Patent ID: 6784823
Filing Date: 2004-08-31
Classification: H03M

Abstract:
A dual slope analog to digital converter, comprising:a first operational amplifier; an integrator; a comparator, whose positive input is coupled to the output of the integrator; a resistor coupling the output of the first operational amplifier and the first input of the integrator; and a first capacitor coupling the first input of the integrator and the negative input of the comparator, wherein a plurality of couplings are controlled by a plurality of switches, comprising: a first coupling, controlled by a first set of switches, for optionally forming a negative feedback loop for the first operational amplifier; a second coupling, controlled by a second switch, for optionally forming connection between the negative input of the comparator and the positive terminal of the first operational amplifier, and a third coupling, controlled by a third switch, optionally forming connection of feedback loop from the output of the comparator to the positive terminal of the first operational amplifier.