Static information storage and retrieval – Read/write circuit – Differential sensing
Patent
1995-06-05
1998-04-21
Zarabian, A.
Static information storage and retrieval
Read/write circuit
Differential sensing
365208, G11C 702
Patent
active
057425515
ABSTRACT:
A constant current source is connected in series to a current source circuit including a MOS transistor which is used as a current source for a differential output amplifier circuit, an emitter follower circuit or a source follower circuit used with a semiconductor integrated circuit. In a multiplex circuit, an input signal is inputted to each of base terminals of a plurality of bipolar transistors. When one input signal is selected, the bipolar transistor corresponding to the selected input signal is made to be operable with an input signal from a signal input terminal by a control circuit. The bipolar transistors corresponding to the non-selection input signals are turned OFF irrespective of potential levels of the individual input signals by current drawing circuits. There is also disclosed a semiconductor memory circuit having a plurality of memory cells, a memory cell selection scheme and a sense amplifier for amplifying data outputted from the selected memory cell, in which a constant current circuit is provided in series connection to the sense amplifier to enhance the performance characteristics of the memory circuit. Also, a plural memory array scheme is disclosed which employs multiplexing techniques connected to presense amplifier circuits of the respective memory arrays.
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Japanese Patent Abstracts, vol. 14, No. 18, (E-873) 3961, Jan. 16, 1990.
Akioka Takashi
Iwamura Masahiro
Kobayashi Yutaka
Yukutake Seigoh
Hitachi , Ltd.
Zarabian A.
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