Patent ID: 8164995
Filing Date: 2012-04-24
Classification: G11B

Abstract:
1. A writing current circuit ( 42 ) adapted for supplying a controlled electrical current to a laser diode ( 34 ) included in a drive ( 10 ) that is adapted for swiftly recording a Digital Video Disc (“DVD”) ( 16 ), the writing current circuit ( 42 ) operating responsive both: a. to write control digital data for controlling operation of the writing current circuit ( b. to serial digital data which controls application of the electrical current to the laser diode ( a plurality of separate current sources ( a. when in a first state activating the receiving current source ( b. when in a second state deactivating the receiving current source ( a. a first current reference voltage signal which controls how much electrical current the current source ( b. a second current reference voltage signal for controlling the charging electrical current supplied to the laser diode ( a complementary voltage reference circuit which, responsive to write control digital data from the control processor (