Patent ID: 6751449
Filing Date: 2004-06-15
Classification: H03G,H03J

Abstract:
A circuit configuration for changing between at least two bands in a high-frequency receiver, comprising;a plurality of amplifier stages including a first amplifier stage associated with one of the at least two bands and a second amplifier stage associated with another one of the at least two bands; and a switching mechanism for activating one of said plurality of amplifier stages at a time and thereby selecting one of the at least two bands; each one of said plurality of amplifier stages including a semiconductor switch element having two terminals connected in a main current path and having two control electrodes, one of said two terminals of said semiconductor switch element of each one of said plurality of amplifier stages connected to a constant potential irregardless of which of the at least two bands is selected; said switching mechanism activating the one of said plurality of amplifier stages at a time via one of said two control electrodes of said semiconductor switch element of the activated one of said plurality of amplifier stages.