Patent ID: 6819167
Filing Date: 2004-11-16
Classification: H03H

Abstract:
A filter circuit having an input resistance portion, wherein said input resistance portion comprises:a first transconductor having a positive input port, a negative input port, a positive output port and a negative output port, wherein said positive input port is impressed with a first voltage, and wherein said negative input port is impressed with a second voltage; a second transconductor having a positive input port, a negative input port, a positive output port and a negative output port, wherein said positive input port of the second transconductor is impressed with the second voltage, and wherein said negative input port of the second transconductor is impressed with a third voltage; and a third transconductor having a positive input port, a negative input port, a positive output port and a negative output port, wherein said positive input port of the third transconductor is coupled to the positive output ports of the first and second transconductors and the negative output port of the third transconductor, and wherein said negative input port of the third transconductor is coupled to the negative output ports of the first and second transconductors and the positive output port of the third transconductor.