Patent ID: 8253473
Filing Date: 2012-08-28
Classification: H03H,Y10T

Abstract:
1. An integrated circuit integrator comprising: a first transconductance amplifier having a gain adjustable based upon a first control signal, and configured to receive, as an input, a signal to be filtered, and configured to generate, as an output, a corresponding amplified signal; said first transconductance amplifier comprising an R-C output circuit to filter components from the amplified signal, said first transconductance amplifier having an output resistance being adjustable based upon a second control signal; a second transconductance amplifier matched with said first transconductance amplifier, having a gain adjustable based upon the first control signal, said second transconductance amplifier having a matched output resistance adjustable based upon the second control signal; a circuit configured to force a reference current through the matched output resistance; and an error correction circuit coupled to said second transconductance amplifier and configured to generate the second control signal so as to keep constant a voltage on an output of said second transconductance amplifier.