| 摘要 |
A semiconductor laser driver circuit that provides single supply operation over a wide supply voltage range (e.g., 3 V to 5.5 V), is capable of high speed data transmission, and is programmable over a wide laser modulation current range (such as 5 mA to 60 mA). The circuit includes temperature sensitive circuits to adjust for changes in Vbe over the operating temperature range, and to adjust a bias current to maintain transistor gm in the presence of temperature changes. Also included is an adaptive drive feature to accommodate different laser drive currents. Details of these and other features are disclosed.
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