Patent ID: 7479910

Claim:
An implantable medical device comprising: at least one sensor that generates an analog input signal; at least one analog-to-digital converter (ADC) that converts the analog input signal to a digital signal, the ADC comprising: a continuous time (CT) integrator that integrates a difference between the analog input signal and a reconstruction of the analog input signal; a capacitive digital-to-analog converter (CAPDAC) that includes a plurality of capacitors that are used to generate the reconstruction of the analog input signal based on the digital signal, wherein an output of the CAPDAC provides the reconstruction of the analog input signal to a negative feedback input of the CT integrator; and a switch that disconnects the output of the CAPDAC from the negative feedback input of the CT integrator and connects the output of the CAPDAC to a capacitive load in response to a reset signal; and a processor that receives the digital signal from the ADC.