IMPROVED ACCURATE LOW NOISE ANALOG TO DIGITAL CONVERTER

摘要

An accurate, low noise conditionally resetting integrator circuit in an analog to digital system (10) samples, with an analog to digital converter (18), the output of an integrating circuit (12) a number of times during a measuring period; isolates the input (30) for the integrating circuit during sample event; generates a reset signal (20) in response to the integrating circuit output reaching a predetermined level; and resets the feedback capacitor (16) of the integrating circuit by isolating it from the amplifier circuit of the integrating circuit and connecting it to a reference source (24) during a sample event.