Patent ID: 7098718

Claim:
A current mode integrator, comprising: first and second sections, each section including first, second, and third current sources; first, second and third transistors; an operational transconductance amplifier (OTA); and an integration capacitor, wherein the first current source is connected to the first transistor at an input node, the second current source is connected to the second transistor at a second node, and the third current source is connected to the third transistor at an output node, and each current source is configured to provide a bias current to the respective transistor connected thereto, wherein the OTA has a non-inverting input connected to the input node, an inverting input connected to a reference voltage, and an output connected to respective control electrodes of the first, second, and third transistors and to the integration capacitor, wherein the input node of the first section is connected to the second node of the second section, and the input node of the second section is connected to the second node of the first section, and wherein the input nodes of the first and second sections are configured to receive differential input currents, respectively, and the output nodes of the first and second sections are configured to provide differential output currents, respectively.