Driver circuit for generating pulses

U.S. Patent Number: 5391933

Abstract: A driver circuit for producing pulses has first and second, sequentially connected differential amplifier stages and first and second adjustable offset voltage sources. The first offset voltage source is connected to an input of the first differential amplifier stage so that the pulse-duty ratio of a differential signal generated by the first differential amplifier stage is variable by adjusting the first offset voltage. The second offset voltage source is connected to an input of the second differential amplifier stage so that the turn-on voltage of a first transistor in the second differential amplifier stage, which is connected to an output of the driver circuit, can be made smaller by adjustment of the second offset voltage, which simultaneously results in an increase in the turn-off voltage for that transistor. The driver circuit is particularly suited for operating laser diodes in optical transmission systems and for pulse generators in measurement equipment.

Inventors: Rein; Hans-Martin (Witten, DE)

Assignee: Siemens Aktiengesellschaft (Munich, DE)

Application Number: 07/958,703

Issued: 1995-02-21

Expired: 2007-02-21

Classes: 327/108 ; 327/65

Field of search: 307/270,494,268

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