Cartridge memory protection

Abstract

Abstract Translated from German Cartridge (1) contains memory (40a-40h) and a back-up battery (13). Terminals (5a-5i) of the cartridge (1) plug into terminals (7a-7i) of a host machine (3). Positive deactivation of the write control is achieved by both the base and emitter of a bipolar transmitter (52) being deactivated when the cartridge (1) is unplugged. Battery voltage then appears at read/write control line (64) through resistor (56) connected to the collector of the transistor (52). This brings the control line (64) to the read status and positively protects data in memory (40a-40h) against transient signals, which may occur especially during plug in when the host (3) is activated, or from electrostatic charges. Cartridge (1) contains memory (40a-40h) and a back-up battery (13). Terminals (5a-5i) of the cartridge (1) plug into terminals (7a-7i) of a host machine (3). Positive deactivation of the write control is achieved by both the base and emitter of a bipolar transmitter (52) being deactivated when the cartridge (1) is unplugged. Battery voltage then appears at read / write control line (64) through resistor (56) connected to the collector of the transistor (52). This brings the control line (64) to the read status and positively protects data in memory (40a-40h) against transient signals, which may occur especially during plug in when the host (3) is activated, or from electrostatic charges.

Inventors

• 👤 Jeri Lynn Gerber
• 👤 Jorge Luis Nazario
• 👤 Victor Michael Simi

Bibliographic Details