Patent ID: 8410962

Claim:
An active RC resonator, comprising: a first differential integrator; a second differential integrator, wherein first and second inputs of the first differential integrator are respectively coupled to second and first outputs of the second differential integrator via first and second signal paths, and first and second outputs of the first differential integrator are respectively coupled to first and second inputs of the second differential integrator via third and fourth signal paths, each of the first, second, third, and fourth signal paths including a respective resistor; and at least one of: 1) a first capacitor coupled from the first output of the second differential integrator to the first input of the first differential integrator, and a second capacitor coupled from the second output of the second differential integrator to the second input of the first differential integrator, 2) a third capacitor coupled from the first output of the first differential integrator to the second input of the second differential integrator, and a fourth capacitor coupled from the second output of the first differential integrator to the first input of the second differential integrator.