Circuit in cmos technology for high speed driving of optical...

Details Circuit in cmos technology for high speed driving of optical... Circuit in cmos technology for high speed driving of optical...

H - Electricity

01

S

H01S 3/10 (2006.01) H01S 5/042 (2006.01) H04B 10/04 (2006.01) H01S 5/40 (2006.01)

Patent

CA 2203489

A high speed drive circuit for optical sources. The circuit comprises bias and modulation current generators for both p-type and n-type optical sources, and a pair of control voltage sources for controlling the bias and modulation current generators, which obtain pairs of control voltages from an adjustable driving current. The circuit includes control logic and CMOS gates for selecting between the p-type and n-type generators by means of an external signal. The circuit is fabricated as an integrated circuit having three pads, one for each control voltage source and the third pad comprises the current generators, the CMOS gates and the control logic circuit.

L'invention est un circuit d'attaque rapide pour les sources lumineuses. Ce circuit comporte des générateurs de courants de polarisation et de modulation pour les sources lumineuses de types p et n, et une paire de sources de tension de commande servant à contrôler les générateurs de courants de polarisation et de modulation, lesquels obtiennent des paires de tensions de commande sous l'effet d'un courant d'attaque ajustable. Le circuit de l'invention comporte un circuit logique de commande et des portes CMOS servant à faire un choix entre les générateurs de type p et de type n au moyen d'un signal externe. Il est fabriqué sous la forme d'un circuit intégré comportant trois blocs, un pour chacune des deux sources de tension de commande et le troisième pour les générateurs de courant, les portes CMOS et le circuit logique de commande.

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