CIRCUITO DI RIMEMORIZZAZIONE PER UNA MEMORIA SEMICONDUTRICE

• Main Authors: WIEDMANN SIEGFRIED KURT, HEUBER KLAUS
• Format: Patent
• Language: Italian
• Published: 17.12.1986
• Edition: 4
• Subjects: BASIC ELECTRIC ELEMENTS; CONTROLLING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; INFORMATION STORAGE; PHYSICS; REGULATING; SEMICONDUCTOR DEVICES; STATIC STORES; SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES

Disclosed is a restore circuit for restoring an integrated semiconductor storage array having storage cells consisting of bipolar transistors. The restore circuit includes a reference voltage generator, an impedance converter, and switches to connect the reference voltage generator and the impedance converter to the storage array. The reference voltage generating circuit includes a current source and at least one reference storage cell identical in construction to the storage cells of the array. The reference voltage generating circuit provides a reference voltage to the impedance converter which supplies a second reference voltage to the array at a greatly reduced impedance. The equivalent circuit of the storage cells is that of a capacitor in parallel with a diode. Thus, the impedance converter provides an initial surge of capacitive current which restores the cells, followed by a standby current which is a function of the diode characteristics of the cell equivalent circuit.