Fully integrated dc offset compensation servo feedback loop

A fully integrated DC offset compensation servo feedback loop, comprising:

• a differential dual op amp integrated circuit having a negative input terminal, a positive input terminal, a positive output terminal, and a negative output terminal;
• first and second RC circuits configuring the integrated circuit as a differential integrator, the first RC circuit having a first digitally programmable R-2-R ladder forming the resistive component of the RC circuit, the negative input terminal being connected between the resistive and capacitive components of the first RC circuit, and the second RC circuit having a second digitally programmable R-2-R ladder forming the resistive component of the RC circuit, the positive input terminal being connected between the resistive and capacitive components of the second RC circuit;
• wherein the servo feedback loop is adapted for connection to a high-gain, low pass network in summation circuitry that sums with signals having a DC offset component input, the positive output terminal and the negative output terminal of the op amp integrated circuit being adapted for connection at first and second inputs, respectively, of the high-gain, low pass network, first and second outputs of the high gain low pass network being adapted for connection as differential inputs to the op amp integrated circuit through the first and second R-2-R ladders, respectively, the servo feedback loop being configured for substantially attenuating the DC offset component from the signals summed in the high-gain, low pass network.