Solid-state storage drive

• US 3,968,385 A
• Filed: 10/31/1974
• Issued: 07/06/1976
• Est. Priority Date: 11/07/1973
• Status: Expired due to Term

• Current Assignee: Digital Equipment Corporation (HP Inc.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Van Tol, Willem Cornelis
• Primary Examiner(s): Miller, Jr., Stanley D.
• Assistant Examiner(s): Davis, B. P.
• Application Number:
  US05/519,619
• Time in Patent Office: 614 Days
• Field of Search: 307/293, 307/246, 307/270, 307/297
• US Class Current: 327/111
• CPC Class Codes: G11C 5/00 Details of stores covered by group G11C11/00
• CPC Class Codes: H03K 17/04113 in bipolar transistor switches H03K17/0412, H03K17/0416 take precedence

Abstract

A drive unit, such as a drive unit for a storage device including an integrated solid-state store, including an input terminal, a capacitively loaded output terminal, and a charging transistor which is connected between a supply terminal and the output terminal. The output terminal is connected, by means of a rectifying member, to a discharge switch, the output terminal also being connected, by means of a capacitive member, to a voltage supply circuit which is connected between the supply terminal and a control electrode of the charging resistor.

Claims

1. A drive unit comprising

an input terminal;

a capacitively loaded output terminal;

a charging transistor connected between said supply terminal and said output terminal, said output terminal being connected through a rectifying member to said input terminal;

a discharge circuit connected between said rectifying member and said input terminal, comprising a transistor having one electrode connected to said rectifying member, and another electrode connected to ground;

said input terminal being connected to the base of said transistor in said discharge circuit by means of a differentiating network comprising a resistor and a capacitor connected in parallel between said input terminal and said base of said transistor in said discharge circuit;

said output terminal being connected, through a capacitive member, to a center tapping of a voltage distribution circuit connected between said supply terminal and a control electrode of said charging transistor so that when said charging transistor is conductive, an additional control voltage is applied to said control electrode.

2. A drive unit as defined in claim 1, wherein said discharge circuit comprises a transistor having one electrode connected to said rectifying member, and another electrode connected to ground.

3. A drive unit as defined in claim 2, wherein said input terminal is connected to the base of said transistor in said discharge circuit by means of a differentiating network.

4. A drive unit as defined in claim 3, wherein said differentiating network comprises a resistor and a capacitor connected in parallel between said input terminal and said base of said transistor in said discharge circuit.