analog to digital converter box for motorola

The subtractor circuit as recited in claim 3 wherein said second means further includes output means coupling said second impedance means to said output for producing said output voltage shifted in level from said voltage.Ħ.

The subtractor circuit as recited in claim 2 wherein said first means further includes input means for coupling said first input to said first impedance means.ĥ. The subtractor circuit as recited in claim 1 wherein said second means includes a second impedance coupled to said first current source means and to said second input for producing a voltage which is proportional to the difference between said analog input voltage and said first reference voltage.Ĥ. The subtractor circuit as recited in claim 1 wherein said first means includes first impedance means coupled to said first input and to said conductor for producing said first current.ģ. Second means coupled to said second input and responsive to said second current and to said first reference voltage for producing an output voltage at said output representative of the difference between said analog input voltage and said first reference voltage.Ģ. A first input for receiving an analog input voltage Ī second input for receiving a first reference voltage Ī conductor for receiving a second reference voltage Ī first means coupled to said input and to said conductor and responsive to said analog input voltage for producing a first current which is a function of the difference between said analog input voltage and said second reference voltage įirst current source means responsive to said first current for producing a second current which is proportional to said first current

Analog to digital converter box for motorola