Patent ID: 7639069

Claim:
A system for providing resistive loss compensation in an electronic filter, the resistive loss being a voltage loss across the electronic filter, the resistive loss comprising a balanced resistive loss and an unbalanced resistive loss, the system comprising: a set of cross-connected transconductors comprising: i. a first balanced transconductor, wherein-a positive input terminal of the first balanced transconductor is connected to a positive input terminal of the electronic filter, a negative input terminal of the first balanced transconductor is connected to a negative input terminal of the electronic filter, a positive output terminal of the first balanced transconductor is connected to a negative output terminal of the electronic filter, a negative output terminal of the first balanced transconductor is connected to a positive output terminal of the electronic filter; and ii. a second balanced transconductor, wherein-a positive input terminal of the second balanced transconductor is connected to a positive output terminal of the electronic filter, a negative input terminal of the second balanced transconductor is connected to a negative output terminal of the electronic filter, a positive output terminal of the second balanced transconductor is connected to a negative input terminal of the electronic filter, a negative output terminal of the second balanced transconductor is connected to a positive input terminal of the electronic filter; and a set of self-connected transconductors comprising: i. a third balanced transconductor, wherein a positive input terminal of the third balanced transconductor and a positive output terminal of the third balanced transconductor is connected to the positive input terminal of the electronic filter, a negative input terminal of the third balanced transconductor and a negative output terminal of the third balanced transconductor is connected to the negative input terminal of the electronic filter; and ii. a fourth balanced transconductor, wherein a positive input terminal of the fourth transconductor and a positive output terminal of the fourth transconductor is connected to the positive output terminal of the electronic filter, a negative input terminal of the fourth balanced transconductor and a negative output terminal of the fourth balanced transconductor is connected to the negative output terminal of the electronic filter; and wherein the inputs to each of the set of cross-connected transconductors and each of the set of self-connected transconductors are balanced and the set of cross-connected transconductors and the set of self-connected transconductors function as a differential negative resistor to compensate the balanced resistive loss and the unbalanced resistive loss across the electronic filter.