Method and apparatus for generating nose wheel speed signals

Claim 1

A converter circuit for generating nose wheel speed signals from main landing gear wheel speed signals by selecting the greater of: V L ; V R ; K 1 V L -K 2 V R ; and, K 1 V R -K 2 V L where V L and V R are the signals representative of left and right main gear wheel velocities, and K 1 and K 2 are fixed constants, said converter comprising: means for generating the said V L and V R signals; a first converter input terminal; a second converter input terminal; a converter output has a plurality of terminals; a select largest input circuit having an output terminal coupled to said converter output terminals, said select largest input circuit having first, second, third, and fourth input terminals; a first summing circuit having a plurality of input terminals coupled to said V L and V R signals for generating K 1 V L -K 2 V R , and an output terminal coupled to said second input terminal of said select largest input circuit; a second summing circuit having a plurality of input terminals coupled to said V L and V R signals for generating K 1 V R -K 2 V L , and an output terminal coupled to said third input terminal of said select largest input circuit; a first conductive circuit coupled said V L signal to said first converter input terminal and to said first input terminal of said select largest input circuit; and a second conductive circuit coupled said V R signal to said second converter input terminal and to said fourth input terminal of said select largest input circuit; a first conductive circuit connection between said first converter input terminal and said first input terminal of said select largest input circuit; and a second conductive circuit connection between said second converter input terminal and said fourth input terminal of said select largest input circuit.