Patent ID: 7746166

Claim:
A filter circuit arrangement comprising: a first pair of transistors; a first and a second switch for switching between a first and a second frequency band operating mode; a first connection of the first switch being connected to a control gate of the first transistor of the first pair of transistors; a second connection of the first switch being connected to a control gate of the second transistor of the first pair of transistors; a first connection of the second switch being connected to the control gate of the first transistor of the first pair of transistors; a second connection of the second switch being connected to a reference voltage; a second pair of transistors; a third switch; a first connection of the third switch being connected to the first transistor of first pair of transistors and to the first transistor of the second pair of transistors; and a second connection of the third switch being connected to the second transistor of the first pair of transistors and to the second transistor of the second pair of transistors.