DECODING AND SELECTION CIRCUIT FOR MONOLITHIC MEMORY

    公开(公告)号:DE3070584D1

    公开(公告)日:1985-06-05

    申请号:DE3070584

    申请日:1980-09-26

    Applicant: IBM IBM FRANCE

    Abstract: A word line selection circuit includes a conventional Schottky diode decoder and a driver transistor which is connected to a word line. A word line is selected when the transistor is conductive and all associated diodes of the decoder are off. The base current of the driver transistor is defined by a control transistor whose conductivity is opposite to that of the driver transistor and which applies the selection current to the base of the driver transistor. A regulating transistor forms a current mirror with the control transistor to regulate the selection current. A compensation circuit associated with the regulating transistor modulates the collector current of the regulating transistor as a function of the driver transistor factor.

    TRUE/COMPLEMENT GENERATOR
    4.
    发明专利

    公开(公告)号:DE3279782D1

    公开(公告)日:1989-07-27

    申请号:DE3279782

    申请日:1982-03-24

    Applicant: IBM IBM FRANCE

    Abstract: A true/complement generator for generating the complement and true value of weighted address bits, preventing an address decoder from selecting several lines at the same time. It comprises two circuits (1) and (2), the first one providing the true value ( phi ), the second one providing the complement ( phi ) thereof. The means provided for preventing multiple selections from occurring, comprise in the first circuit, a transistor (T11-1) for delaying the rising edge of ( phi ) as long as it is maintained on by the level provided by resistors R11-1 and R10-2 from output phi . Transistor T11-2 in the second circuit prevents phi from going high as long as it is maintained on by the level provided by R10-1, R11-2 from phi .

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