Electronic digital logic circuitry – Function of and – or – nand – nor – or not – Bipolar and fet
Patent
1994-10-06
1996-04-30
Hudspeth, David R.
Electronic digital logic circuitry
Function of and, or, nand, nor, or not
Bipolar and fet
326 64, H03K 1901
Patent
active
055128475
ABSTRACT:
In an input level converter for TTL--CMOS level conversion (or other conversion to CMOS) for an internal logic block operating with CMOS levels, an output transistor for executing the charge or discharge of the output capacitance thereof is formed of a bipolar transistor. Thus, the propagation delay times and their capacitance-dependencies of the input level converter can be lessened. Similarly, in an output level converter for CMOS--TTL level conversion (or other conversion from CMOS) for the internal logic block operating with the CMOS levels, an output transistor for executing the charge or discharge of the output load capacitance thereof is formed of a bipolar transistor. Thus, the propagation delay times and their capacitance-dependencies of the output level converter can also be lessened.
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Iwamura Masahiro
Kadono Shinji
Masuda Ikuro
Matsubara Toshiaki
Suzuki Yukio
Hitachi , Ltd.
Hudspeth David R.
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