Patent ID: 6307404
Filing Date: 2001-10-23
Classification: H03K

Abstract:
A gate that can execute the logic function Q=AB wherein Q is an output signal and A and B are first and second input signals, the gate comprising:first and second electrical loads; andfirst and second current-switching modules each coupled to said first and second electrical loads;wherein said first module includes:a) a first differential pair of transistors coupled to steer a first current to a first path and to steer said first current to said second load in response to respective polarities of said first input signal; andb) a second differential pair of transistors coupled to receive said first current from said first path and coupled to steer said first current to said first load and to steer said first current to said second load in response to respective polarities of said second input signal;and wherein said second module includes:a) a third differential pair of transistors coupled to steer a second current along a second path and to steer said second current to said second load in response to respective polarities of said second input signal; andb) a fourth differential pair of transistors coupled to receive said second current from said second path and coupled to steer said second current to said first load and to steer said second current to said second load in response to respective polarities of said first input signal;flow of said first and second currents through said first and second loads forming said output signal and the cross-coupling of said first and second input signals to said first and second current-switching modules reducing propagation-delay variations in said gate.