Patent ID: 6980049

Claim:
Polypbase-Notchfilter for filtering input signals comprising: supply voltage input means for supplying voltage; bandpass filter means comprising, a first set of at least two first voltage-controlled current sources, a first set of at least two input means coupled to said first set of at least two first voltage-controlled current sources for receiving first input signals applied to said bandpass filter means, a first set of at least two output means providing filtered output signals of said first input signals, first coupling means coupled to said supply voltage input means, said first set of at least two first voltage-controlled current sources and said first set of at least two output means, a second set of at least two first voltage-controlled current sources, a second set of at least two input means coupled to said second set of at least two first voltage-controlled current sources for receiving second input signals applied to said bandpass filter means, a second set of at least two output means providing filtered output signals of said second input signals, second coupling means coupled to said supply voltage input means, said second set of at least two first voltage-controlled current sources and said second set of at least two output means, and at least one second voltage-controlled current source coupled to said first set of at least two input means and said first set of at least two output means and further coupled to said first set of at least two first voltage-controlled current sources so that input terminals are connected opposite in polarity, and at least another second voltage-controlled current source coupled to said second set of at least two input means and said second set of at least two output means and further coupled to said second set of at least two first voltage-controlled current sources so that input terminals are connected opposite in polarity.