: We proposed the design and implementation of the laser diode driver (LDD) circuitry with large driving current capability and high speed. The novel LDD circuitry with SFM (Source Follower Mode) architecture has been developed and carefully simulated. Besides, we also compared previous SFM architecture with the proposed novel SFM architecture. It can be shown that the novel SFM LDD faster speed performance than that of previous architecture. And novel SFM LDD is better than previous including Slew-Rate, reaction time, overshoot /Undershoot and corner case. The novel LDD is designed and implemented in TSMC 0.35-μm 5V CMOS process.
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ABSTRACT: In this paper, we proposed a high speed and large current laser diode driving circuit with low sensitivity to process variation. It is commonly applied in the DVD player. In a large current and high speed output LDD circuit, topics such as overshoot, undershoot, rising time, falling time and slew-rate are necessary to be considered. Therefore, to improve the signal integrity of Combination Switch Mode (CSM) LDD Architecture in , modification is made. The simulation results show that the output current turned slightly slower in speed, whereas the performance in overshoot and undershoot are significantly improved. Finally, we proposed the Source Degeneration Type with Improve Overshoot Performance (CSM) LDD Architecture. The circuit has been implemented in 0.35-μ m 5V CMOS process and simulated by HSPICE.
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