Patent ID: 6037885
Filing Date: 2000-03-14
Classification: H03M

Abstract:
A digital-to-analog converter comprising:a single neuron MOS transistor having a floating gate and a drain potential associated therewith;maintenance circuit means for maintaining said drain potential of said neuron MOS transistor constant;a current source, said neuron MOS transistor, said maintenance circuit means and said current source being connected in series;means for connecting said current source to a first supply voltage;means for connecting said neuron MOS transistor to a second supply voltage;a plurality of converter inputs which receive a digital input word, said plurality of converter inputs respectively having place values i and including a converter input having a place value i=1;a plurality of coupling capacitances respectively capacitively coupling all of said converter inputs to said floating gate of said neuron MOS transistor and including a smallest coupling capacitance associated with said converter input having the place value i=1, said coupling capacitances respectively coupling said plurality of converter inputs to said floating gate with respective different coupling capacitances which are successively larger by a factor 2.sup.i-1 than said smallest coupling capacitance; anda converter output directly connected to said current source and capacitively connected to said floating gate via a further coupling capacitance.