Patent ID: 6300816
Filing Date: 2001-10-09
Classification: G11C

Abstract:
A circuit for discriminating between complementary first and second input signals which may or may not be in distinctly complementary states and may be in indeterminate states, comprising:a logic gate circuit having as inputs the first and second input signals and producing a first output when the first and second input signals are not in distinctly complementary states and a second output when the first and second input signals are in distinctly complementary states;a signal amplifying circuit having as inputs the first and second input signals and the logic gate circuit output, the signal amplifying circuit being enabled by the first output and producing an output which varies depending upon whether the first input signal is greater than, equal to, or less than the second input signal, and being disabled by the second output; andan input select circuit having as inputs the signal amplifying circuit output and either the first or second input signal, the input select circuit producing an output dependant upon the signal amplifying circuit output when the signal amplifying circuit is enabled and an output dependant upon either the first or second input signal when the signal amplifying circuit is disabled.